diff options
| author | Steve Glendinning <steve.glendinning@smsc.com> | 2009-09-22 04:00:27 +0000 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@suse.de> | 2009-10-12 12:40:28 -0700 |
| commit | fe13bc44dae6452f49493ceb3cff40d85839b7ea (patch) | |
| tree | 7bfa23788a27c9cec98b488392632727f87fbc2f /include | |
| parent | 657453424a3c382035983f9a47306fafea730f6d (diff) | |
smsc95xx: fix transmission where ZLP is expected
[ Upstream commit ec4756238239f1a331d9fb95bad8b281dad56855 ]
Usbnet framework assumes USB hardware doesn't handle zero length
packets, but SMSC LAN95xx requires these to be sent for correct
operation.
This patch fixes an easily reproducible tx lockup when sending a frame
that results in exactly 512 bytes in a USB transmission (e.g. a UDP
frame with 458 data bytes, due to IP headers and our USB headers). It
adds an extra flag to usbnet for the hardware driver to indicate that
it can handle and requires the zero length packets.
This patch should not affect other usbnet users, please also consider
for -stable.
Signed-off-by: Steve Glendinning <steve.glendinning@smsc.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
Diffstat (limited to 'include')
| -rw-r--r-- | include/linux/usb/usbnet.h | 1 |
1 files changed, 1 insertions, 0 deletions
diff --git a/include/linux/usb/usbnet.h b/include/linux/usb/usbnet.h index 310e18a880ff..c42eeb32058a 100644 --- a/include/linux/usb/usbnet.h +++ b/include/linux/usb/usbnet.h @@ -86,6 +86,7 @@ struct driver_info { #define FLAG_FRAMING_AX 0x0040 /* AX88772/178 packets */ #define FLAG_WLAN 0x0080 /* use "wlan%d" names */ +#define FLAG_SEND_ZLP 0x0200 /* hw requires ZLPs are sent */ /* init device ... can sleep, or cause probe() failure */ |