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authorJean-Christophe Dubois <jcd@tribudubois.net>2008-03-14 01:56:36 +0300
committerJeff Garzik <jeff@garzik.org>2008-03-17 15:06:37 +0300
commit10d0f27c1baa4a094b4965708a15f2b0c4d65f5e (patch)
tree7ebabe73326eba396345d843f1d778bf84d0dc17 /drivers/net/usb
parent4373c9327f10c362f13d5b78557f93a471211a42 (diff)
downloadlinux-10d0f27c1baa4a094b4965708a15f2b0c4d65f5e.tar.xz
rndis_host: fix transfer size negotiation
This patch should resolve a problem that's troubled support for some RNDIS peripherals. It seems to have boiled down to using a variable to establish transfer size limits before it was assigned, which caused those devices to fallback to a default "jumbogram" mode we don't support. Fix by assigning it earlier for RNDIS. Signed-off-by: Jean-Christophe Dubois <jcd@tribudubois.net> [ cleanups ] Signed-off-by: David Brownell <dbrownell@users.sourceforge.net> Signed-off-by: Jeff Garzik <jeff@garzik.org>
Diffstat (limited to 'drivers/net/usb')
-rw-r--r--drivers/net/usb/rndis_host.c12
1 files changed, 8 insertions, 4 deletions
diff --git a/drivers/net/usb/rndis_host.c b/drivers/net/usb/rndis_host.c
index a61324757b17..727547a28992 100644
--- a/drivers/net/usb/rndis_host.c
+++ b/drivers/net/usb/rndis_host.c
@@ -16,10 +16,6 @@
* along with this program; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*/
-
-// #define DEBUG // error path messages, extra info
-// #define VERBOSE // more; success messages
-
#include <linux/module.h>
#include <linux/init.h>
#include <linux/netdevice.h>
@@ -318,6 +314,14 @@ generic_rndis_bind(struct usbnet *dev, struct usb_interface *intf, int flags)
net->hard_header_len += sizeof (struct rndis_data_hdr);
dev->hard_mtu = net->mtu + net->hard_header_len;
+ dev->maxpacket = usb_maxpacket(dev->udev, dev->out, 1);
+ if (dev->maxpacket == 0) {
+ if (netif_msg_probe(dev))
+ dev_dbg(&intf->dev, "dev->maxpacket can't be 0\n");
+ retval = -EINVAL;
+ goto fail_and_release;
+ }
+
dev->rx_urb_size = dev->hard_mtu + (dev->maxpacket + 1);
dev->rx_urb_size &= ~(dev->maxpacket - 1);
u.init->max_transfer_size = cpu_to_le32(dev->rx_urb_size);