diff mbox

[3.8,032/152] usb: wusbcore: change WA_SEGS_MAX to a legal value

Message ID 1386371476-2477-33-git-send-email-kamal@canonical.com
State New
Headers show

Commit Message

Kamal Mostafa Dec. 6, 2013, 11:09 p.m. UTC 
3.8.13.14 -stable review patch.  If anyone has any objections, please let me know.

------------------

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>
[ kamal: backport to 3.8 (context) ]
Signed-off-by: Kamal Mostafa <kamal@canonical.com>
---
 drivers/usb/wusbcore/wa-xfer.c | 5 +++--
 1 file changed, 3 insertions(+), 2 deletions(-)
diff mbox

Patch

diff --git a/drivers/usb/wusbcore/wa-xfer.c b/drivers/usb/wusbcore/wa-xfer.c
index 57c01ab..5f6df6e 100644
--- 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(struct wa_xfer *xfer,
 	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);