[PATCH 3.12 045/146] drm/radeon/si: make sure mc ucode is loaded before checking the size

[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]

 



From: Alex Deucher <alexdeucher@xxxxxxxxx>

3.12-stable review patch.  If anyone has any objections, please let me know.

===============

commit 8c79bae6a30f606b7a4e17c994bc5f72f8fdaf11 upstream.

Avoid a possible segfault.

Noticed-by: Dan Carpenter <dan.carpenter@xxxxxxxxxx>
Signed-off-by: Alex Deucher <alexander.deucher@xxxxxxx>
Signed-off-by: Jiri Slaby <jslaby@xxxxxxx>
---
 drivers/gpu/drm/radeon/si.c | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/drivers/gpu/drm/radeon/si.c b/drivers/gpu/drm/radeon/si.c
index de0c2bfcc7fc..bbd83f5aa75d 100644
--- a/drivers/gpu/drm/radeon/si.c
+++ b/drivers/gpu/drm/radeon/si.c
@@ -1475,11 +1475,13 @@ static int si_mc_load_microcode(struct radeon_device *rdev)
 	const __be32 *fw_data;
 	u32 running, blackout = 0;
 	u32 *io_mc_regs;
-	int i, regs_size, ucode_size = rdev->mc_fw->size / 4;
+	int i, regs_size, ucode_size;
 
 	if (!rdev->mc_fw)
 		return -EINVAL;
 
+	ucode_size = rdev->mc_fw->size / 4;
+
 	switch (rdev->family) {
 	case CHIP_TAHITI:
 		io_mc_regs = (u32 *)&tahiti_io_mc_regs;
-- 
1.9.3

--
To unsubscribe from this list: send the line "unsubscribe stable" in
the body of a message to majordomo@xxxxxxxxxxxxxxx
More majordomo info at  http://vger.kernel.org/majordomo-info.html




[Index of Archives]     [Linux Kernel]     [Kernel Development Newbies]     [Linux USB Devel]     [Video for Linux]     [Linux Audio Users]     [Yosemite Hiking]     [Linux Kernel]     [Linux SCSI]