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drm/radeon/ci: make sure mc ucode is loaded before checking the size

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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
This commit is contained in:
Alex Deucher 2014-04-16 09:42:23 -04:00 committed by Christian König
parent 8c79bae6a3
commit bcddee29b0
1 changed files with 3 additions and 1 deletions
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4
drivers/gpu/drm/radeon/cik.c
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@ -1705,11 +1705,13 @@ int ci_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_BONAIRE:
io_mc_regs = (u32 *)&bonaire_io_mc_regs;