spi: sh-sci: Prevent NULL pointer dereference
If sp->info is NULL, we will hit NULL pointer dereference in probe() while
setting bus_num and num_chipselect for master:
sp->bitbang.master->bus_num = sp->info->bus_num;
sp->bitbang.master->num_chipselect = sp->info->num_chipselect;
Thus add NULL test for sp->info in probe() to prevent NULL pointer dereference.
Signed-off-by: Axel Lin <axel.lin@ingics.com>
Reviewed-by: Geert Uytterhoeven <geert@linux-m68k.org>
Signed-off-by: Mark Brown <broonie@linaro.org>
diff --git a/drivers/spi/spi-sh-sci.c b/drivers/spi/spi-sh-sci.c
index 38eb24d..41b1346b 100644
--- a/drivers/spi/spi-sh-sci.c
+++ b/drivers/spi/spi-sh-sci.c
@@ -109,7 +109,7 @@
{
struct sh_sci_spi *sp = spi_master_get_devdata(dev->master);
- if (sp->info && sp->info->chip_select)
+ if (sp->info->chip_select)
(sp->info->chip_select)(sp->info, dev->chip_select, value);
}
@@ -131,6 +131,11 @@
platform_set_drvdata(dev, sp);
sp->info = dev_get_platdata(&dev->dev);
+ if (!sp->info) {
+ dev_err(&dev->dev, "platform data is missing\n");
+ ret = -ENOENT;
+ goto err1;
+ }
/* setup spi bitbang adaptor */
sp->bitbang.master = master;