From 28874b7ec47e1e5cfe2b67420c4d07c6297a43a9 Mon Sep 17 00:00:00 2001 From: Julien May Date: Fri, 27 Jun 2008 15:01:18 +0200 Subject: USB: Fix bug with byte order in isp116x-hcd.c fio write/read URB payload data are transfered in wrong byte order on a big endinan architecture (AVR32). Signed-off-by: Julien May Signed-off-by: Greg Kroah-Hartman --- drivers/usb/host/isp116x-hcd.c | 23 +++++++++++++++++++---- 1 file changed, 19 insertions(+), 4 deletions(-) (limited to 'drivers/usb') diff --git a/drivers/usb/host/isp116x-hcd.c b/drivers/usb/host/isp116x-hcd.c index 109dee82a376..31178e10cbbe 100644 --- a/drivers/usb/host/isp116x-hcd.c +++ b/drivers/usb/host/isp116x-hcd.c @@ -94,6 +94,10 @@ static void write_ptddata_to_fifo(struct isp116x *isp116x, void *buf, int len) u16 w; int quot = len % 4; + /* buffer is already in 'usb data order', which is LE. */ + /* When reading buffer as u16, we have to take care byte order */ + /* doesn't get mixed up */ + if ((unsigned long)dp2 & 1) { /* not aligned */ for (; len > 1; len -= 2) { @@ -105,8 +109,11 @@ static void write_ptddata_to_fifo(struct isp116x *isp116x, void *buf, int len) isp116x_write_data16(isp116x, (u16) * dp); } else { /* aligned */ - for (; len > 1; len -= 2) - isp116x_raw_write_data16(isp116x, *dp2++); + for (; len > 1; len -= 2) { + /* Keep byte order ! */ + isp116x_raw_write_data16(isp116x, cpu_to_le16(*dp2++)); + } + if (len) isp116x_write_data16(isp116x, 0xff & *((u8 *) dp2)); } @@ -124,6 +131,10 @@ static void read_ptddata_from_fifo(struct isp116x *isp116x, void *buf, int len) u16 w; int quot = len % 4; + /* buffer is already in 'usb data order', which is LE. */ + /* When reading buffer as u16, we have to take care byte order */ + /* doesn't get mixed up */ + if ((unsigned long)dp2 & 1) { /* not aligned */ for (; len > 1; len -= 2) { @@ -131,12 +142,16 @@ static void read_ptddata_from_fifo(struct isp116x *isp116x, void *buf, int len) *dp++ = w & 0xff; *dp++ = (w >> 8) & 0xff; } + if (len) *dp = 0xff & isp116x_read_data16(isp116x); } else { /* aligned */ - for (; len > 1; len -= 2) - *dp2++ = isp116x_raw_read_data16(isp116x); + for (; len > 1; len -= 2) { + /* Keep byte order! */ + *dp2++ = le16_to_cpu(isp116x_raw_read_data16(isp116x)); + } + if (len) *(u8 *) dp2 = 0xff & isp116x_read_data16(isp116x); } -- cgit v1.2.3