Minki/linux
1
0
Fork 1
mirror of https://github.com/torvalds/linux.git synced 2024-11-15 08:31:55 +00:00
Code Issues Packages Projects Releases Wiki Activity

spi: Fix NULL pointer when setting SPI_CS_HIGH for GPIO CS

Browse Source 
Even if the flag use_gpio_descriptors is set, it is possible that
cs_gpiods was not allocated, which leads to a kernel crash.

Reported-by: "kernelci.org bot" <bot@kernelci.org>
Fixes: 3e5ec1db8b ("spi: Fix SPI_CS_HIGH setting when using native and GPIO CS")
Signed-off-by: Gregory CLEMENT <gregory.clement@bootlin.com>
Link: https://lore.kernel.org/r/20191024141309.22434-1-gregory.clement@bootlin.com
Signed-off-by: Mark Brown <broonie@kernel.org>
Cc: <stable@vger.kernel.org>
This commit is contained in:
Gregory CLEMENT 2019-10-24 16:13:09 +02:00 committed by Mark Brown
parent 77c544d243
commit 15f794bd97
No known key found for this signature in database
GPG Key ID: 24D68B725D5487D0
1 changed files with 2 additions and 1 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

3
drivers/spi/spi.c
View File

@ -1780,7 +1780,8 @@ static int of_spi_parse_dt(struct spi_controller *ctlr, struct spi_device *spi,
* handled in the gpiolib, so all gpio chip selects are "active high"
* in the logical sense, the gpiolib will invert the line if need be.
*/
if ((ctlr->use_gpio_descriptors) && ctlr->cs_gpiods[spi->chip_select])
if ((ctlr->use_gpio_descriptors) && ctlr->cs_gpiods &&
ctlr->cs_gpiods[spi->chip_select])
spi->mode |= SPI_CS_HIGH;
/* Device speed */