[PATCH] media: atomisp: csi2-bridge: check for negative port values

[Dan Carpenter <dan.carpenter@xxxxxxxxxx>]

The atomisp_csi2_get_port() function reads an integer value from the
firmware.  We check for invalid positive values but we should also
check for negatives.

Fixes: 8d28ec7e9145 ("media: atomisp: Add support for v4l2-async sensor registration")
Signed-off-by: Dan Carpenter <dan.carpenter@xxxxxxxxxx>
---
 drivers/staging/media/atomisp/pci/atomisp_csi2_bridge.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/staging/media/atomisp/pci/atomisp_csi2_bridge.c b/drivers/staging/media/atomisp/pci/atomisp_csi2_bridge.c
index 46d9f31986c9..0f0ec5d7e49d 100644
--- a/drivers/staging/media/atomisp/pci/atomisp_csi2_bridge.c
+++ b/drivers/staging/media/atomisp/pci/atomisp_csi2_bridge.c
@@ -626,7 +626,7 @@ static int atomisp_csi2_connect_sensor(const struct atomisp_csi2_sensor_config *
 			goto err_put_adev;
 
 		sensor->port = atomisp_csi2_get_port(adev, clock_num);
-		if (sensor->port >= ATOMISP_CAMERA_NR_PORTS) {
+		if (sensor->port < 0 || sensor->port >= ATOMISP_CAMERA_NR_PORTS) {
 			acpi_handle_err(adev->handle, "Invalid port: %d\n", sensor->port);
 			ret = -EINVAL;
 			goto err_put_adev;
-- 
2.39.2