[PATCH 18/20] Blackfin SPI Driver: fix NULL pointer crash

Bryan Wu
2009-02-06T07:17:53Z

fix NULL pointer crash when cleaning up from invalid platform resources

Signed-off-by: Mike Frysinger <vapier.adi@gmail.com>
Signed-off-by: Bryan Wu <cooloney@kernel.org>
---
drivers/spi/spi_bfin5xx.c | 3 +++
1 files changed, 3 insertions(+), 0 deletions(-)

diff --git a/drivers/spi/spi_bfin5xx.c b/drivers/spi/spi_bfin5xx.c
index f9e1fbc..9459c42 100644
--- a/drivers/spi/spi_bfin5xx.c
+++ b/drivers/spi/spi_bfin5xx.c
@@ -1178,6 +1178,9 @@ static void bfin_spi_cleanup(struct spi_device *spi)
{
struct chip_data *chip = spi_get_ctldata(spi);

+ if (!chip)
+ return;
+
if ((chip->chip_select_num > 0)
&& (chip->chip_select_num <= spi->master->num_chipselect))
peripheral_free(ssel[spi->master->bus_num]
--
1.5.6.3