Commit 2b54fa6b authored by Paul Zimmerman's avatar Paul Zimmerman Committed by Greg Kroah-Hartman

usb: dwc2: fix dereference before NULL check

In a couple of places, we were checking qtd->urb for NULL after
we had already dereferenced it. Fix this by moving the check to
before the dereference.
Signed-off-by: default avatarPaul Zimmerman <paulz@synopsys.com>
Signed-off-by: default avatarGreg Kroah-Hartman <gregkh@linuxfoundation.org>
parent 0f94388b
......@@ -975,8 +975,8 @@ static void dwc2_hc_xfercomp_intr(struct dwc2_hsotg *hsotg,
struct dwc2_qtd *qtd)
{
struct dwc2_hcd_urb *urb = qtd->urb;
int pipe_type = dwc2_hcd_get_pipe_type(&urb->pipe_info);
enum dwc2_halt_status halt_status = DWC2_HC_XFER_COMPLETE;
int pipe_type;
int urb_xfer_done;
if (dbg_hc(chan))
......@@ -984,6 +984,11 @@ static void dwc2_hc_xfercomp_intr(struct dwc2_hsotg *hsotg,
"--Host Channel %d Interrupt: Transfer Complete--\n",
chnum);
if (!urb)
goto handle_xfercomp_done;
pipe_type = dwc2_hcd_get_pipe_type(&urb->pipe_info);
if (hsotg->core_params->dma_desc_enable > 0) {
dwc2_hcd_complete_xfer_ddma(hsotg, chan, chnum, halt_status);
if (pipe_type == USB_ENDPOINT_XFER_ISOC)
......@@ -1005,9 +1010,6 @@ static void dwc2_hc_xfercomp_intr(struct dwc2_hsotg *hsotg,
}
}
if (!urb)
goto handle_xfercomp_done;
/* Update the QTD and URB states */
switch (pipe_type) {
case USB_ENDPOINT_XFER_CONTROL:
......@@ -1105,7 +1107,7 @@ static void dwc2_hc_stall_intr(struct dwc2_hsotg *hsotg,
struct dwc2_qtd *qtd)
{
struct dwc2_hcd_urb *urb = qtd->urb;
int pipe_type = dwc2_hcd_get_pipe_type(&urb->pipe_info);
int pipe_type;
dev_dbg(hsotg->dev, "--Host Channel %d Interrupt: STALL Received--\n",
chnum);
......@@ -1119,6 +1121,8 @@ static void dwc2_hc_stall_intr(struct dwc2_hsotg *hsotg,
if (!urb)
goto handle_stall_halt;
pipe_type = dwc2_hcd_get_pipe_type(&urb->pipe_info);
if (pipe_type == USB_ENDPOINT_XFER_CONTROL)
dwc2_host_complete(hsotg, qtd, -EPIPE);
......
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