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usb: host: xhci-mtk: avoid runtime suspend when removing hcd

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When runtime suspend was enabled, runtime suspend might happen
when xhci is removing hcd. This might cause kernel panic when hcd
has been freed but runtime pm suspend related handle need to
reference it.

Signed-off-by: Macpaul Lin <macpaul.lin@mediatek.com>
Reviewed-by: Chunfeng Yun <chunfeng.yun@mediatek.com>
Cc: stable@vger.kernel.org
Signed-off-by: Mathias Nyman <mathias.nyman@linux.intel.com>
Link: https://lore.kernel.org/r/20200624135949.22611-4-mathias.nyman@linux.intel.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Macpaul Lin 2020-06-24 16:59:47 +03:00 committed by Greg Kroah-Hartman
parent a73d9d9cfc
commit a24d5072e8
1 changed files with 3 additions and 2 deletions
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5
drivers/usb/host/xhci-mtk.c
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@ -587,6 +587,9 @@ static int xhci_mtk_remove(struct platform_device *dev)
struct xhci_hcd *xhci = hcd_to_xhci(hcd);
struct usb_hcd *shared_hcd = xhci->shared_hcd;
pm_runtime_put_noidle(&dev->dev);
pm_runtime_disable(&dev->dev);
usb_remove_hcd(shared_hcd);
xhci->shared_hcd = NULL;
device_init_wakeup(&dev->dev, false);
@ -597,8 +600,6 @@ static int xhci_mtk_remove(struct platform_device *dev)
xhci_mtk_sch_exit(mtk);
xhci_mtk_clks_disable(mtk);
xhci_mtk_ldos_disable(mtk);
pm_runtime_put_sync(&dev->dev);
pm_runtime_disable(&dev->dev);
return 0;
}