spi: spi_s3c24xx driver must init completion

The s3c24xx_spi_txrx() function should initialise the completion each time
before using it, otherwise we end up with the possibility of returning success
before the interrupt handler has processed all the data.

Signed-off-by: Ben Dooks <ben-linux@fluff.org>
Signed-off-by: David Brownell <dbrownell@users.sourceforge.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_s3c24xx.c b/drivers/spi/spi_s3c24xx.c
index e75103aac790..6f2c79da984d 100644
--- a/drivers/spi/spi_s3c24xx.c
+++ b/drivers/spi/spi_s3c24xx.c
@@ -192,8 +192,11 @@ static int s3c24xx_spi_txrx(struct spi_device *spi, struct spi_transfer *t)
         hw->len = t->len;
         hw->count = 0;
 
+        init_completion(&hw->done);
+
         /* send the first byte */
         writeb(hw_txbyte(hw, 0), hw->regs + S3C2410_SPTDAT);
+
         wait_for_completion(&hw->done);
 
         return hw->count;