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authorKevin Vigor <kevin@realmsys.com>2005-09-22 03:49:24 -0400
committerLinus Torvalds <torvalds@g5.osdl.org>2005-09-22 10:58:26 -0400
commita85a46f2c38def5150251816890393803fdae7d0 (patch)
tree98cfbc561911ee869d29a30b40847fae15bd65f1 /drivers/usb/net
parent4b2e790a4d73d729d936cc42f3b08af34f8ea5c6 (diff)
[PATCH] USB: fix pegasus driver
Addresses some small bugs in the pegasus ethernet-over-USB driver. Specifically, malformed long packets from the adapter could cause a kernel panic; the interrupt interval calculation was inappropriate for high-speed devices; the return code from read_mii_word was tested incorrectly; and failure to unlink outstanding URBs before freeing them could lead to kernel panics when unloading the driver. Signed-off-by: Kevin Vigor <kevin@realmsys.com> Cc: Petko Manolov <petkan@users.sourceforge.net> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
Diffstat (limited to 'drivers/usb/net')
-rw-r--r--drivers/usb/net/pegasus.c29
1 files changed, 20 insertions, 9 deletions
diff --git a/drivers/usb/net/pegasus.c b/drivers/usb/net/pegasus.c
index 7484d34780fc..6a4ffe6c3977 100644
--- a/drivers/usb/net/pegasus.c
+++ b/drivers/usb/net/pegasus.c
@@ -648,6 +648,13 @@ static void read_bulk_callback(struct urb *urb, struct pt_regs *regs)
648 } 648 }
649 649
650 /* 650 /*
651 * If the packet is unreasonably long, quietly drop it rather than
652 * kernel panicing by calling skb_put.
653 */
654 if (pkt_len > PEGASUS_MTU)
655 goto goon;
656
657 /*
651 * at this point we are sure pegasus->rx_skb != NULL 658 * at this point we are sure pegasus->rx_skb != NULL
652 * so we go ahead and pass up the packet. 659 * so we go ahead and pass up the packet.
653 */ 660 */
@@ -886,15 +893,17 @@ static inline void get_interrupt_interval(pegasus_t * pegasus)
886 __u8 data[2]; 893 __u8 data[2];
887 894
888 read_eprom_word(pegasus, 4, (__u16 *) data); 895 read_eprom_word(pegasus, 4, (__u16 *) data);
889 if (data[1] < 0x80) { 896 if (pegasus->usb->speed != USB_SPEED_HIGH) {
890 if (netif_msg_timer(pegasus)) 897 if (data[1] < 0x80) {
891 dev_info(&pegasus->intf->dev, 898 if (netif_msg_timer(pegasus))
892 "intr interval changed from %ums to %ums\n", 899 dev_info(&pegasus->intf->dev, "intr interval "
893 data[1], 0x80); 900 "changed from %ums to %ums\n",
894 data[1] = 0x80; 901 data[1], 0x80);
895#ifdef PEGASUS_WRITE_EEPROM 902 data[1] = 0x80;
896 write_eprom_word(pegasus, 4, *(__u16 *) data); 903#ifdef PEGASUS_WRITE_EEPROM
904 write_eprom_word(pegasus, 4, *(__u16 *) data);
897#endif 905#endif
906 }
898 } 907 }
899 pegasus->intr_interval = data[1]; 908 pegasus->intr_interval = data[1];
900} 909}
@@ -904,8 +913,9 @@ static void set_carrier(struct net_device *net)
904 pegasus_t *pegasus = netdev_priv(net); 913 pegasus_t *pegasus = netdev_priv(net);
905 u16 tmp; 914 u16 tmp;
906 915
907 if (read_mii_word(pegasus, pegasus->phy, MII_BMSR, &tmp)) 916 if (!read_mii_word(pegasus, pegasus->phy, MII_BMSR, &tmp))
908 return; 917 return;
918
909 if (tmp & BMSR_LSTATUS) 919 if (tmp & BMSR_LSTATUS)
910 netif_carrier_on(net); 920 netif_carrier_on(net);
911 else 921 else
@@ -1355,6 +1365,7 @@ static void pegasus_disconnect(struct usb_interface *intf)
1355 cancel_delayed_work(&pegasus->carrier_check); 1365 cancel_delayed_work(&pegasus->carrier_check);
1356 unregister_netdev(pegasus->net); 1366 unregister_netdev(pegasus->net);
1357 usb_put_dev(interface_to_usbdev(intf)); 1367 usb_put_dev(interface_to_usbdev(intf));
1368 unlink_all_urbs(pegasus);
1358 free_all_urbs(pegasus); 1369 free_all_urbs(pegasus);
1359 free_skb_pool(pegasus); 1370 free_skb_pool(pegasus);
1360 if (pegasus->rx_skb) 1371 if (pegasus->rx_skb)