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[2/4] spi/bcm63xx: don't reject reads >= 256 bytes

Message ID 1387312930-22436-3-git-send-email-jogo@openwrt.org (mailing list archive)
State Accepted
Commit 20e9e78f8b0f1ed02a3a095240853b1767482757
Delegated to: Mark Brown
Headers show

Commit Message

Jonas Gorski Dec. 17, 2013, 8:42 p.m. UTC 
The rx_tail register is only 8 bit wide, so it will wrap around
after 256 read bytes. This makes it rather meaningless, so drop any
usage of it to not treat reads over 256 as failed.

Signed-off-by: Jonas Gorski <jogo@openwrt.org>
Acked-by: Florian Fainelli <florian@openwrt.org>
---
 drivers/spi/spi-bcm63xx.c | 8 +-------
 1 file changed, 1 insertion(+), 7 deletions(-)
diff mbox

Patch

diff --git a/drivers/spi/spi-bcm63xx.c b/drivers/spi/spi-bcm63xx.c
index 5693b4f..ae60731 100644
--- a/drivers/spi/spi-bcm63xx.c
+++ b/drivers/spi/spi-bcm63xx.c
@@ -203,13 +203,7 @@  static int bcm63xx_txrx_bufs(struct spi_device *spi, struct spi_transfer *first,
 	if (!timeout)
 		return -ETIMEDOUT;
 
-	/* read out all data */
-	rx_tail = bcm_spi_readb(bs, SPI_RX_TAIL);
-
-	if (do_rx && rx_tail != len)
-		return -EIO;
-
-	if (!rx_tail)
+	if (!do_rx)
 		return 0;
 
 	len = 0;