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usb: host: ehci-msm: Conditionally call ehci suspend/resume

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This patch fixes a suspend/resume issue where the driver is blindly
calling ehci_suspend/resume functions when the ehci hasn't been setup.
This results in a crash during suspend/resume operations.

Signed-off-by: Andy Gross <andy.gross@linaro.org>
Tested-by: Pramod Gurav <pramod.gurav@linaro.org>
Acked-by: Alan Stern <stern@rowland.harvard.edu>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Andy Gross 2016-05-20 16:35:07 -05:00 committed by Greg Kroah-Hartman
parent 1700bd9872
commit 815c9d6a3c
1 changed files with 12 additions and 2 deletions
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14
drivers/usb/host/ehci-msm.c
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@ -179,22 +179,32 @@ static int ehci_msm_remove(struct platform_device *pdev)
static int ehci_msm_pm_suspend(struct device *dev)
{
struct usb_hcd *hcd = dev_get_drvdata(dev);
struct ehci_hcd *ehci = hcd_to_ehci(hcd);
bool do_wakeup = device_may_wakeup(dev);
dev_dbg(dev, "ehci-msm PM suspend\n");
return ehci_suspend(hcd, do_wakeup);
/* Only call ehci_suspend if ehci_setup has been done */
if (ehci->sbrn)
return ehci_suspend(hcd, do_wakeup);
return 0;
}
static int ehci_msm_pm_resume(struct device *dev)
{
struct usb_hcd *hcd = dev_get_drvdata(dev);
struct ehci_hcd *ehci = hcd_to_ehci(hcd);
dev_dbg(dev, "ehci-msm PM resume\n");
ehci_resume(hcd, false);
/* Only call ehci_resume if ehci_setup has been done */
if (ehci->sbrn)
ehci_resume(hcd, false);
return 0;
}
#else
#define ehci_msm_pm_suspend NULL
#define ehci_msm_pm_resume NULL