Merge tag 'usb-3.6' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/usb

Pull USB changes from Greg Kroah-Hartman:
 "Here is the big USB pull request for 3.7-rc1

  There are lots of gadget driver changes (including copying a bunch of
  files into the drivers/staging/ccg/ directory so that the other gadget
  drivers can be fixed up properly without breaking that driver), and we
  remove the old obsolete ub.c driver from the tree.

  There are also the usual XHCI set of updates, and other various driver
  changes and updates.  We also are trying hard to remove the old dbg()
  macro, but the final bits of that removal will be coming in through
  the networking tree before we can delete it for good.

  All of these patches have been in the linux-next tree.

  Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>"

Fix up several annoying - but fairly mindless - conflicts due to the
termios structure having moved into the tty device, and often clashing
with dbg -> dev_dbg conversion.

* tag 'usb-3.6' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/usb: (339 commits)
  USB: ezusb: move ezusb.c from drivers/usb/serial to drivers/usb/misc
  USB: uas: fix gcc warning
  USB: uas: fix locking
  USB: Fix race condition when removing host controllers
  USB: uas: add locking
  USB: uas: fix abort
  USB: uas: remove aborted field, replace with status bit.
  USB: uas: fix task management
  USB: uas: keep track of command urbs
  xhci: Intel Panther Point BEI quirk.
  powerpc/usb: remove checking PHY_CLK_VALID for UTMI PHY
  USB: ftdi_sio: add TIAO USB Multi-Protocol Adapter (TUMPA) support
  Revert "usb : Add sysfs files to control port power."
  USB: serial: remove vizzini driver
  usb: host: xhci: Fix Null pointer dereferencing with 71c731a for non-x86 systems
  Increase XHCI suspend timeout to 16ms
  USB: ohci-at91: fix null pointer in ohci_hcd_at91_overcurrent_irq
  USB: sierra_ms: don't keep unused variable
  fsl/usb: Add support for USB controller version 2.4
  USB: qcaux: add Pantech vendor class match
  ...

3 files changed, 0 insertions, 2487 deletions

diff --git a/drivers/block/Kconfig b/drivers/block/Kconfig
index a796407123c7..f529407db93f 100644
--- a/drivers/block/Kconfig
+++ b/drivers/block/Kconfig
@@ -353,18 +353,6 @@ config BLK_DEV_SX8
 
 	  Use devices /dev/sx8/$N and /dev/sx8/$Np$M.
 
-config BLK_DEV_UB
-	tristate "Low Performance USB Block driver (deprecated)"
-	depends on USB
-	help
-	  This driver supports certain USB attached storage devices
-	  such as flash keys.
-
-	  If you enable this driver, it is recommended to avoid conflicts
-	  with usb-storage by enabling USB_LIBUSUAL.
-
-	  If unsure, say N.
-
 config BLK_DEV_RAM
 	tristate "RAM block device support"
 	---help---
diff --git a/drivers/block/Makefile b/drivers/block/Makefile
index 5b795059f8fb..17e82df3df74 100644
--- a/drivers/block/Makefile
+++ b/drivers/block/Makefile
@@ -33,7 +33,6 @@ obj-$(CONFIG_VIRTIO_BLK)	+= virtio_blk.o
 
 obj-$(CONFIG_VIODASD)		+= viodasd.o
 obj-$(CONFIG_BLK_DEV_SX8)	+= sx8.o
-obj-$(CONFIG_BLK_DEV_UB)	+= ub.o
 obj-$(CONFIG_BLK_DEV_HD)	+= hd.o
 
 obj-$(CONFIG_XEN_BLKDEV_FRONTEND)	+= xen-blkfront.o
diff --git a/drivers/block/ub.c b/drivers/block/ub.c
deleted file mode 100644
index fcec0225ac76..000000000000
--- a/drivers/block/ub.c
+++ /dev/null
@@ -1,2474 +0,0 @@
-/*
- * The low performance USB storage driver (ub).
- *
- * Copyright (c) 1999, 2000 Matthew Dharm (mdharm-usb@one-eyed-alien.net)
- * Copyright (C) 2004 Pete Zaitcev (zaitcev@yahoo.com)
- *
- * This work is a part of Linux kernel, is derived from it,
- * and is not licensed separately. See file COPYING for details.
- *
- * TODO (sorted by decreasing priority)
- *  -- Return sense now that rq allows it (we always auto-sense anyway).
- *  -- set readonly flag for CDs, set removable flag for CF readers
- *  -- do inquiry and verify we got a disk and not a tape (for LUN mismatch)
- *  -- verify the 13 conditions and do bulk resets
- *  -- highmem
- *  -- move top_sense and work_bcs into separate allocations (if they survive)
- *     for cache purists and esoteric architectures.
- *  -- Allocate structure for LUN 0 before the first ub_sync_tur, avoid NULL. ?
- *  -- prune comments, they are too volumnous
- *  -- Resove XXX's
- *  -- CLEAR, CLR2STS, CLRRS seem to be ripe for refactoring.
- */
-#include <linux/kernel.h>
-#include <linux/module.h>
-#include <linux/usb.h>
-#include <linux/usb_usual.h>
-#include <linux/blkdev.h>
-#include <linux/timer.h>
-#include <linux/scatterlist.h>
-#include <linux/slab.h>
-#include <linux/mutex.h>
-#include <scsi/scsi.h>
-
-#define DRV_NAME "ub"
-
-#define UB_MAJOR 180
-
-/*
- * The command state machine is the key model for understanding of this driver.
- *
- * The general rule is that all transitions are done towards the bottom
- * of the diagram, thus preventing any loops.
- *
- * An exception to that is how the STAT state is handled. A counter allows it
- * to be re-entered along the path marked with [C].
- *
- *       +--------+
- *       ! INIT   !
- *       +--------+
- *           !
- *        ub_scsi_cmd_start fails ->--------------------------------------\
- *           !                                                            !
- *           V                                                            !
- *       +--------+                                                       !
- *       ! CMD    !                                                       !
- *       +--------+                                                       !
- *           !                                            +--------+      !
- *         was -EPIPE -->-------------------------------->! CLEAR  !      !
- *           !                                            +--------+      !
- *           !                                                !           !
- *         was error -->------------------------------------- ! --------->\
- *           !                                                !           !
- *  /--<-- cmd->dir == NONE ?                                 !           !
- *  !        !                                                !           !
- *  !        V                                                !           !
- *  !    +--------+                                           !           !
- *  !    ! DATA   !                                           !           !
- *  !    +--------+                                           !           !
- *  !        !                           +---------+          !           !
- *  !      was -EPIPE -->--------------->! CLR2STS !          !           !
- *  !        !                           +---------+          !           !
- *  !        !                                !               !           !
- *  !        !                              was error -->---- ! --------->\
- *  !      was error -->--------------------- ! ------------- ! --------->\
- *  !        !                                !               !           !
- *  !        V                                !               !           !
- *  \--->+--------+                           !               !           !
- *       ! STAT   !<--------------------------/               !           !
- *  /--->+--------+                                           !           !
- *  !        !                                                !           !
- * [C]     was -EPIPE -->-----------\                         !           !
- *  !        !                      !                         !           !
- *  +<---- len == 0                 !                         !           !
- *  !        !                      !                         !           !
- *  !      was error -->--------------------------------------!---------->\
- *  !        !                      !                         !           !
- *  +<---- bad CSW                  !                         !           !
- *  +<---- bad tag                  !                         !           !
- *  !        !                      V                         !           !
- *  !        !                 +--------+                     !           !
- *  !        !                 ! CLRRS  !                     !           !
- *  !        !                 +--------+                     !           !
- *  !        !                      !                         !           !
- *  \------- ! --------------------[C]--------\               !           !
- *           !                                !               !           !
- *         cmd->error---\                +--------+           !           !
- *           !          +--------------->! SENSE  !<----------/           !
- *         STAT_FAIL----/                +--------+                       !
- *           !                                !                           V
- *           !                                V                      +--------+
- *           \--------------------------------\--------------------->! DONE   !
- *                                                                   +--------+
- */
-
-/*
- * This many LUNs per USB device.
- * Every one of them takes a host, see UB_MAX_HOSTS.
- */
-#define UB_MAX_LUNS   9
-
-/*
- */
-
-#define UB_PARTS_PER_LUN      8
-
-#define UB_MAX_CDB_SIZE      16		/* Corresponds to Bulk */
-
-#define UB_SENSE_SIZE  18
-
-/*
- */
-struct ub_dev;
-
-#define UB_MAX_REQ_SG	9	/* cdrecord requires 32KB and maybe a header */
-#define UB_MAX_SECTORS 64
-
-/*
- * A second is more than enough for a 32K transfer (UB_MAX_SECTORS)
- * even if a webcam hogs the bus, but some devices need time to spin up.
- */
-#define UB_URB_TIMEOUT	(HZ*2)
-#define UB_DATA_TIMEOUT	(HZ*5)	/* ZIP does spin-ups in the data phase */
-#define UB_STAT_TIMEOUT	(HZ*5)	/* Same spinups and eject for a dataless cmd. */
-#define UB_CTRL_TIMEOUT	(HZ/2)	/* 500ms ought to be enough to clear a stall */
-
-/*
- * An instance of a SCSI command in transit.
- */
-#define UB_DIR_NONE	0
-#define UB_DIR_READ	1
-#define UB_DIR_ILLEGAL2	2
-#define UB_DIR_WRITE	3
-
-#define UB_DIR_CHAR(c)  (((c)==UB_DIR_WRITE)? 'w': \
-			 (((c)==UB_DIR_READ)? 'r': 'n'))
-
-enum ub_scsi_cmd_state {
-	UB_CMDST_INIT,			/* Initial state */
-	UB_CMDST_CMD,			/* Command submitted */
-	UB_CMDST_DATA,			/* Data phase */
-	UB_CMDST_CLR2STS,		/* Clearing before requesting status */
-	UB_CMDST_STAT,			/* Status phase */
-	UB_CMDST_CLEAR,			/* Clearing a stall (halt, actually) */
-	UB_CMDST_CLRRS,			/* Clearing before retrying status */
-	UB_CMDST_SENSE,			/* Sending Request Sense */
-	UB_CMDST_DONE			/* Final state */
-};
-
-struct ub_scsi_cmd {
-	unsigned char cdb[UB_MAX_CDB_SIZE];
-	unsigned char cdb_len;
-
-	unsigned char dir;		/* 0 - none, 1 - read, 3 - write. */
-	enum ub_scsi_cmd_state state;
-	unsigned int tag;
-	struct ub_scsi_cmd *next;
-
-	int error;			/* Return code - valid upon done */
-	unsigned int act_len;		/* Return size */
-	unsigned char key, asc, ascq;	/* May be valid if error==-EIO */
-
-	int stat_count;			/* Retries getting status. */
-	unsigned int timeo;		/* jiffies until rq->timeout changes */
-
-	unsigned int len;		/* Requested length */
-	unsigned int current_sg;
-	unsigned int nsg;		/* sgv[nsg] */
-	struct scatterlist sgv[UB_MAX_REQ_SG];
-
-	struct ub_lun *lun;
-	void (*done)(struct ub_dev *, struct ub_scsi_cmd *);
-	void *back;
-};
-
-struct ub_request {
-	struct request *rq;
-	unsigned int current_try;
-	unsigned int nsg;		/* sgv[nsg] */
-	struct scatterlist sgv[UB_MAX_REQ_SG];
-};
-
-/*
- */
-struct ub_capacity {
-	unsigned long nsec;		/* Linux size - 512 byte sectors */
-	unsigned int bsize;		/* Linux hardsect_size */
-	unsigned int bshift;		/* Shift between 512 and hard sects */
-};
-
-/*
- * This is a direct take-off from linux/include/completion.h
- * The difference is that I do not wait on this thing, just poll.
- * When I want to wait (ub_probe), I just use the stock completion.
- *
- * Note that INIT_COMPLETION takes no lock. It is correct. But why
- * in the bloody hell that thing takes struct instead of pointer to struct
- * is quite beyond me. I just copied it from the stock completion.
- */
-struct ub_completion {
-	unsigned int done;
-	spinlock_t lock;
-};
-
-static DEFINE_MUTEX(ub_mutex);
-static inline void ub_init_completion(struct ub_completion *x)
-{
-	x->done = 0;
-	spin_lock_init(&x->lock);
-}
-
-#define UB_INIT_COMPLETION(x)	((x).done = 0)
-
-static void ub_complete(struct ub_completion *x)
-{
-	unsigned long flags;
-
-	spin_lock_irqsave(&x->lock, flags);
-	x->done++;
-	spin_unlock_irqrestore(&x->lock, flags);
-}
-
-static int ub_is_completed(struct ub_completion *x)
-{
-	unsigned long flags;
-	int ret;
-
-	spin_lock_irqsave(&x->lock, flags);
-	ret = x->done;
-	spin_unlock_irqrestore(&x->lock, flags);
-	return ret;
-}
-
-/*
- */
-struct ub_scsi_cmd_queue {
-	int qlen, qmax;
-	struct ub_scsi_cmd *head, *tail;
-};
-
-/*
- * The block device instance (one per LUN).
- */
-struct ub_lun {
-	struct ub_dev *udev;
-	struct list_head link;
-	struct gendisk *disk;
-	int id;				/* Host index */
-	int num;			/* LUN number */
-	char name[16];
-
-	int changed;			/* Media was changed */
-	int removable;
-	int readonly;
-
-	struct ub_request urq;
-
-	/* Use Ingo's mempool if or when we have more than one command. */
-	/*
-	 * Currently we never need more than one command for the whole device.
-	 * However, giving every LUN a command is a cheap and automatic way
-	 * to enforce fairness between them.
-	 */
-	int cmda[1];
-	struct ub_scsi_cmd cmdv[1];
-
-	struct ub_capacity capacity; 
-};
-
-/*
- * The USB device instance.
- */
-struct ub_dev {
-	spinlock_t *lock;
-	atomic_t poison;		/* The USB device is disconnected */
-	int openc;			/* protected by ub_lock! */
-					/* kref is too implicit for our taste */
-	int reset;			/* Reset is running */
-	int bad_resid;
-	unsigned int tagcnt;
-	char name[12];
-	struct usb_device *dev;
-	struct usb_interface *intf;
-
-	struct list_head luns;
-
-	unsigned int send_bulk_pipe;	/* cached pipe values */
-	unsigned int recv_bulk_pipe;
-	unsigned int send_ctrl_pipe;
-	unsigned int recv_ctrl_pipe;
-
-	struct tasklet_struct tasklet;
-
-	struct ub_scsi_cmd_queue cmd_queue;
-	struct ub_scsi_cmd top_rqs_cmd;	/* REQUEST SENSE */
-	unsigned char top_sense[UB_SENSE_SIZE];
-
-	struct ub_completion work_done;
-	struct urb work_urb;
-	struct timer_list work_timer;
-	int last_pipe;			/* What might need clearing */
-	__le32 signature;		/* Learned signature */
-	struct bulk_cb_wrap work_bcb;
-	struct bulk_cs_wrap work_bcs;
-	struct usb_ctrlrequest work_cr;
-
-	struct work_struct reset_work;
-	wait_queue_head_t reset_wait;
-};
-
-/*
- */
-static void ub_cleanup(struct ub_dev *sc);
-static int ub_request_fn_1(struct ub_lun *lun, struct request *rq);
-static void ub_cmd_build_block(struct ub_dev *sc, struct ub_lun *lun,
-    struct ub_scsi_cmd *cmd, struct ub_request *urq);
-static void ub_cmd_build_packet(struct ub_dev *sc, struct ub_lun *lun,
-    struct ub_scsi_cmd *cmd, struct ub_request *urq);
-static void ub_rw_cmd_done(struct ub_dev *sc, struct ub_scsi_cmd *cmd);
-static void ub_end_rq(struct request *rq, unsigned int status);
-static int ub_rw_cmd_retry(struct ub_dev *sc, struct ub_lun *lun,
-    struct ub_request *urq, struct ub_scsi_cmd *cmd);
-static int ub_submit_scsi(struct ub_dev *sc, struct ub_scsi_cmd *cmd);
-static void ub_urb_complete(struct urb *urb);
-static void ub_scsi_action(unsigned long _dev);
-static void ub_scsi_dispatch(struct ub_dev *sc);
-static void ub_scsi_urb_compl(struct ub_dev *sc, struct ub_scsi_cmd *cmd);
-static void ub_data_start(struct ub_dev *sc, struct ub_scsi_cmd *cmd);
-static void ub_state_done(struct ub_dev *sc, struct ub_scsi_cmd *cmd, int rc);
-static int __ub_state_stat(struct ub_dev *sc, struct ub_scsi_cmd *cmd);
-static void ub_state_stat(struct ub_dev *sc, struct ub_scsi_cmd *cmd);
-static void ub_state_stat_counted(struct ub_dev *sc, struct ub_scsi_cmd *cmd);
-static void ub_state_sense(struct ub_dev *sc, struct ub_scsi_cmd *cmd);
-static int ub_submit_clear_stall(struct ub_dev *sc, struct ub_scsi_cmd *cmd,
-    int stalled_pipe);
-static void ub_top_sense_done(struct ub_dev *sc, struct ub_scsi_cmd *scmd);
-static void ub_reset_enter(struct ub_dev *sc, int try);
-static void ub_reset_task(struct work_struct *work);
-static int ub_sync_tur(struct ub_dev *sc, struct ub_lun *lun);
-static int ub_sync_read_cap(struct ub_dev *sc, struct ub_lun *lun,
-    struct ub_capacity *ret);
-static int ub_sync_reset(struct ub_dev *sc);
-static int ub_probe_clear_stall(struct ub_dev *sc, int stalled_pipe);
-static int ub_probe_lun(struct ub_dev *sc, int lnum);
-
-/*
- */
-#ifdef CONFIG_USB_LIBUSUAL
-
-#define ub_usb_ids  usb_storage_usb_ids
-#else
-
-static const struct usb_device_id ub_usb_ids[] = {
-	{ USB_INTERFACE_INFO(USB_CLASS_MASS_STORAGE, USB_SC_SCSI, USB_PR_BULK) },
-	{ }
-};
-
-MODULE_DEVICE_TABLE(usb, ub_usb_ids);
-#endif /* CONFIG_USB_LIBUSUAL */
-
-/*
- * Find me a way to identify "next free minor" for add_disk(),
- * and the array disappears the next day. However, the number of
- * hosts has something to do with the naming and /proc/partitions.
- * This has to be thought out in detail before changing.
- * If UB_MAX_HOST was 1000, we'd use a bitmap. Or a better data structure.
- */
-#define UB_MAX_HOSTS  26
-static char ub_hostv[UB_MAX_HOSTS];
-
-#define UB_QLOCK_NUM 5
-static spinlock_t ub_qlockv[UB_QLOCK_NUM];
-static int ub_qlock_next = 0;
-
-static DEFINE_SPINLOCK(ub_lock);	/* Locks globals and ->openc */
-
-/*
- * The id allocator.
- *
- * This also stores the host for indexing by minor, which is somewhat dirty.
- */
-static int ub_id_get(void)
-{
-	unsigned long flags;
-	int i;
-
-	spin_lock_irqsave(&ub_lock, flags);
-	for (i = 0; i < UB_MAX_HOSTS; i++) {
-		if (ub_hostv[i] == 0) {
-			ub_hostv[i] = 1;
-			spin_unlock_irqrestore(&ub_lock, flags);
-			return i;
-		}
-	}
-	spin_unlock_irqrestore(&ub_lock, flags);
-	return -1;
-}
-
-static void ub_id_put(int id)
-{
-	unsigned long flags;
-
-	if (id < 0 || id >= UB_MAX_HOSTS) {
-		printk(KERN_ERR DRV_NAME ": bad host ID %d\n", id);
-		return;
-	}
-
-	spin_lock_irqsave(&ub_lock, flags);
-	if (ub_hostv[id] == 0) {
-		spin_unlock_irqrestore(&ub_lock, flags);
-		printk(KERN_ERR DRV_NAME ": freeing free host ID %d\n", id);
-		return;
-	}
-	ub_hostv[id] = 0;
-	spin_unlock_irqrestore(&ub_lock, flags);
-}
-
-/*
- * This is necessitated by the fact that blk_cleanup_queue does not
- * necesserily destroy the queue. Instead, it may merely decrease q->refcnt.
- * Since our blk_init_queue() passes a spinlock common with ub_dev,
- * we have life time issues when ub_cleanup frees ub_dev.
- */
-static spinlock_t *ub_next_lock(void)
-{
-	unsigned long flags;
-	spinlock_t *ret;
-
-	spin_lock_irqsave(&ub_lock, flags);
-	ret = &ub_qlockv[ub_qlock_next];
-	ub_qlock_next = (ub_qlock_next + 1) % UB_QLOCK_NUM;
-	spin_unlock_irqrestore(&ub_lock, flags);
-	return ret;
-}
-
-/*
- * Downcount for deallocation. This rides on two assumptions:
- *  - once something is poisoned, its refcount cannot grow
- *  - opens cannot happen at this time (del_gendisk was done)
- * If the above is true, we can drop the lock, which we need for
- * blk_cleanup_queue(): the silly thing may attempt to sleep.
- * [Actually, it never needs to sleep for us, but it calls might_sleep()]
- */
-static void ub_put(struct ub_dev *sc)
-{
-	unsigned long flags;
-
-	spin_lock_irqsave(&ub_lock, flags);
-	--sc->openc;
-	if (sc->openc == 0 && atomic_read(&sc->poison)) {
-		spin_unlock_irqrestore(&ub_lock, flags);
-		ub_cleanup(sc);
-	} else {
-		spin_unlock_irqrestore(&ub_lock, flags);
-	}
-}
-
-/*
- * Final cleanup and deallocation.
- */
-static void ub_cleanup(struct ub_dev *sc)
-{
-	struct list_head *p;
-	struct ub_lun *lun;
-	struct request_queue *q;
-
-	while (!list_empty(&sc->luns)) {
-		p = sc->luns.next;
-		lun = list_entry(p, struct ub_lun, link);
-		list_del(p);
-
-		/* I don't think queue can be NULL. But... Stolen from sx8.c */
-		if ((q = lun->disk->queue) != NULL)
-			blk_cleanup_queue(q);
-		/*
-		 * If we zero disk->private_data BEFORE put_disk, we have
-		 * to check for NULL all over the place in open, release,
-		 * check_media and revalidate, because the block level
-		 * semaphore is well inside the put_disk.
-		 * But we cannot zero after the call, because *disk is gone.
-		 * The sd.c is blatantly racy in this area.
-		 */
-		/* disk->private_data = NULL; */
-		put_disk(lun->disk);
-		lun->disk = NULL;
-
-		ub_id_put(lun->id);
-		kfree(lun);
-	}
-
-	usb_set_intfdata(sc->intf, NULL);
-	usb_put_intf(sc->intf);
-	usb_put_dev(sc->dev);
-	kfree(sc);
-}
-
-/*
- * The "command allocator".
- */
-static struct ub_scsi_cmd *ub_get_cmd(struct ub_lun *lun)
-{
-	struct ub_scsi_cmd *ret;
-
-	if (lun->cmda[0])
-		return NULL;
-	ret = &lun->cmdv[0];
-	lun->cmda[0] = 1;
-	return ret;
-}
-
-static void ub_put_cmd(struct ub_lun *lun, struct ub_scsi_cmd *cmd)
-{
-	if (cmd != &lun->cmdv[0]) {
-		printk(KERN_WARNING "%s: releasing a foreign cmd %p\n",
-		    lun->name, cmd);
-		return;
-	}
-	if (!lun->cmda[0]) {
-		printk(KERN_WARNING "%s: releasing a free cmd\n", lun->name);
-		return;
-	}
-	lun->cmda[0] = 0;
-}
-
-/*
- * The command queue.
- */
-static void ub_cmdq_add(struct ub_dev *sc, struct ub_scsi_cmd *cmd)
-{
-	struct ub_scsi_cmd_queue *t = &sc->cmd_queue;
-
-	if (t->qlen++ == 0) {
-		t->head = cmd;
-		t->tail = cmd;
-	} else {
-		t->tail->next = cmd;
-		t->tail = cmd;
-	}
-
-	if (t->qlen > t->qmax)
-		t->qmax = t->qlen;
-}
-
-static void ub_cmdq_insert(struct ub_dev *sc, struct ub_scsi_cmd *cmd)
-{
-	struct ub_scsi_cmd_queue *t = &sc->cmd_queue;
-
-	if (t->qlen++ == 0) {
-		t->head = cmd;
-		t->tail = cmd;
-	} else {
-		cmd->next = t->head;
-		t->head = cmd;
-	}
-
-	if (t->qlen > t->qmax)
-		t->qmax = t->qlen;
-}
-
-static struct ub_scsi_cmd *ub_cmdq_pop(struct ub_dev *sc)
-{
-	struct ub_scsi_cmd_queue *t = &sc->cmd_queue;
-	struct ub_scsi_cmd *cmd;
-
-	if (t->qlen == 0)
-		return NULL;
-	if (--t->qlen == 0)
-		t->tail = NULL;
-	cmd = t->head;
-	t->head = cmd->next;
-	cmd->next = NULL;
-	return cmd;
-}
-
-#define ub_cmdq_peek(sc)  ((sc)->cmd_queue.head)
-
-/*
- * The request function is our main entry point
- */
-
-static void ub_request_fn(struct request_queue *q)
-{
-	struct ub_lun *lun = q->queuedata;
-	struct request *rq;
-
-	while ((rq = blk_peek_request(q)) != NULL) {
-		if (ub_request_fn_1(lun, rq) != 0) {
-			blk_stop_queue(q);
-			break;
-		}
-	}
-}
-
-static int ub_request_fn_1(struct ub_lun *lun, struct request *rq)
-{
-	struct ub_dev *sc = lun->udev;
-	struct ub_scsi_cmd *cmd;
-	struct ub_request *urq;
-	int n_elem;
-
-	if (atomic_read(&sc->poison)) {
-		blk_start_request(rq);
-		ub_end_rq(rq, DID_NO_CONNECT << 16);
-		return 0;
-	}
-
-	if (lun->changed && rq->cmd_type != REQ_TYPE_BLOCK_PC) {
-		blk_start_request(rq);
-		ub_end_rq(rq, SAM_STAT_CHECK_CONDITION);
-		return 0;
-	}
-
-	if (lun->urq.rq != NULL)
-		return -1;
-	if ((cmd = ub_get_cmd(lun)) == NULL)
-		return -1;
-	memset(cmd, 0, sizeof(struct ub_scsi_cmd));
-
-	blk_start_request(rq);
-
-	urq = &lun->urq;
-	memset(urq, 0, sizeof(struct ub_request));
-	urq->rq = rq;
-
-	/*
-	 * get scatterlist from block layer
-	 */
-	sg_init_table(&urq->sgv[0], UB_MAX_REQ_SG);
-	n_elem = blk_rq_map_sg(lun->disk->queue, rq, &urq->sgv[0]);
-	if (n_elem < 0) {
-		/* Impossible, because blk_rq_map_sg should not hit ENOMEM. */
-		printk(KERN_INFO "%s: failed request map (%d)\n",
-		    lun->name, n_elem);
-		goto drop;
-	}
-	if (n_elem > UB_MAX_REQ_SG) {	/* Paranoia */
-		printk(KERN_WARNING "%s: request with %d segments\n",
-		    lun->name, n_elem);
-		goto drop;
-	}
-	urq->nsg = n_elem;
-
-	if (rq->cmd_type == REQ_TYPE_BLOCK_PC) {
-		ub_cmd_build_packet(sc, lun, cmd, urq);
-	} else {
-		ub_cmd_build_block(sc, lun, cmd, urq);
-	}
-	cmd->state = UB_CMDST_INIT;
-	cmd->lun = lun;
-	cmd->done = ub_rw_cmd_done;
-	cmd->back = urq;
-
-	cmd->tag = sc->tagcnt++;
-	if (ub_submit_scsi(sc, cmd) != 0)
-		goto drop;
-
-	return 0;
-
-drop:
-	ub_put_cmd(lun, cmd);
-	ub_end_rq(rq, DID_ERROR << 16);
-	return 0;
-}
-
-static void ub_cmd_build_block(struct ub_dev *sc, struct ub_lun *lun,
-    struct ub_scsi_cmd *cmd, struct ub_request *urq)
-{
-	struct request *rq = urq->rq;
-	unsigned int block, nblks;
-
-	if (rq_data_dir(rq) == WRITE)
-		cmd->dir = UB_DIR_WRITE;
-	else
-		cmd->dir = UB_DIR_READ;
-
-	cmd->nsg = urq->nsg;
-	memcpy(cmd->sgv, urq->sgv, sizeof(struct scatterlist) * cmd->nsg);
-
-	/*
-	 * build the command
-	 *
-	 * The call to blk_queue_logical_block_size() guarantees that request
-	 * is aligned, but it is given in terms of 512 byte units, always.
-	 */
-	block = blk_rq_pos(rq) >> lun->capacity.bshift;
-	nblks = blk_rq_sectors(rq) >> lun->capacity.bshift;
-
-	cmd->cdb[0] = (cmd->dir == UB_DIR_READ)? READ_10: WRITE_10;
-	/* 10-byte uses 4 bytes of LBA: 2147483648KB, 2097152MB, 2048GB */
-	cmd->cdb[2] = block >> 24;
-	cmd->cdb[3] = block >> 16;
-	cmd->cdb[4] = block >> 8;
-	cmd->cdb[5] = block;
-	cmd->cdb[7] = nblks >> 8;
-	cmd->cdb[8] = nblks;
-	cmd->cdb_len = 10;
-
-	cmd->len = blk_rq_bytes(rq);
-}
-
-static void ub_cmd_build_packet(struct ub_dev *sc, struct ub_lun *lun,
-    struct ub_scsi_cmd *cmd, struct ub_request *urq)
-{
-	struct request *rq = urq->rq;
-
-	if (blk_rq_bytes(rq) == 0) {
-		cmd->dir = UB_DIR_NONE;
-	} else {
-		if (rq_data_dir(rq) == WRITE)
-			cmd->dir = UB_DIR_WRITE;
-		else
-			cmd->dir = UB_DIR_READ;
-	}
-
-	cmd->nsg = urq->nsg;
-	memcpy(cmd->sgv, urq->sgv, sizeof(struct scatterlist) * cmd->nsg);
-
-	memcpy(&cmd->cdb, rq->cmd, rq->cmd_len);
-	cmd->cdb_len = rq->cmd_len;
-
-	cmd->len = blk_rq_bytes(rq);
-
-	/*
-	 * To reapply this to every URB is not as incorrect as it looks.
-	 * In return, we avoid any complicated tracking calculations.
-	 */
-	cmd->timeo = rq->timeout;
-}
-
-static void ub_rw_cmd_done(struct ub_dev *sc, struct ub_scsi_cmd *cmd)
-{
-	struct ub_lun *lun = cmd->lun;
-	struct ub_request *urq = cmd->back;
-	struct request *rq;
-	unsigned int scsi_status;
-
-	rq = urq->rq;
-
-	if (cmd->error == 0) {
-		if (rq->cmd_type == REQ_TYPE_BLOCK_PC) {
-			if (cmd->act_len >= rq->resid_len)
-				rq->resid_len = 0;
-			else
-				rq->resid_len -= cmd->act_len;
-			scsi_status = 0;
-		} else {
-			if (cmd->act_len != cmd->len) {
-				scsi_status = SAM_STAT_CHECK_CONDITION;
-			} else {
-				scsi_status = 0;
-			}
-		}
-	} else {
-		if (rq->cmd_type == REQ_TYPE_BLOCK_PC) {
-			/* UB_SENSE_SIZE is smaller than SCSI_SENSE_BUFFERSIZE */
-			memcpy(rq->sense, sc->top_sense, UB_SENSE_SIZE);
-			rq->sense_len = UB_SENSE_SIZE;
-			if (sc->top_sense[0] != 0)
-				scsi_status = SAM_STAT_CHECK_CONDITION;
-			else
-				scsi_status = DID_ERROR << 16;
-		} else {
-			if (cmd->error == -EIO &&
-			    (cmd->key == 0 ||
-			     cmd->key == MEDIUM_ERROR ||
-			     cmd->key == UNIT_ATTENTION)) {
-				if (ub_rw_cmd_retry(sc, lun, urq, cmd) == 0)
-					return;
-			}
-			scsi_status = SAM_STAT_CHECK_CONDITION;
-		}
-	}
-
-	urq->rq = NULL;
-
-	ub_put_cmd(lun, cmd);
-	ub_end_rq(rq, scsi_status);
-	blk_start_queue(lun->disk->queue);
-}
-
-static void ub_end_rq(struct request *rq, unsigned int scsi_status)
-{
-	int error;
-
-	if (scsi_status == 0) {
-		error = 0;
-	} else {
-		error = -EIO;
-		rq->errors = scsi_status;
-	}
-	__blk_end_request_all(rq, error);
-}
-
-static int ub_rw_cmd_retry(struct ub_dev *sc, struct ub_lun *lun,
-    struct ub_request *urq, struct ub_scsi_cmd *cmd)
-{
-
-	if (atomic_read(&sc->poison))
-		return -ENXIO;
-
-	ub_reset_enter(sc, urq->current_try);
-
-	if (urq->current_try >= 3)
-		return -EIO;
-	urq->current_try++;
-
-	/* Remove this if anyone complains of flooding. */
-	printk(KERN_DEBUG "%s: dir %c len/act %d/%d "
-	    "[sense %x %02x %02x] retry %d\n",
-	    sc->name, UB_DIR_CHAR(cmd->dir), cmd->len, cmd->act_len,
-	    cmd->key, cmd->asc, cmd->ascq, urq->current_try);
-
-	memset(cmd, 0, sizeof(struct ub_scsi_cmd));
-	ub_cmd_build_block(sc, lun, cmd, urq);
-
-	cmd->state = UB_CMDST_INIT;
-	cmd->lun = lun;
-	cmd->done = ub_rw_cmd_done;
-	cmd->back = urq;
-
-	cmd->tag = sc->tagcnt++;
-
-#if 0 /* Wasteful */
-	return ub_submit_scsi(sc, cmd);
-#else
-	ub_cmdq_add(sc, cmd);
-	return 0;
-#endif
-}
-
-/*
- * Submit a regular SCSI operation (not an auto-sense).
- *
- * The Iron Law of Good Submit Routine is:
- * Zero return - callback is done, Nonzero return - callback is not done.
- * No exceptions.
- *
- * Host is assumed locked.
- */
-static int ub_submit_scsi(struct ub_dev *sc, struct ub_scsi_cmd *cmd)
-{
-
-	if (cmd->state != UB_CMDST_INIT ||
-	    (cmd->dir != UB_DIR_NONE && cmd->len == 0)) {
-		return -EINVAL;
-	}
-
-	ub_cmdq_add(sc, cmd);
-	/*
-	 * We can call ub_scsi_dispatch(sc) right away here, but it's a little
-	 * safer to jump to a tasklet, in case upper layers do something silly.
-	 */
-	tasklet_schedule(&sc->tasklet);
-	return 0;
-}
-
-/*
- * Submit the first URB for the queued command.
- * This function does not deal with queueing in any way.
- */
-static int ub_scsi_cmd_start(struct ub_dev *sc, struct ub_scsi_cmd *cmd)
-{
-	struct bulk_cb_wrap *bcb;
-	int rc;
-
-	bcb = &sc->work_bcb;
-
-	/*
-	 * ``If the allocation length is eighteen or greater, and a device
-	 * server returns less than eithteen bytes of data, the application
-	 * client should assume that the bytes not transferred would have been
-	 * zeroes had the device server returned those bytes.''
-	 *
-	 * We zero sense for all commands so that when a packet request
-	 * fails it does not return a stale sense.
-	 */
-	memset(&sc->top_sense, 0, UB_SENSE_SIZE);
-
-	/* set up the command wrapper */
-	bcb->Signature = cpu_to_le32(US_BULK_CB_SIGN);
-	bcb->Tag = cmd->tag;		/* Endianness is not important */
-	bcb->DataTransferLength = cpu_to_le32(cmd->len);
-	bcb->Flags = (cmd->dir == UB_DIR_READ) ? 0x80 : 0;
-	bcb->Lun = (cmd->lun != NULL) ? cmd->lun->num : 0;
-	bcb->Length = cmd->cdb_len;
-
-	/* copy the command payload */
-	memcpy(bcb->CDB, cmd->cdb, UB_MAX_CDB_SIZE);
-
-	UB_INIT_COMPLETION(sc->work_done);
-
-	sc->last_pipe = sc->send_bulk_pipe;
-	usb_fill_bulk_urb(&sc->work_urb, sc->dev, sc->send_bulk_pipe,
-	    bcb, US_BULK_CB_WRAP_LEN, ub_urb_complete, sc);
-
-	if ((rc = usb_submit_urb(&sc->work_urb, GFP_ATOMIC)) != 0) {
-		/* XXX Clear stalls */
-		ub_complete(&sc->work_done);
-		return rc;
-	}
-
-	sc->work_timer.expires = jiffies + UB_URB_TIMEOUT;
-	add_timer(&sc->work_timer);
-
-	cmd->state = UB_CMDST_CMD;
-	return 0;
-}
-
-/*
- * Timeout handler.
- */
-static void ub_urb_timeout(unsigned long arg)
-{
-	struct ub_dev *sc = (struct ub_dev *) arg;
-	unsigned long flags;
-
-	spin_lock_irqsave(sc->lock, flags);
-	if (!ub_is_completed(&sc->work_done))
-		usb_unlink_urb(&sc->work_urb);
-	spin_unlock_irqrestore(sc->lock, flags);
-}
-
-/*
- * Completion routine for the work URB.
- *
- * This can be called directly from usb_submit_urb (while we have
- * the sc->lock taken) and from an interrupt (while we do NOT have
- * the sc->lock taken). Therefore, bounce this off to a tasklet.
- */
-static void ub_urb_complete(struct urb *urb)
-{
-	struct ub_dev *sc = urb->context;
-
-	ub_complete(&sc->work_done);
-	tasklet_schedule(&sc->tasklet);
-}
-
-static void ub_scsi_action(unsigned long _dev)
-{
-	struct ub_dev *sc = (struct ub_dev *) _dev;
-	unsigned long flags;
-
-	spin_lock_irqsave(sc->lock, flags);
-	ub_scsi_dispatch(sc);
-	spin_unlock_irqrestore(sc->lock, flags);
-}
-
-static void ub_scsi_dispatch(struct ub_dev *sc)
-{
-	struct ub_scsi_cmd *cmd;
-	int rc;
-
-	while (!sc->reset && (cmd = ub_cmdq_peek(sc)) != NULL) {
-		if (cmd->state == UB_CMDST_DONE) {
-			ub_cmdq_pop(sc);
-			(*cmd->done)(sc, cmd);
-		} else if (cmd->state == UB_CMDST_INIT) {
-			if ((rc = ub_scsi_cmd_start(sc, cmd)) == 0)
-				break;
-			cmd->error = rc;
-			cmd->state = UB_CMDST_DONE;
-		} else {
-			if (!ub_is_completed(&sc->work_done))
-				break;
-			del_timer(&sc->work_timer);
-			ub_scsi_urb_compl(sc, cmd);
-		}
-	}
-}
-
-static void ub_scsi_urb_compl(struct ub_dev *sc, struct ub_scsi_cmd *cmd)
-{
-	struct urb *urb = &sc->work_urb;
-	struct bulk_cs_wrap *bcs;
-	int endp;
-	int len;
-	int rc;
-
-	if (atomic_read(&sc->poison)) {
-		ub_state_done(sc, cmd, -ENODEV);
-		return;
-	}
-
-	endp = usb_pipeendpoint(sc->last_pipe);
-	if (usb_pipein(sc->last_pipe))
-		endp |= USB_DIR_IN;
-
-	if (cmd->state == UB_CMDST_CLEAR) {
-		if (urb->status == -EPIPE) {
-			/*
-			 * STALL while clearning STALL.
-			 * The control pipe clears itself - nothing to do.
-			 */
-			printk(KERN_NOTICE "%s: stall on control pipe\n",
-			    sc->name);
-			goto Bad_End;
-		}
-
-		/*
-		 * We ignore the result for the halt clear.
-		 */
-
-		usb_reset_endpoint(sc->dev, endp);
-
-		ub_state_sense(sc, cmd);
-
-	} else if (cmd->state == UB_CMDST_CLR2STS) {
-		if (urb->status == -EPIPE) {
-			printk(KERN_NOTICE "%s: stall on control pipe\n",
-			    sc->name);
-			goto Bad_End;
-		}
-
-		/*
-		 * We ignore the result for the halt clear.
-		 */
-
-		usb_reset_endpoint(sc->dev, endp);
-
-		ub_state_stat(sc, cmd);
-
-	} else if (cmd->state == UB_CMDST_CLRRS) {
-		if (urb->status == -EPIPE) {