diff options
| author | Chunfeng Yun <chunfeng.yun@mediatek.com> | 2020-09-21 14:13:30 +0800 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2020-09-25 16:30:05 +0200 |
| commit | e7d8263bdd5c6a4f5de3652b4d96c1af24963be4 (patch) | |
| tree | c6950b1d77aea283623cd1e810384c02498abf80 /drivers/usb/host | |
| parent | d43a69018e256b51265fa8f66f01f9fa94b6f0bb (diff) | |
usb: fotg210-hcd: convert to readl_poll_timeout_atomic()
Use readl_poll_timeout_atomic() to simplify code
Signed-off-by: Chunfeng Yun <chunfeng.yun@mediatek.com>
Link: https://lore.kernel.org/r/1600668815-12135-6-git-send-email-chunfeng.yun@mediatek.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'drivers/usb/host')
| -rw-r--r-- | drivers/usb/host/fotg210-hcd.c | 20 |
1 files changed, 9 insertions, 11 deletions
diff --git a/drivers/usb/host/fotg210-hcd.c b/drivers/usb/host/fotg210-hcd.c index 194df8282471..1d94fcfac2c2 100644 --- a/drivers/usb/host/fotg210-hcd.c +++ b/drivers/usb/host/fotg210-hcd.c @@ -32,6 +32,7 @@ #include <linux/uaccess.h> #include <linux/platform_device.h> #include <linux/io.h> +#include <linux/iopoll.h> #include <linux/clk.h> #include <asm/byteorder.h> @@ -883,18 +884,15 @@ static int handshake(struct fotg210_hcd *fotg210, void __iomem *ptr, u32 mask, u32 done, int usec) { u32 result; + int ret; - do { - result = fotg210_readl(fotg210, ptr); - if (result == ~(u32)0) /* card removed */ - return -ENODEV; - result &= mask; - if (result == done) - return 0; - udelay(1); - usec--; - } while (usec > 0); - return -ETIMEDOUT; + ret = readl_poll_timeout_atomic(ptr, result, + ((result & mask) == done || + result == U32_MAX), 1, usec); + if (result == U32_MAX) /* card removed */ + return -ENODEV; + + return ret; } /* Force HC to halt state from unknown (EHCI spec section 2.3). |