V4L/DVB (9602): dvb-ttusb-budget: Add NULL pointer validation

Added validation for NULL pointer

Signed-off-by: Douglas Schilling Landgraf <dougsland@linuxtv.org>
Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>

1 files changed, 6 insertions, 0 deletions

diff --git a/drivers/media/dvb/ttusb-budget/dvb-ttusb-budget.c b/drivers/media/dvb/ttusb-budget/dvb-ttusb-budget.c
index 66ab0c6e9783..5faeee3f70bf 100644
--- a/drivers/media/dvb/ttusb-budget/dvb-ttusb-budget.c
+++ b/drivers/media/dvb/ttusb-budget/dvb-ttusb-budget.c
@@ -808,6 +808,12 @@ static int ttusb_alloc_iso_urbs(struct ttusb *ttusb)
                                                  ISO_BUF_COUNT,
                                                  &ttusb->iso_dma_handle);
 
+        if (!ttusb->iso_buffer) {
+                dprintk("%s: pci_alloc_consistent - not enough memory\n",
+                        __func__);
+                return -ENOMEM;
+        }
+
         memset(ttusb->iso_buffer, 0,
                ISO_FRAME_SIZE * FRAMES_PER_ISO_BUF * ISO_BUF_COUNT);