check the return value and pass the proper error code.
Signed-off-by: F.A. SULAIMAN <asha.16@xxxxxxxxxxxxxxx>
---
drivers/gpu/drm/udl/udl_connector.c | 11 ++++++++---
1 file changed, 8 insertions(+), 3 deletions(-)
diff --git a/drivers/gpu/drm/udl/udl_connector.c b/drivers/gpu/drm/udl/udl_connector.c
index cdc1c42e1669..857d2c97ef0e 100644
--- a/drivers/gpu/drm/udl/udl_connector.c
+++ b/drivers/gpu/drm/udl/udl_connector.c
@@ -23,7 +23,7 @@ static int udl_get_edid_block(void *data, u8 *buf, unsigned int block,
read_buff = kmalloc(2, GFP_KERNEL);
if (!read_buff)
- return -1;
+ return -ENOMEM;
for (i = 0; i < len; i++) {
int bval = (i + block * EDID_LENGTH) << 8;
@@ -31,11 +31,16 @@ static int udl_get_edid_block(void *data, u8 *buf, unsigned int block,
usb_rcvctrlpipe(udl->udev, 0),
(0x02), (0x80 | (0x02 << 5)), bval,
0xA1, read_buff, 2, HZ);
- if (ret < 1) {
+ if (ret == 0) {
+ DRM_ERROR("Reading EDID block %d returned empty result\n", i);
+ kfree(read_buff);
+ return -EINVAL;
+ } else if (ret < 0) {
DRM_ERROR("Read EDID byte %d failed err %x\n", i, ret);
kfree(read_buff);
- return -1;
+ return ret;
}
+
buf[i] = read_buff[1];
}
--
2.17.1
