[PATCH v2] GPU:DRM: returning ENOMEM

[F.A.Sulaiman]

check the return value and pass the proper error code.

Signed-off-by: F.A. SULAIMAN <asha...@itfac.mrt.ac.lk>
---
 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