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staging: dwc2: check for null pointer before dereferencing it 

We were testing qtd->urb pointer for null after we had already
dereferenced it

Reported-by: Dan Carpenter <dan.carpenter@oracle.com>
Signed-off-by: Paul Zimmerman <paulz@synopsys.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Paul Zimmerman 2013-04-22 14:00:18 -07:00 committed by Greg Kroah-Hartman
parent de9169a1e0
commit 7902c16b9a
1 changed files with 5 additions and 6 deletions
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11
drivers/staging/dwc2/hcd_intr.c
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@ -1377,13 +1377,12 @@ static void dwc2_hc_nyet_intr(struct dwc2_hsotg *hsotg,
hsotg->core_params->dma_enable > 0) {
qtd->complete_split = 0;
qtd->isoc_split_offset = 0;
if (++qtd->isoc_frame_index == qtd->urb->packet_count) {
if (qtd->urb)
dwc2_host_complete(hsotg,
qtd->urb->priv,
qtd->urb, 0);
if (qtd->urb &&
++qtd->isoc_frame_index == qtd->urb->packet_count) {
dwc2_host_complete(hsotg, qtd->urb->priv,
qtd->urb, 0);
dwc2_release_channel(hsotg, chan, qtd,
DWC2_HC_XFER_URB_COMPLETE);
DWC2_HC_XFER_URB_COMPLETE);
} else {
dwc2_release_channel(hsotg, chan, qtd,
DWC2_HC_XFER_NO_HALT_STATUS);