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| author | Axel Lin <axel.lin@ingics.com> | 2014-03-13 10:32:37 +0800 |
|---|---|---|
| committer | Mark Brown <broonie@linaro.org> | 2014-03-13 13:40:51 +0000 |
| commit | ed8eb250d7b097dbd888e46ad0d35a2cb1858221 (patch) | |
| tree | f955d8f10d2daa01f0bd5fed49cdd6f74dbb40eb /drivers/spi/spi-sh-sci.c | |
| parent | 38dbfb59d1175ef458d006556061adeaa8751b72 (diff) | |
| download | linux-ed8eb250d7b097dbd888e46ad0d35a2cb1858221.tar.gz linux-ed8eb250d7b097dbd888e46ad0d35a2cb1858221.tar.bz2 linux-ed8eb250d7b097dbd888e46ad0d35a2cb1858221.zip | |
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>
Diffstat (limited to 'drivers/spi/spi-sh-sci.c')
| -rw-r--r-- | drivers/spi/spi-sh-sci.c | 7 |
1 files changed, 6 insertions, 1 deletions
diff --git a/drivers/spi/spi-sh-sci.c b/drivers/spi/spi-sh-sci.c index 38eb24df796c..41b1346b29d5 100644 --- a/drivers/spi/spi-sh-sci.c +++ b/drivers/spi/spi-sh-sci.c @@ -109,7 +109,7 @@ static void sh_sci_spi_chipselect(struct spi_device *dev, int value) { 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 @@ static int sh_sci_spi_probe(struct platform_device *dev) 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; |