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[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>
This commit is contained in:
Kevin Vigor 2005-09-22 00:49:24 -07:00 committed by Linus Torvalds
parent 4b2e790a4d
commit a85a46f2c3
1 changed files with 20 additions and 9 deletions
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17
drivers/usb/net/pegasus.c
View File

@ -647,6 +647,13 @@ static void read_bulk_callback(struct urb *urb, struct pt_regs *regs)
pkt_len -= 8;
}
/*
* If the packet is unreasonably long, quietly drop it rather than
* kernel panicing by calling skb_put.
*/
if (pkt_len > PEGASUS_MTU)
goto goon;
/*
* at this point we are sure pegasus->rx_skb != NULL
* so we go ahead and pass up the packet.
@ -886,16 +893,18 @@ static inline void get_interrupt_interval(pegasus_t * pegasus)
__u8 data[2];
read_eprom_word(pegasus, 4, (__u16 *) data);
if (pegasus->usb->speed != USB_SPEED_HIGH) {
if (data[1] < 0x80) {
if (netif_msg_timer(pegasus))
dev_info(&pegasus->intf->dev,
"intr interval changed from %ums to %ums\n",
dev_info(&pegasus->intf->dev, "intr interval "
"changed from %ums to %ums\n",
data[1], 0x80);
data[1] = 0x80;
#ifdef PEGASUS_WRITE_EEPROM
write_eprom_word(pegasus, 4, *(__u16 *) data);
#endif
}
}
pegasus->intr_interval = data[1];
}
@ -904,8 +913,9 @@ static void set_carrier(struct net_device *net)
pegasus_t *pegasus = netdev_priv(net);
u16 tmp;
if (read_mii_word(pegasus, pegasus->phy, MII_BMSR, &tmp))
if (!read_mii_word(pegasus, pegasus->phy, MII_BMSR, &tmp))
return;
if (tmp & BMSR_LSTATUS)
netif_carrier_on(net);
else
@ -1355,6 +1365,7 @@ static void pegasus_disconnect(struct usb_interface *intf)
cancel_delayed_work(&pegasus->carrier_check);
unregister_netdev(pegasus->net);
usb_put_dev(interface_to_usbdev(intf));
unlink_all_urbs(pegasus);
free_all_urbs(pegasus);
free_skb_pool(pegasus);
if (pegasus->rx_skb)