@@ -2089,9 +2089,15 @@ static int stm32_spi_probe(struct platform_device *pdev)
struct resource *res;
struct reset_control *rst;
struct device_node *np = pdev->dev.of_node;
+ const struct stm32_spi_cfg *cfg;
bool device_mode;
int ret;
- const struct stm32_spi_cfg *cfg = of_device_get_match_data(&pdev->dev);
+
+ cfg = of_device_get_match_data(&pdev->dev);
+ if (!cfg) {
+ dev_err(&pdev->dev, "Failed to get match data for platform\n");
+ return -ENODEV;
+ }
device_mode = of_property_read_bool(np, "spi-slave");
if (!cfg->has_device_mode && device_mode) {
The stm32_spi_probe function now includes a check to ensure that the pointer returned by of_device_get_match_data is not NULL before accessing its members. This resolves a warning where a potential NULL pointer dereference could occur when accessing cfg->has_device_mode. Before accessing the 'has_device_mode' member, we verify that 'cfg' is not NULL. If 'cfg' is NULL, an error message is logged. This change ensures that the driver does not attempt to access configuration data if it is not available, thus preventing a potential system crash due to a NULL pointer dereference. Signed-off-by: Clément Le Goffic <clement.legoffic@foss.st.com> Reported-by: kernel test robot <lkp@intel.com> Closes: https://lore.kernel.org/oe-kbuild-all/202310191831.MLwx1c6x-lkp@intel.com/ Fixes: fee681646fc8 ("spi: stm32: disable device mode with st,stm32f4-spi compatible") --- drivers/spi/spi-stm32.c | 8 +++++++- 1 file changed, 7 insertions(+), 1 deletion(-)