commit f74b75e7f920c700636cccca669c7d16d12e9202 upstream.
Change WA_SEGS_MAX to a number that is legal according to the WUSB spec
and correct the test for exceeding this value. This patch is against
3.12.y and is intended for -stable.
Signed-off-by: Thomas Pugliese <thomas.pugliese@xxxxxxxxx>
Cc: <stable@xxxxxxxxxxxxxxx>
---
drivers/usb/wusbcore/wa-xfer.c | 5 +++--
1 file changed, 3 insertions(+), 2 deletions(-)
diff --git a/drivers/usb/wusbcore/wa-xfer.c b/drivers/usb/wusbcore/wa-xfer.c
index 6ad02f5..3dcf66f 100644
--- a/drivers/usb/wusbcore/wa-xfer.c
+++ b/drivers/usb/wusbcore/wa-xfer.c
@@ -91,7 +91,8 @@
#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 {
@@ -446,7 +447,7 @@ static ssize_t __wa_xfer_setup_sizes(struct wa_xfer *xfer,
}
xfer->seg_size = (xfer->seg_size / maxpktsize) * maxpktsize;
xfer->segs = DIV_ROUND_UP(urb->transfer_buffer_length, 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);
--
1.7.10.4
--
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