MLK-22506: VPU Decoder: fix mutex may not unlock if v4l2_open fail

there is an bug in v4l2_open,
that the dev_mutex may be not unlock in some flow,
it'll cause dead lock.

Signed-off-by: ming_qian <ming.qian@nxp.com>
Reviewed-by: Shijie Qin <shijie.qin@nxp.com>

diff --git a/drivers/mxc/vpu_malone/vpu_b0.c b/drivers/mxc/vpu_malone/vpu_b0.c
index 12f5a8b..9d3155b 100644 (file)
--- a/drivers/mxc/vpu_malone/vpu_b0.c
+++ b/drivers/mxc/vpu_malone/vpu_b0.c
@@ -5837,6 +5837,7 @@ static int v4l2_open(struct file *filp)
                        if (!wait_for_completion_timeout(&ctx->dev->start_cmp, msecs_to_jiffies(10000))) {
                                vpu_err("error: don't get start interrupt\n");
                                ret = -1;
+                               mutex_unlock(&dev->dev_mutex);
                                goto err_firmware_load;
                        }
                }