Commit 815c9d6a authored by Andy Gross's avatar Andy Gross Committed by Greg Kroah-Hartman

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

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: default avatarAndy Gross <andy.gross@linaro.org>
Tested-by: default avatarPramod Gurav <pramod.gurav@linaro.org>
Acked-by: default avatarAlan Stern <stern@rowland.harvard.edu>
Signed-off-by: default avatarGreg Kroah-Hartman <gregkh@linuxfoundation.org>
parent 1700bd98
...@@ -179,22 +179,32 @@ static int ehci_msm_remove(struct platform_device *pdev) ...@@ -179,22 +179,32 @@ static int ehci_msm_remove(struct platform_device *pdev)
static int ehci_msm_pm_suspend(struct device *dev) static int ehci_msm_pm_suspend(struct device *dev)
{ {
struct usb_hcd *hcd = dev_get_drvdata(dev); struct usb_hcd *hcd = dev_get_drvdata(dev);
struct ehci_hcd *ehci = hcd_to_ehci(hcd);
bool do_wakeup = device_may_wakeup(dev); bool do_wakeup = device_may_wakeup(dev);
dev_dbg(dev, "ehci-msm PM suspend\n"); 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) static int ehci_msm_pm_resume(struct device *dev)
{ {
struct usb_hcd *hcd = dev_get_drvdata(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"); 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; return 0;
} }
#else #else
#define ehci_msm_pm_suspend NULL #define ehci_msm_pm_suspend NULL
#define ehci_msm_pm_resume NULL #define ehci_msm_pm_resume NULL
......
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