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

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commit a24d5072e87457a14023ee1dd3fc8b1e76f899ef upstream.

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 Sasha Levin
commit 9d814bd14c
1 changed files with 3 additions and 2 deletions
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5
drivers/usb/host/xhci-mtk.c
View file

@ -592,6 +592,9 @@ 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);
@ -602,8 +605,6 @@ 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;
}