Minki/linux
1
0
Fork 1
mirror of https://github.com/torvalds/linux.git synced 2024-12-25 04:11:49 +00:00
Code Issues Packages Projects Releases Wiki Activity

usb: musb: only restore devctl when session was set in backup

Browse Source 
If the session bit was not set in the backup of devctl register,
restoring devctl would clear the session bit. Therefor, only restore
devctl register when the session bit was set in the backup.

This solves the device enumeration failure in otg mode exposed by commit
56f487c (PM / Runtime: Update last_busy in rpm_resume).

Cc: <stable@vger.kernel.org> # v4.2+
Signed-off-by: Bin Liu <b-liu@ti.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Bin Liu 2016-05-31 10:05:24 -05:00 committed by Greg Kroah-Hartman
parent b6a619a883
commit 84ac5d1140
1 changed files with 2 additions and 1 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

3
drivers/usb/musb/musb_core.c
View File

@ -2418,7 +2418,8 @@ static void musb_restore_context(struct musb *musb)
musb_writew(musb_base, MUSB_INTRTXE, musb->intrtxe);
musb_writew(musb_base, MUSB_INTRRXE, musb->intrrxe);
musb_writeb(musb_base, MUSB_INTRUSBE, musb->context.intrusbe);
musb_writeb(musb_base, MUSB_DEVCTL, musb->context.devctl);
if (musb->context.devctl & MUSB_DEVCTL_SESSION)
musb_writeb(musb_base, MUSB_DEVCTL, musb->context.devctl);
for (i = 0; i < musb->config->num_eps; ++i) {
struct musb_hw_ep *hw_ep;