drm/radeon/si: make sure mc ucode is loaded before checking the size
authorAlex Deucher <alexdeucher@gmail.com>
Wed, 16 Apr 2014 13:42:22 +0000 (09:42 -0400)
committerChristian König <christian.koenig@amd.com>
Thu, 17 Apr 2014 12:14:41 +0000 (14:14 +0200)
Avoid a possible segfault.

Noticed-by: Dan Carpenter <dan.carpenter@oracle.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
Cc: stable@vger.kernel.org
drivers/gpu/drm/radeon/si.c

index 86f8c9c87f5cf951a14c89207238466c94efb556..ac708e006180d3467cfe0478c2484eeb64a2df68 100644 (file)
@@ -1472,11 +1472,13 @@ 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;