[coreboot-gerrit] Change in coreboot[master]: soc/nvidia/tegra210: Add null pointer check

[Patrick Georgi (Code Review)]

Patrick Georgi has submitted this change and it was merged. ( https://review.coreboot.org/c/coreboot/+/34530 )

Change subject: soc/nvidia/tegra210: Add null pointer check
......................................................................

soc/nvidia/tegra210: Add null pointer check

Check that tx is not null before accessing it, similar to the previous
if statements.

Change-Id: I820cb670026bb12a54c63227aa04e778fd49c66a
Signed-off-by: Jacob Garber 
Found-by: Coverity CID 1294805
Reviewed-on: https://review.coreboot.org/c/coreboot/+/34530
Tested-by: build bot (Jenkins) 
Reviewed-by: Julius Werner 
Reviewed-by: Paul Menzel 
---
M src/soc/nvidia/tegra210/dsi.c
1 file changed, 1 insertion(+), 1 deletion(-)

Approvals:
  build bot (Jenkins): Verified
  Paul Menzel: Looks good to me, but someone else must approve
  Julius Werner: Looks good to me, approved

diff --git a/src/soc/nvidia/tegra210/dsi.c b/src/soc/nvidia/tegra210/dsi.c
index ae20d44..a383ff2 100644
--- a/src/soc/nvidia/tegra210/dsi.c
+++ b/src/soc/nvidia/tegra210/dsi.c
@@ -769,7 +769,7 @@
    tegra_dsi_writel(dsi, value, DSI_WR_DATA);

/* write payload (if any) */
-	if (msg->tx_len > 2) {
+	if (tx && msg->tx_len > 2) {
    	for (j = 2; j < msg->tx_len; j += 4) {
    		value = 0;