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 <[email protected]>
Signed-off-by: David Brownell <[email protected]>
Signed-off-by: Andrew Morton <[email protected]>
Signed-off-by: Linus Torvalds <[email protected]>

diff --git a/drivers/spi/spi_s3c24xx.c b/drivers/spi/spi_s3c24xx.c
index e75103aac79054706920dabe78301c790c083e3d..6f2c79da984dc01bb7b359f5ffb5a6a98ef5b7b0 100644 (file)
--- 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;