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| author | Julien May <mailinglist@miromico.ch> | 2008-06-27 15:01:18 +0200 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@suse.de> | 2008-07-21 15:16:48 -0700 |
| commit | 28874b7ec47e1e5cfe2b67420c4d07c6297a43a9 (patch) | |
| tree | 3e86dd66bb7ab04d086ba080e456a71bbe5daf31 /drivers | |
| parent | df3e1ab7334279bc744344bcf05272dc8b985d3d (diff) | |
| download | linux-28874b7ec47e1e5cfe2b67420c4d07c6297a43a9.tar.gz linux-28874b7ec47e1e5cfe2b67420c4d07c6297a43a9.tar.bz2 linux-28874b7ec47e1e5cfe2b67420c4d07c6297a43a9.zip | |
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 <mailinglist@miromico.ch>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
Diffstat (limited to 'drivers')
| -rw-r--r-- | drivers/usb/host/isp116x-hcd.c | 23 |
1 files changed, 19 insertions, 4 deletions
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); } |