diff options
| author | Chunfeng Yun <chunfeng.yun@mediatek.com> | 2021-03-31 16:25:42 +0800 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2021-04-02 15:56:33 +0200 |
| commit | f351f4b63dac127079bbd77da64b2a61c09d522d (patch) | |
| tree | 1c5be07595660397e627f24dcf80896654416562 /drivers/usb | |
| parent | d8fca036ef6d5c7e93157edeab614c8cd2758e90 (diff) | |
| download | linux-f351f4b63dac127079bbd77da64b2a61c09d522d.tar.gz | |
usb: xhci-mtk: fix oops when unbind driver
The oops happens when unbind driver through sysfs as following,
because xhci_mtk_drop_ep() try to drop the endpoint of root hub
which is not added by xhci_add_endpoint() and the virtual device
is not allocated, in fact also needn't drop it, so should skip it.
Call trace:
xhci_mtk_drop_ep+0x1b8/0x298
usb_hcd_alloc_bandwidth+0x1d8/0x380
usb_disable_device_endpoints+0x8c/0xe0
usb_disable_device+0x128/0x168
usb_disconnect+0xbc/0x2c8
usb_remove_hcd+0xd8/0x210
xhci_mtk_remove+0x98/0x108
platform_remove+0x28/0x60
device_release_driver_internal+0x110/0x1e8
device_driver_detach+0x18/0x28
unbind_store+0xd4/0x108
drv_attr_store+0x24/0x38
Fixes: 14295a150050 ("usb: xhci-mtk: support to build xhci-mtk-hcd.ko")
Reported-by: Eddie Hung <eddie.hung@mediatek.com>
Signed-off-by: Chunfeng Yun <chunfeng.yun@mediatek.com>
Link: https://lore.kernel.org/r/1617179142-2681-2-git-send-email-chunfeng.yun@mediatek.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'drivers/usb')
| -rw-r--r-- | drivers/usb/host/xhci-mtk-sch.c | 4 |
1 files changed, 3 insertions, 1 deletions
diff --git a/drivers/usb/host/xhci-mtk-sch.c b/drivers/usb/host/xhci-mtk-sch.c index 7ac76ae28998..8b90da5a6ed1 100644 --- a/drivers/usb/host/xhci-mtk-sch.c +++ b/drivers/usb/host/xhci-mtk-sch.c @@ -872,6 +872,8 @@ int xhci_mtk_drop_ep(struct usb_hcd *hcd, struct usb_device *udev, if (ret) return ret; - drop_ep_quirk(hcd, udev, ep); + if (ep->hcpriv) + drop_ep_quirk(hcd, udev, ep); + return 0; } |