From: Alex Deucher Date: Tue, 20 Aug 2013 23:02:14 +0000 (-0400) Subject: drm/radeon: gcc fixes for trinity dpm X-Git-Tag: firefly_0821_release~176^2~5263^2~27^2~7 X-Git-Url: http://demsky.eecs.uci.edu/git/?a=commitdiff_plain;h=5e250d20c2b6ed0c5d1f3632c266eba4a7f979ba;p=firefly-linux-kernel-4.4.55.git drm/radeon: gcc fixes for trinity dpm 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 --- diff --git a/drivers/gpu/drm/radeon/trinity_dpm.c b/drivers/gpu/drm/radeon/trinity_dpm.c index a1eb5f59939f..b07b7b8f1aff 100644 --- a/drivers/gpu/drm/radeon/trinity_dpm.c +++ b/drivers/gpu/drm/radeon/trinity_dpm.c @@ -1675,6 +1675,7 @@ static int trinity_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 *) @@ -1688,14 +1689,16 @@ static int trinity_parse_power_table(struct radeon_device *rdev) } rdev->pm.dpm.ps[i].ps_priv = ps; 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 >= SUMO_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)); trinity_parse_pplib_clock_info(rdev, &rdev->pm.dpm.ps[i], k, clock_info);