diff options
| author | Gregory Herrero <gregory.herrero@intel.com> | 2015-04-29 22:09:20 +0200 |
|---|---|---|
| committer | Felipe Balbi <balbi@ti.com> | 2015-04-29 15:20:22 -0500 |
| commit | e499123ed780df64a35e6cc0a8c892b282fa71a4 (patch) | |
| tree | a82e71fdfa54fcbe31f42162e9aba8ea77d9308c | |
| parent | 285046aa11ad85a4de24891f5458d45f50d1bcc5 (diff) | |
usb: dwc2: host: ensure qtb exists before dereferencing it
dwc2_hc_nak_intr could be called with a NULL qtd.
Ensure qtd exists before dereferencing it to avoid kernel panic.
This happens when using usb to ethernet adapter.
Acked-by: John Youn <johnyoun@synopsys.com>
Signed-off-by: Gregory Herrero <gregory.herrero@intel.com>
Signed-off-by: Felipe Balbi <balbi@ti.com>
| -rw-r--r-- | drivers/usb/dwc2/hcd_intr.c | 10 |
1 files changed, 10 insertions, 0 deletions
diff --git a/drivers/usb/dwc2/hcd_intr.c b/drivers/usb/dwc2/hcd_intr.c index 6ea8eb6899f4..4cc95df4262d 100644 --- a/drivers/usb/dwc2/hcd_intr.c +++ b/drivers/usb/dwc2/hcd_intr.c @@ -1208,6 +1208,16 @@ static void dwc2_hc_nak_intr(struct dwc2_hsotg *hsotg, struct dwc2_host_chan *chan, int chnum, struct dwc2_qtd *qtd) { + if (!qtd) { + dev_dbg(hsotg->dev, "%s: qtd is NULL\n", __func__); + return; + } + + if (!qtd->urb) { + dev_dbg(hsotg->dev, "%s: qtd->urb is NULL\n", __func__); + return; + } + if (dbg_hc(chan)) dev_vdbg(hsotg->dev, "--Host Channel %d Interrupt: NAK Received--\n", chnum); |