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| author | Alexandru M Stan <amstan@chromium.org> | 2019-10-23 14:06:31 -0700 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2020-01-15 10:39:20 +0100 |
| commit | 7b8137676457d99181fb2952f0b996b8569e6420 (patch) | |
| tree | ae331e607caf94c851071cc352516b53bd083fc1 /drivers/usb/dwc2 | |
| parent | 6070636c4918c3c06e54edecdb323c8b57116768 (diff) | |
| download | linux-7b8137676457d99181fb2952f0b996b8569e6420.tar.gz linux-7b8137676457d99181fb2952f0b996b8569e6420.tar.bz2 linux-7b8137676457d99181fb2952f0b996b8569e6420.zip | |
usb: dwc2: Fix NULL qh in dwc2_queue_transaction
When a usb device disconnects in a certain way, dwc2_queue_transaction
still gets called after dwc2_hcd_cleanup_channels.
dwc2_hcd_cleanup_channels does "channel->qh = NULL;" but
dwc2_queue_transaction still wants to dereference qh.
This adds a check for a null qh.
Acked-by: Minas Harutyunyan <hminas@synopsys.com>
Signed-off-by: Alexandru M Stan <amstan@chromium.org>
[dianders: rebased to mainline]
Signed-off-by: Douglas Anderson <dianders@chromium.org>
Signed-off-by: Felipe Balbi <felipe.balbi@linux.intel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'drivers/usb/dwc2')
| -rw-r--r-- | drivers/usb/dwc2/hcd.c | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/drivers/usb/dwc2/hcd.c b/drivers/usb/dwc2/hcd.c index 81afe553aa66..b90f858af960 100644 --- a/drivers/usb/dwc2/hcd.c +++ b/drivers/usb/dwc2/hcd.c @@ -2824,7 +2824,7 @@ static int dwc2_queue_transaction(struct dwc2_hsotg *hsotg, list_move_tail(&chan->split_order_list_entry, &hsotg->split_order); - if (hsotg->params.host_dma) { + if (hsotg->params.host_dma && chan->qh) { if (hsotg->params.dma_desc_enable) { if (!chan->xfer_started || chan->ep_type == USB_ENDPOINT_XFER_ISOC) { |