[PATCH 3.2 016/185] usb: wusbcore: change WA_SEGS_MAX to a legal value

Ben Hutchings
2013-12-29T02:08:43Z

From: Thomas Pugliese <thomas.pugliese@gmail.com>

commit f74b75e7f920c700636cccca669c7d16d12e9202 upstream.

change WA_SEGS_MAX to a number that is legal according to the WUSB
spec.

Signed-off-by: Thomas Pugliese <thomas.pugliese@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
[bwh: Backported to 3.2: adjust context]
Signed-off-by: Ben Hutchings <ben@decadent.org.uk>
---
drivers/usb/wusbcore/wa-xfer.c | 5 +++--
1 file changed, 3 insertions(+), 2 deletions(-)

--- a/drivers/usb/wusbcore/wa-xfer.c
+++ b/drivers/usb/wusbcore/wa-xfer.c
@@ -90,7 +90,8 @@
#include "wusbhc.h"

enum {
- WA_SEGS_MAX = 255,
+ /* [WUSB] section 8.3.3 allocates 7 bits for the segment index. */
+ WA_SEGS_MAX = 128,
};

enum wa_seg_status {
@@ -444,7 +445,7 @@ static ssize_t __wa_xfer_setup_sizes(str
xfer->seg_size = (xfer->seg_size / maxpktsize) * maxpktsize;
xfer->segs = (urb->transfer_buffer_length + xfer->seg_size - 1)
/ xfer->seg_size;
- if (xfer->segs >= WA_SEGS_MAX) {
+ if (xfer->segs > WA_SEGS_MAX) {
dev_err(dev, "BUG? ops, number of segments %d bigger than %d\n",
(int)(urb->transfer_buffer_length / xfer->seg_size),
WA_SEGS_MAX);