From 31e5d4abceaa3d11ff583ddf76ec292e90eacb7d Mon Sep 17 00:00:00 2001
From: Brian Niebuhr <bniebuhr3@gmail.com>
Date: Mon, 25 Jan 2010 14:45:40 -0600
Subject: [PATCH] USB: gadget: fix EEM gadget CRC usage
eem_wrap() is sending a sentinel CRC, but it didn't indicate that to
the host, it should zero bit 14 (bmCRC) in the EEM packet header,
instead of setting it.
Also remove a redundant crc calculation in eem_unwrap().
Signed-off-by: Steve Longerbeam <stevel@netspectrum.com>
Acked-by: Brian Niebuhr <bniebuhr@efjohnson.com>
Acked-by: David Brownell <dbrownell@users.sourceforge.net>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
---
drivers/usb/gadget/f_eem.c | 3 +--
1 file changed, 1 insertion(+), 2 deletions(-)
diff --git a/drivers/usb/gadget/f_eem.c b/drivers/usb/gadget/f_eem.c
index 0a577d5694fd..d4f0db58a8ad 100644
--- a/drivers/usb/gadget/f_eem.c
+++ b/drivers/usb/gadget/f_eem.c
@@ -358,7 +358,7 @@ done:
* b15: bmType (0 == data)
*/
len = skb->len;
- put_unaligned_le16((len & 0x3FFF) | BIT(14), skb_push(skb, 2));
+ put_unaligned_le16(len & 0x3FFF, skb_push(skb, 2));
/* add a zero-length EEM packet, if needed */
if (padlen)
@@ -464,7 +464,6 @@ static int eem_unwrap(struct gether *port,
}
/* validate CRC */
- crc = get_unaligned_le32(skb->data + len - ETH_FCS_LEN);
if (header & BIT(14)) {
crc = get_unaligned_le32(skb->data + len
- ETH_FCS_LEN);
--
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