mirror of
https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
synced 2024-09-05 10:29:37 +00:00
USB: UHCI: fix for suspend of virtual HP controller
HP's virtual UHCI host controller takes a long time to suspend (several hundred microseconds), even when no devices are attached. This provokes a warning message from uhci-hcd in the auto-stop case. To prevent this from happening, this patch adds a test to avoid performing an auto-stop when the wait_for_hp quirk flag is set. The controller will still suspend through the normal runtime PM mechanism. And since that pathway includes a 1-ms delay, the slowness of the virtual hardware won't matter. Signed-off-by: Alan Stern <stern@rowland.harvard.edu> Reported-and-tested-by: ZhenHua <zhen-hual@hp.com> CC: <stable@vger.kernel.org> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
parent
ccd9509a0b
commit
997ff89360
1 changed files with 2 additions and 1 deletions
|
@ -225,7 +225,8 @@ static int uhci_hub_status_data(struct usb_hcd *hcd, char *buf)
|
|||
/* auto-stop if nothing connected for 1 second */
|
||||
if (any_ports_active(uhci))
|
||||
uhci->rh_state = UHCI_RH_RUNNING;
|
||||
else if (time_after_eq(jiffies, uhci->auto_stop_time))
|
||||
else if (time_after_eq(jiffies, uhci->auto_stop_time) &&
|
||||
!uhci->wait_for_hp)
|
||||
suspend_rh(uhci, UHCI_RH_AUTO_STOPPED);
|
||||
break;
|
||||
|
||||
|
|
Loading…
Reference in a new issue