diff options
| author | Paul Zimmerman <Paul.Zimmerman@synopsys.com> | 2014-02-12 17:44:35 -0800 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2014-02-15 12:26:14 -0800 |
| commit | 2b54fa6bbef4dbc0beabcc989625204b608d062d (patch) | |
| tree | 533d01d33fceebfd4dde0c241a003416cf7944fe /drivers | |
| parent | 0f94388b27c599015b74eedf1a32126a3f5fc0f9 (diff) | |
| download | linux-2b54fa6bbef4dbc0beabcc989625204b608d062d.tar.gz linux-2b54fa6bbef4dbc0beabcc989625204b608d062d.tar.bz2 linux-2b54fa6bbef4dbc0beabcc989625204b608d062d.zip | |
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: Paul Zimmerman <paulz@synopsys.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'drivers')
| -rw-r--r-- | drivers/usb/dwc2/hcd_intr.c | 14 |
1 files changed, 9 insertions, 5 deletions
diff --git a/drivers/usb/dwc2/hcd_intr.c b/drivers/usb/dwc2/hcd_intr.c index 012f17ec1a37..47b9eb5389b4 100644 --- a/drivers/usb/dwc2/hcd_intr.c +++ b/drivers/usb/dwc2/hcd_intr.c @@ -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); |