Blackfin SPI Driver: fix NULL pointer crash

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>
Cc: David Brownell <david-b@pacbell.net>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

1 files changed, 3 insertions, 0 deletions

diff --git a/drivers/spi/spi_bfin5xx.c b/drivers/spi/spi_bfin5xx.c
index d1ff34f3f6bd..53819c961a31 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]