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drm/radeon: gcc fixes for rv6xx dpm

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Newer versions of gcc seem to wander off into the
weeds when dealing with variable sizes arrays in
structs.  Rather than indexing the arrays, use
pointer arithmetic.

See bugs:
https://bugs.freedesktop.org/show_bug.cgi?id=66932
https://bugs.freedesktop.org/show_bug.cgi?id=66972
https://bugs.freedesktop.org/show_bug.cgi?id=66945

Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
This commit is contained in:
Alex Deucher 2013-08-20 18:47:07 -04:00
parent 607f2c2791
commit aa842d736e
1 changed files with 3 additions and 2 deletions
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5
drivers/gpu/drm/radeon/rv6xx_dpm.c
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@ -1918,6 +1918,7 @@ static int rv6xx_parse_power_table(struct radeon_device *rdev)
(power_state->v1.ucNonClockStateIndex *
power_info->pplib.ucNonClockSize));
if (power_info->pplib.ucStateEntrySize - 1) {
u8 *idx;
ps = kzalloc(sizeof(struct rv6xx_ps), GFP_KERNEL);
if (ps == NULL) {
kfree(rdev->pm.dpm.ps);
@ -1926,12 +1927,12 @@ static int rv6xx_parse_power_table(struct radeon_device *rdev)
rdev->pm.dpm.ps[i].ps_priv = ps;
rv6xx_parse_pplib_non_clock_info(rdev, &rdev->pm.dpm.ps[i],
non_clock_info);
idx = (u8 *)&power_state->v1.ucClockStateIndices[0];
for (j = 0; j < (power_info->pplib.ucStateEntrySize - 1); j++) {
clock_info = (union pplib_clock_info *)
(mode_info->atom_context->bios + data_offset +
le16_to_cpu(power_info->pplib.usClockInfoArrayOffset) +
(power_state->v1.ucClockStateIndices[j] *
power_info->pplib.ucClockInfoSize));
(idx[j] * power_info->pplib.ucClockInfoSize));
rv6xx_parse_pplib_clock_info(rdev,
&rdev->pm.dpm.ps[i], j,
clock_info);