Messages in this thread Patch in this message | | | From | Vivek Gautam <> | Subject | [PATCH v2 1/2] usb: ehci-exynos: Return immediately from suspend if ehci_suspend fails | Date | Thu, 10 Apr 2014 15:58:01 +0530 |
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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.vivek@samsung.com> Acked-by: Jingoo Han <jg1.han@samsung.com> Cc: Alan Stern <stern@rowland.harvard.edu> ---
Changes from v1: -- Removed unnecessary change 'return 0'
drivers/usb/host/ehci-exynos.c | 2 ++ 1 file changed, 2 insertions(+)
diff --git a/drivers/usb/host/ehci-exynos.c b/drivers/usb/host/ehci-exynos.c index d1d8c47..7f425ac 100644 --- a/drivers/usb/host/ehci-exynos.c +++ b/drivers/usb/host/ehci-exynos.c @@ -212,6 +212,8 @@ static int exynos_ehci_suspend(struct device *dev) int rc; rc = ehci_suspend(hcd, do_wakeup); + if (rc) + return rc; if (exynos_ehci->otg) exynos_ehci->otg->set_host(exynos_ehci->otg, &hcd->self); -- 1.7.10.4
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