[PATCH] video: fbdev: lcd_mipid: Fix a memory leak in an error handling path

From: Christophe JAILLET
Date: Sat May 08 2021 - 16:24:04 EST


If 'mipid_detect()' fails, we must free 'md' to avoid a memory leak.

While at it, modernize the function:
- remove a useless message in case of memory allocation failure
- change a '== NULL' into a '!'

Fixes: 66d2f99d0bb5 ("omapfb: add support for MIPI-DCS compatible LCDs")
Signed-off-by: Christophe JAILLET <christophe.jaillet@xxxxxxxxxx>
---
drivers/video/fbdev/omap/lcd_mipid.c | 10 ++++++----
1 file changed, 6 insertions(+), 4 deletions(-)

diff --git a/drivers/video/fbdev/omap/lcd_mipid.c b/drivers/video/fbdev/omap/lcd_mipid.c
index a75ae0c9b14c..b4b93ff4b41a 100644
--- a/drivers/video/fbdev/omap/lcd_mipid.c
+++ b/drivers/video/fbdev/omap/lcd_mipid.c
@@ -551,10 +551,8 @@ static int mipid_spi_probe(struct spi_device *spi)
int r;

md = kzalloc(sizeof(*md), GFP_KERNEL);
- if (md == NULL) {
- dev_err(&spi->dev, "out of memory\n");
+ if (!md)
return -ENOMEM;
- }

spi->mode = SPI_MODE_0;
md->spi = spi;
@@ -563,11 +561,15 @@ static int mipid_spi_probe(struct spi_device *spi)

r = mipid_detect(md);
if (r < 0)
- return r;
+ goto free_md;

omapfb_register_panel(&md->panel);

return 0;
+
+free_md:
+ kfree(md);
+ return r;
}

static int mipid_spi_remove(struct spi_device *spi)
--
2.30.2