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video: driver: add fix to avoid race condition in session close

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Some clients attempt to invoke streamoff & driver fd close
(msm_vidc_close) sequence concurrently. So there might be chances
some commands willbe posted to command queue even after closing
hfi session(HFI_CMD_CLOSE) completed. So due to invalid session_id
firmware asserts.

Added change to avoid above mentioned issue and also amended minor
logging changes.

Change-Id: I2896567916cf5d18eb5b2a148efccf9bf07af3ea
Signed-off-by: Govindaraj Rajagopal <grajagop@codeaurora.org>
This commit is contained in:
Govindaraj Rajagopal
2021-04-15 19:54:24 +05:30
parent 9635a177c9
commit 3d6ff3ea8e
5 changed files with 35 additions and 28 deletions
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33
driver/vidc/src/msm_vidc_driver.c
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@@ -1009,9 +1009,9 @@ int msm_vidc_change_core_state(struct msm_vidc_core *core,
return -EINVAL;
}
d_vpr_h("%s: core state changed from %s to %s\n",
func, core_state_name(core->state),
core_state_name(request_state));
d_vpr_h("%s: core state changed to %s from %s\n",
func, core_state_name(request_state),
core_state_name(core->state));
core->state = request_state;
return 0;
}
@@ -1036,9 +1036,15 @@ int msm_vidc_change_inst_state(struct msm_vidc_inst *inst,
return 0;
}
i_vpr_h(inst, "%s: state changed from %s to %s\n",
func, state_name(inst->state), state_name(request_state));
if (request_state == MSM_VIDC_ERROR)
i_vpr_e(inst, "%s: state changed to %s from %s\n",
func, state_name(request_state), state_name(inst->state));
else
i_vpr_h(inst, "%s: state changed to %s from %s\n",
func, state_name(request_state), state_name(inst->state));
inst->state = request_state;
return 0;
}
@@ -1864,7 +1870,7 @@ int msm_vidc_process_readonly_buffers(struct msm_vidc_inst *inst,
list_for_each_entry_safe(ro_buf, dummy, &ro_buffers->list, list) {
if (ro_buf->device_addr == buf->device_addr) {
buf->attr |= MSM_VIDC_ATTR_READ_ONLY;
print_vidc_buffer(VIDC_LOW, "low", "ro buf removed", inst, ro_buf);
print_vidc_buffer(VIDC_LOW, "low ", "ro buf removed", inst, ro_buf);
list_del(&ro_buf->list);
msm_vidc_put_vidc_buffer(inst, ro_buf);
break;
@@ -2609,7 +2615,7 @@ int msm_vidc_queue_buffer_single(struct msm_vidc_inst *inst, struct vb2_buffer *
i_vpr_e(inst, "%s: qbuf not allowed\n", __func__);
return -EINVAL;
} else if (allow == MSM_VIDC_DEFER) {
print_vidc_buffer(VIDC_LOW, "high", "qbuf deferred", inst, buf);
print_vidc_buffer(VIDC_LOW, "low ", "qbuf deferred", inst, buf);
return 0;
}
@@ -3389,6 +3395,11 @@ int msm_vidc_session_close(struct msm_vidc_inst *inst)
if (rc)
return rc;
/* we are not supposed to send any more commands after close */
i_vpr_h(inst, "%s: free session packet data\n", __func__);
kfree(inst->packet);
inst->packet = NULL;
core = inst->core;
i_vpr_h(inst, "%s: wait on close for time: %d ms\n",
__func__, core->capabilities[HW_RESPONSE_TIMEOUT].value);
@@ -3409,10 +3420,6 @@ int msm_vidc_session_close(struct msm_vidc_inst *inst)
msm_vidc_remove_session(inst);
i_vpr_h(inst, "%s: free session packet data\n", __func__);
kfree(inst->packet);
inst->packet = NULL;
return rc;
}
@@ -4173,13 +4180,13 @@ void msm_vidc_destroy_buffers(struct msm_vidc_inst *inst)
}
list_for_each_entry_safe(buf, dummy, &inst->buffers.read_only.list, list) {
print_vidc_buffer(VIDC_ERR, "err", "destroying ro buffer", inst, buf);
print_vidc_buffer(VIDC_ERR, "err ", "destroying ro buffer", inst, buf);
list_del(&buf->list);
msm_vidc_put_vidc_buffer(inst, buf);
}
list_for_each_entry_safe(buf, dummy, &inst->buffers.release.list, list) {
print_vidc_buffer(VIDC_ERR, "err", "destroying release buffer", inst, buf);
print_vidc_buffer(VIDC_ERR, "err ", "destroying release buffer", inst, buf);
list_del(&buf->list);
msm_vidc_put_vidc_buffer(inst, buf);
}