Blackfin SPI Driver: fix NULL pointer crash

Fix NULL pointer crash when cleaning up from invalid platform resources

Signed-off-by: Mike Frysinger <[email protected]>
Signed-off-by: Bryan Wu <[email protected]>
Cc: David Brownell <[email protected]>
Signed-off-by: Andrew Morton <[email protected]>
Signed-off-by: Linus Torvalds <[email protected]>

diff --git a/drivers/spi/spi_bfin5xx.c b/drivers/spi/spi_bfin5xx.c
index d1ff34f3f6bd309b8af6639b0f079b6237b000a8..53819c961a3160fbb3fcbcddf098f2f6a363c7da 100644 (file)
--- 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]