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| author | Andy Shevchenko <andriy.shevchenko@linux.intel.com> | 2015-03-25 19:26:26 +0100 |
|---|---|---|
| committer | Mark Brown <broonie@kernel.org> | 2015-03-25 19:54:40 +0100 |
| commit | 207cda93f0446c2da5461a37252c7468ddc1c2bc (patch) | |
| tree | 04ffdb316fb3a39ee9d60291e985820a5eb3e7b2 /drivers/spi | |
| parent | dmaengine: intel-mid-dma: remove the driver (diff) | |
| download | linux-207cda93f0446c2da5461a37252c7468ddc1c2bc.tar.xz linux-207cda93f0446c2da5461a37252c7468ddc1c2bc.zip | |
spi: dw: fix crash on setup stage
The commit 1a7b7ee72c21 (spi: Ensure that CS line is in non-active state after
spi_setup()) introduces an unconditional call of spi_set_cs() before ->setup().
The dw_spi_set_cs() relies on that fact that ->setup() is already called, but
it doesn't now. This patch fixes the crash by adding an additional check to
dw_spi_set_cs().
Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Signed-off-by: Mark Brown <broonie@kernel.org>
Diffstat (limited to 'drivers/spi')
| -rw-r--r-- | drivers/spi/spi-dw.c | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/drivers/spi/spi-dw.c b/drivers/spi/spi-dw.c index cafac221fbf6..8d67d03c71eb 100644 --- a/drivers/spi/spi-dw.c +++ b/drivers/spi/spi-dw.c @@ -144,7 +144,7 @@ static void dw_spi_set_cs(struct spi_device *spi, bool enable) struct chip_data *chip = spi_get_ctldata(spi); /* Chip select logic is inverted from spi_set_cs() */ - if (chip->cs_control) + if (chip && chip->cs_control) chip->cs_control(!enable); if (!enable) |