android/android_kernel_asus_sm8350
1
0
Fork 0
Code Issues Pull Requests Actions Packages Projects Releases Wiki Activity

usb: usleep_range is preferred over udelay where wakeup is flexible

Browse Source 
According to Documentation/timers/timers-howto.txt"
udelay() is only called once from a place where sleeping is allowed.
We can replace it with a call to usleep_range()
with a reasonable upper limit.

Signed-off-by: Sunny Kumar <sunny.kumar.roy@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Sunny Kumar
2015-07-07 12:27:03 +05:30
committed by Greg Kroah-Hartman
parent 655fe4effe
commit e616b39a16
1 changed files with 1 additions and 1 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

2
drivers/usb/storage/transport.c
View File

@ -1111,7 +1111,7 @@ int usb_stor_Bulk_transport(struct scsi_cmnd *srb, struct us_data *us)
* command phase and the data phase. Some devices need a little * command phase and the data phase. Some devices need a little
* more than that, probably because of clock rate inaccuracies. */ * more than that, probably because of clock rate inaccuracies. */
if (unlikely(us->fflags & US_FL_GO_SLOW)) if (unlikely(us->fflags & US_FL_GO_SLOW))
udelay(125); usleep_range(125, 150);
if (transfer_length) { if (transfer_length) {
unsigned int pipe = srb->sc_data_direction == DMA_FROM_DEVICE ? unsigned int pipe = srb->sc_data_direction == DMA_FROM_DEVICE ?