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drm/amd/pm: Fix a bug in semaphore double-lock

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Fix a bug in smu_cmn_send_msg_without_waiting() in
that this function does not need to take the
smu->message_lock mutex in order to send a message
down to the SMU. The mutex is acquired by the
caller of this function instead.

Cc: Alex Deucher <Alexander.Deucher@amd.com>
Cc: Changfeng Zhu <Changfeng.Zhu@amd.com>
Cc: Huang Rui <ray.huang@amd.com>
Fixes: 5810323ba6 ("drm/amd/pm: Fix a bug communicating with the SMU (v5)")
Signed-off-by: Luben Tuikov <luben.tuikov@amd.com>
Reviewed-by: Alex Deucher <Alexander.Deucher@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
This commit is contained in:
Luben Tuikov 2021-07-28 11:07:03 -04:00 committed by Alex Deucher
parent b8e42844b4
commit 544dcd74b7
1 changed files with 0 additions and 2 deletions
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2
drivers/gpu/drm/amd/pm/swsmu/smu_cmn.c
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@ -259,7 +259,6 @@ int smu_cmn_send_msg_without_waiting(struct smu_context *smu,
if (smu->adev->no_hw_access)
return 0;
mutex_lock(&smu->message_lock);
reg = __smu_cmn_poll_stat(smu);
res = __smu_cmn_reg2errno(smu, reg);
if (reg == SMU_RESP_NONE ||
@ -269,7 +268,6 @@ int smu_cmn_send_msg_without_waiting(struct smu_context *smu,
__smu_cmn_send_msg(smu, msg_index, param);
res = 0;
Out:
mutex_unlock(&smu->message_lock);
return res;
}