Patch 'b8efdaf USB: EHCI: add check for wakeup/suspend race'
adds a check for possible race between suspend and wakeup interrupt,
and thereby it returns -EBUSY as error code if there's a wakeup
interrupt.
So the platform host controller should not proceed further with
its suspend callback, rather should return immediately to avoid
powering down the essential things, like phy.
Signed-off-by: Vivek Gautam <gautam.vi...@samsung.com>
Cc: Alan Stern <st...@rowland.harvard.edu>
Cc: Hauke Mehrtens <ha...@hauke-m.de>
Cc: Hans de Goede <hdego...@redhat.com>
---
Changes from v1:
-- Removed unnecessary change 'return 0'
drivers/usb/host/ehci-platform.c | 2 ++
1 file changed, 2 insertions(+)
diff --git a/drivers/usb/host/ehci-platform.c b/drivers/usb/host/ehci-platform.c
index b3a0e11..c7dd93a 100644
--- a/drivers/usb/host/ehci-platform.c
+++ b/drivers/usb/host/ehci-platform.c
@@ -303,6 +303,8 @@ static int ehci_platform_suspend(struct device *dev)
int ret;
ret = ehci_suspend(hcd, do_wakeup);
+ if (ret)
+ return ret;
if (pdata->power_suspend)
pdata->power_suspend(pdev);
--
1.7.10.4
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