Protect from concurrent SMU accesses.
Signed-off-by: Andrey Grodzovsky <[email protected]>
---
drivers/gpu/drm/amd/powerplay/amd_powerplay.c | 7 ++++++-
1 file changed, 6 insertions(+), 1 deletion(-)
diff --git a/drivers/gpu/drm/amd/powerplay/amd_powerplay.c
b/drivers/gpu/drm/amd/powerplay/amd_powerplay.c
index fa636cb..fa8ad7d 100644
--- a/drivers/gpu/drm/amd/powerplay/amd_powerplay.c
+++ b/drivers/gpu/drm/amd/powerplay/amd_powerplay.c
@@ -1531,6 +1531,7 @@ static int pp_asic_reset_mode_2(void *handle)
static int pp_smu_i2c_bus_access(void *handle, bool acquire)
{
struct pp_hwmgr *hwmgr = handle;
+ int ret = 0;
if (!hwmgr || !hwmgr->pm_en)
return -EINVAL;
@@ -1540,7 +1541,11 @@ static int pp_smu_i2c_bus_access(void *handle, bool
acquire)
return -EINVAL;
}
- return hwmgr->hwmgr_func->smu_i2c_bus_access(hwmgr, acquire);
+ mutex_lock(&hwmgr->smu_lock);
+ ret = hwmgr->hwmgr_func->smu_i2c_bus_access(hwmgr, acquire);
+ mutex_unlock(&hwmgr->smu_lock);
+
+ return ret;
}
static const struct amd_pm_funcs pp_dpm_funcs = {
--
2.7.4
_______________________________________________
amd-gfx mailing list
[email protected]
https://lists.freedesktop.org/mailman/listinfo/amd-gfx
