Merge "msm: camera: mem: Remove lock from get_cpu_buf unless mapping" into dev/msm-4.14-camx (a134943c) · Commits · e / devices / android_kernel_xiaomi_nabu

drivers/media/platform/msm/camera/cam_req_mgr/cam_mem_mgr.c

+20 −15

Original line number	Diff line number	Diff line
		@@ -244,37 +244,42 @@ int cam_mem_get_cpu_buf(int32_t buf_handle, uint64_t vaddr_ptr, size_t len)
		if (!tbl.bufq[idx].active)
		return -EPERM;

		mutex_lock(&tbl.bufq[idx].q_lock);
		if (buf_handle != tbl.bufq[idx].buf_handle) {
		rc = -EINVAL;
		goto exit_func;
		}

		if (!(tbl.bufq[idx].flags & CAM_MEM_FLAG_KMD_ACCESS)) {
		rc = -EINVAL;
		goto exit_func;
		}

		if (!tbl.bufq[idx].kmdvaddr) {
		mutex_lock(&tbl.bufq[idx].q_lock);
		dmabuf = tbl.bufq[idx].dma_buf;
		if (!dmabuf) {
		CAM_ERR(CAM_MEM, "Invalid DMA buffer pointer");
		rc = -EINVAL;
		goto exit_func;
		goto release_mutex;
		}

		if (tbl.bufq[idx].flags & CAM_MEM_FLAG_KMD_ACCESS) {
		if (!tbl.bufq[idx].kmdvaddr) {
		rc = cam_mem_util_map_cpu_va(dmabuf,
		&kvaddr, &klen);
		if (rc)
		goto exit_func;
		goto release_mutex;

		tbl.bufq[idx].kmdvaddr = kvaddr;
		}
		} else {
		rc = -EINVAL;
		goto exit_func;
		mutex_unlock(&tbl.bufq[idx].q_lock);
		}

		*vaddr_ptr = tbl.bufq[idx].kmdvaddr;
		*len = tbl.bufq[idx].len;

		exit_func:
		return rc;

		release_mutex:
		mutex_unlock(&tbl.bufq[idx].q_lock);
		exit_func:
		return rc;
		}
		EXPORT_SYMBOL(cam_mem_get_cpu_buf);