diff options
| author |   Weitao Wango <WeitaoWang-oc@zhaoxin.com> | 2022-03-24 20:17:35 +0800 |
|---|---|---|
| committer |   Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2022-04-21 18:53:53 +0200 |
| commit | f085bd4bfe0907ce2fad2c787fc65871ec5ca6d6 (patch) | |
| tree | 77617e99a6b76fb214b5dd767c35c9efa2010540 /drivers/usb/host/ehci.h | |
| parent | usb: typec: tcpm: Fix undefined behavior due to shift overflowing the constant (diff) | |
| download | linux-dev-f085bd4bfe0907ce2fad2c787fc65871ec5ca6d6.tar.xz linux-dev-f085bd4bfe0907ce2fad2c787fc65871ec5ca6d6.zip | |
USB: Fix ehci infinite suspend-resume loop issue in zhaoxin
In zhaoxin platform, some ehci projects will latch a wakeup signal
internal when plug in a device on port during system S0. This wakeup
signal will turn on when ehci runtime suspend, which will trigger a
system control interrupt that will resume ehci back to D0. As no
device connect, ehci will be set to runtime suspend and turn on the
internal latched wakeup signal again. It will cause a suspend-resume
loop and generate system control interrupt continuously.
Fixed this issue by clear wakeup signal latched in ehci internal when
ehci resume callback is called.
Acked-by: Alan Stern <stern@rowland.harvard.edu>
Signed-off-by: Weitao Wang <WeitaoWang-oc@zhaoxin.com>
Link: https://lore.kernel.org/r/20220324121735.3803-1-WeitaoWang-oc@zhaoxin.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'drivers/usb/host/ehci.h')
| -rw-r--r-- | drivers/usb/host/ehci.h | 1 |
1 files changed, 1 insertions, 0 deletions
diff --git a/drivers/usb/host/ehci.h b/drivers/usb/host/ehci.h index fdd073cc053b..ad3f13a3eaf1 100644 --- a/drivers/usb/host/ehci.h +++ b/drivers/usb/host/ehci.h @@ -220,6 +220,7 @@ struct ehci_hcd { /* one per controller */ unsigned imx28_write_fix:1; /* For Freescale i.MX28 */ unsigned spurious_oc:1; unsigned is_aspeed:1; + unsigned zx_wakeup_clear_needed:1; /* required for usb32 quirk */ #define OHCI_CTRL_HCFS (3 << 6) |