staging: drm/imx: check return value of ipu_reset()

ipu_reset() can fail with a timeout. Check the return value and act
appropriately.

Signed-off-by: Lothar Waßmann <LW@KARO-electronics.de>
Acked-by: Sascha Hauer <s.hauer@pengutronix.de>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

1 files changed, 4 insertions, 1 deletions

diff --git a/drivers/staging/imx-drm/ipu-v3/ipu-common.c b/drivers/staging/imx-drm/ipu-v3/ipu-common.c
index 677e665ca86d..f7059cddd7fd 100644
--- a/drivers/staging/imx-drm/ipu-v3/ipu-common.c
+++ b/drivers/staging/imx-drm/ipu-v3/ipu-common.c
@@ -1104,7 +1104,9 @@ static int ipu_probe(struct platform_device *pdev)
         if (ret)
                 goto out_failed_irq;
 
-        ipu_reset(ipu);
+        ret = ipu_reset(ipu);
+        if (ret)
+                goto out_failed_reset;
 
         /* Set MCU_T to divide MCU access window into 2 */
         ipu_cm_write(ipu, 0x00400000L | (IPU_MCU_T_DEFAULT << 18),
@@ -1129,6 +1131,7 @@ failed_add_clients:
         ipu_submodules_exit(ipu);
 failed_submodules_init:
         ipu_irq_exit(ipu);
+out_failed_reset:
 out_failed_irq:
         clk_disable_unprepare(ipu->clk);
 failed_clk_get: