diff options
| author | Dmitry Torokhov <dmitry.torokhov@gmail.com> | 2020-06-09 21:38:24 -0700 |
|---|---|---|
| committer | Jiri Kosina <jkosina@suse.cz> | 2020-06-16 17:12:57 +0200 |
| commit | d3132792285859253c466354fd8d54d1fe0ba786 (patch) | |
| tree | eb80a20285237e6284e92fc5f546fde046e39f5d /drivers/hid/usbhid/usbhid.h | |
| parent | a789d5f8a99a366778a6e42b3700a246244201a6 (diff) | |
HID: usbhid: do not sleep when opening device
usbhid tries to give the device 50 milliseconds to drain its queues when
opening the device, but does it naively by simply sleeping in open handler,
which slows down device probing (and thus may affect overall boot time).
However we do not need to sleep as we can instead mark a point of time in
the future when we should start processing the events.
Reported-by: Nicolas Boichat <drinkcat@chromium.org>
Signed-off-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>
Reviewed-by: Guenter Roeck <groeck@chromium.org>
Signed-off-by: Jiri Kosina <jkosina@suse.cz>
Diffstat (limited to 'drivers/hid/usbhid/usbhid.h')
| -rw-r--r-- | drivers/hid/usbhid/usbhid.h | 2 |
1 files changed, 2 insertions, 0 deletions
diff --git a/drivers/hid/usbhid/usbhid.h b/drivers/hid/usbhid/usbhid.h index 75fe85d3d27a..c6ad684d099a 100644 --- a/drivers/hid/usbhid/usbhid.h +++ b/drivers/hid/usbhid/usbhid.h @@ -13,6 +13,7 @@ #include <linux/types.h> #include <linux/slab.h> +#include <linux/ktime.h> #include <linux/list.h> #include <linux/mutex.h> #include <linux/timer.h> @@ -83,6 +84,7 @@ struct usbhid_device { struct mutex mutex; /* start/stop/open/close */ spinlock_t lock; /* fifo spinlock */ unsigned long iofl; /* I/O flags (CTRL_RUNNING, OUT_RUNNING) */ + ktime_t input_start_time; /* When to start handling input */ struct timer_list io_retry; /* Retry timer */ unsigned long stop_retry; /* Time to give up, in jiffies */ unsigned int retry_delay; /* Delay length in ms */ |