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| author | Alan Stern <stern@rowland.harvard.edu> | 2013-05-14 13:55:29 -0400 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2013-06-07 12:49:12 -0700 |
| commit | ee4998cca0218751458709c0db61d258adb6a86d (patch) | |
| tree | bd8b3c68bc01897a1ee4a089cc74055144649730 /fs | |
| parent | 99d96e8cd47fddbe3170339889440d44181a6f03 (diff) | |
| download | lwn-ee4998cca0218751458709c0db61d258adb6a86d.tar.gz lwn-ee4998cca0218751458709c0db61d258adb6a86d.zip | |
USB: UHCI: fix for suspend of virtual HP controller
commit 997ff893603c6455da4c5e26ba1d0f81adfecdfc upstream.
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>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'fs')
0 files changed, 0 insertions, 0 deletions