diff mbox series

[2/4] drm/amdgpu: Fix signedness bug in __amdgpu_eeprom_xfer()

Message ID YOAxmdgHju990Wbd@mwanda (mailing list archive)
State New, archived
Headers show
Series [1/4] drm/amdgpu: fix a signedness bug in __verify_ras_table_checksum() | expand

Commit Message

Dan Carpenter July 3, 2021, 9:44 a.m. UTC 
The i2c_transfer() function returns negatives or else the number of
messages transferred.  This code does not work because ARRAY_SIZE()
is type size_t and so that means negative values of "r" are type
promoted to high positive values which are greater than the ARRAY_SIZE().

Fix this by changing the < to != which works regardless of type
promotion.

Fixes: 6cda0af81a50 ("drm/amdgpu: Fixes to the AMDGPU EEPROM driver")
Signed-off-by: Dan Carpenter <dan.carpenter@oracle.com>
---
 drivers/gpu/drm/amd/amdgpu/amdgpu_eeprom.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)
diff mbox series

Patch

diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_eeprom.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_eeprom.c
index 4c3c65a5acae..4d9eb0137f8c 100644
--- a/drivers/gpu/drm/amd/amdgpu/amdgpu_eeprom.c
+++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_eeprom.c
@@ -147,7 +147,7 @@  static int __amdgpu_eeprom_xfer(struct i2c_adapter *i2c_adap, u32 eeprom_addr,
 		/* This constitutes a START-STOP transaction.
 		 */
 		r = i2c_transfer(i2c_adap, msgs, ARRAY_SIZE(msgs));
-		if (r < ARRAY_SIZE(msgs))
+		if (r != ARRAY_SIZE(msgs))
 			break;
 
 		if (!read) {