# \[PATCH 2/2\] video: exynos\_mipi\_dsi: Fix potential NULL pointer dereference

- From: Sachin Kamat \<hidden\>
- Date: 2012-09-18 11:50:00 
- List: linux-fbdev
- Page: https://ratatoskr.run/linux-fbdev/2012/09/13463865
- Thread: https://ratatoskr.run/linux-fbdev/2012/09/13463865/t.md

```text
The error message printed when dsim is NULL references its member.
This will cause NULL pointer derefernce error. Hence change dev_err
to pr_err to avoid it.

Signed-off-by: Sachin Kamat <redacted>
---
 drivers/video/exynos/exynos_mipi_dsi_common.c |    2 +-
 1 files changed, 1 insertions(+), 1 deletions(-)

diff --git a/drivers/video/exynos/exynos_mipi_dsi_common.c b/drivers/video/exynos/exynos_mipi_dsi_common.c
index 7cc4113..4fc64c4 100644
--- a/drivers/video/exynos/exynos_mipi_dsi_common.c
+++ b/drivers/video/exynos/exynos_mipi_dsi_common.c
@@ -80,7 +80,7 @@ irqreturn_t exynos_mipi_dsi_interrupt_handler(int irq, void *dev_id)
 	unsigned int intsrc, intmsk;
 
 	if (dsim = NULL) {
-		dev_err(dsim->dev, "%s: wrong parameter\n", __func__);
+		pr_err("%s: wrong parameter\n", __func__);
 		return IRQ_NONE;
 	}
 
-- 
1.7.4.1

```