msm: camera: fix preview hang issue when recording is stopped

During stream off, user-space context turns off stream specific
write masters and waits for the ack triggered from next reg update.
But due to incorrect state maintenance this ack never reaches the
waiting context. Fix this by using proper state checks.

Change-Id: Ibd73ebb8c6b57d15ad38ee98a7198e353242d426
Signed-off-by: Ujwal Patel <ujwalp@codeaurora.org>

drivers/media/video/msmb/isp/msm_isp_axi_util.c

@@ -625,7 +625,7 @@ void msm_isp_axi_stream_update(struct vfe_device *vfe_dev)
 	int i;
 	struct msm_vfe_axi_shared_data *axi_data = &vfe_dev->axi_data;
 	uint32_t wm_reload_mask = 0x0, reg_update_mask = 0x1;
-	int send_update_complete = 0;
+
 	for (i = 0; i < MAX_NUM_STREAM; i++) {
 		if (axi_data->stream_info[i].state == START_PENDING ||
 				axi_data->stream_info[i].state ==
@@ -635,9 +635,6 @@ void msm_isp_axi_stream_update(struct vfe_device *vfe_dev)
 				&wm_reload_mask, &reg_update_mask);
 			if (axi_data->stream_info[i].state == STOP_PENDING)
 				axi_data->stream_info[i].state = STOPPING;
-		} else if (axi_data->stream_info[i].state == STOPPING) {
-			send_update_complete = 1;
-			axi_data->stream_info[i].state = INACTIVE;
 		}
 	}
 	/*Reload AXI*/
@@ -646,7 +643,8 @@ void msm_isp_axi_stream_update(struct vfe_device *vfe_dev)
 	/*Reg update per src*/
 	vfe_dev->hw_info->vfe_ops.core_ops.
 		reg_update(vfe_dev, reg_update_mask);
-	if (send_update_complete) {
+
+	if (vfe_dev->axi_data.stream_update) {
 		ISP_DBG("%s: send update complete\n", __func__);
 		vfe_dev->axi_data.stream_update = 0;
 		complete(&vfe_dev->stream_config_complete);