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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>
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@ -1208,6 +1208,16 @@ static void dwc2_hc_nak_intr(struct dwc2_hsotg *hsotg,
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struct dwc2_host_chan *chan, int chnum,
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struct dwc2_qtd *qtd)
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{
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if (!qtd) {
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dev_dbg(hsotg->dev, "%s: qtd is NULL\n", __func__);
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return;
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}
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if (!qtd->urb) {
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dev_dbg(hsotg->dev, "%s: qtd->urb is NULL\n", __func__);
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return;
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}
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if (dbg_hc(chan))
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dev_vdbg(hsotg->dev, "--Host Channel %d Interrupt: NAK Received--\n",
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chnum);
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