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drm/radeon: gcc fixes for ci 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 19:08:22 -04:00
parent 53f3b25287
commit b309ed9867
1 changed files with 5 additions and 2 deletions
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7
drivers/gpu/drm/radeon/ci_dpm.c
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@ -4931,6 +4931,7 @@ static int ci_parse_power_table(struct radeon_device *rdev)
rdev->pm.dpm.backbias_response_time = le16_to_cpu(power_info->pplib.usBackbiasTime);
rdev->pm.dpm.voltage_response_time = le16_to_cpu(power_info->pplib.usVoltageTime);
for (i = 0; i < state_array->ucNumEntries; i++) {
u8 *idx;
power_state = (union pplib_power_state *)power_state_offset;
non_clock_array_index = power_state->v2.nonClockInfoIndex;
non_clock_info = (struct _ATOM_PPLIB_NONCLOCK_INFO *)
@ -4947,14 +4948,16 @@ static int ci_parse_power_table(struct radeon_device *rdev)
non_clock_info,
non_clock_info_array->ucEntrySize);
k = 0;
idx = (u8 *)&power_state->v2.clockInfoIndex[0];
for (j = 0; j < power_state->v2.ucNumDPMLevels; j++) {
clock_array_index = power_state->v2.clockInfoIndex[j];
clock_array_index = idx[j];
if (clock_array_index >= clock_info_array->ucNumEntries)
continue;
if (k >= CISLANDS_MAX_HARDWARE_POWERLEVELS)
break;
clock_info = (union pplib_clock_info *)
&clock_info_array->clockInfo[clock_array_index * clock_info_array->ucEntrySize];
((u8 *)&clock_info_array->clockInfo[0] +
(clock_array_index * clock_info_array->ucEntrySize));
ci_parse_pplib_clock_info(rdev,
&rdev->pm.dpm.ps[i], k,
clock_info);