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From 4d8fa9d3d1fe1d70fe7d59537acf49797f6010a1 Mon Sep 17 00:00:00 2001
From: Jonas Gorski <jogo@openwrt.org>
Date: Sun, 1 Dec 2013 16:19:46 +0100
Subject: [PATCH 2/2] spi/bcm63xx: don't reject reads >= 256 bytes
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>
---
drivers/spi/spi-bcm63xx.c | 8 +-------
1 file changed, 1 insertion(+), 7 deletions(-)
--- a/drivers/spi/spi-bcm63xx.c
+++ b/drivers/spi/spi-bcm63xx.c
@@ -214,13 +214,7 @@ static int bcm63xx_txrx_bufs(struct spi_
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;
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