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authorBrian Niebuhr <bniebuhr3@gmail.com>2010-01-25 14:45:40 -0600
committerGreg Kroah-Hartman <gregkh@suse.de>2010-02-16 15:11:10 -0800
commit31e5d4abceaa3d11ff583ddf76ec292e90eacb7d (patch)
treeb5a8132979a4fb5bcfc07f9f2409828e6081cc16
parentdd091c7b3280d4811b855d034fa91519fd3485ef (diff)
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>
-rw-r--r--drivers/usb/gadget/f_eem.c3
1 files changed, 1 insertions, 2 deletions
diff --git a/drivers/usb/gadget/f_eem.c b/drivers/usb/gadget/f_eem.c
index 0a577d5694f..d4f0db58a8a 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);