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[PATCH] m68knommu: avoid fec driver hang when link disappears

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Avoid requesting a `Graceful Transmit Stop' when link has disappeared,
because that request cannot complete without link.

Signed-off-by: Greg Ungerer <gerg@uclinux.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
This commit is contained in:
Philippe De Muyter 2006-06-27 13:05:33 +10:00 committed by Linus Torvalds
parent 67bdd98424
commit 677177c531
1 changed files with 11 additions and 4 deletions
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15
drivers/net/fec.c
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@ -22,7 +22,7 @@
* Copyright (c) 2001-2005 Greg Ungerer (gerg@snapgear.com)
*
* Bug fixes and cleanup by Philippe De Muyter (phdm@macqel.be)
* Copyright (c) 2004-2005 Macq Electronique SA.
* Copyright (c) 2004-2006 Macq Electronique SA.
*/
#include <linux/config.h>
@ -2420,9 +2420,16 @@ fec_stop(struct net_device *dev)
fep = netdev_priv(dev);
fecp = fep->hwp;
fecp->fec_x_cntrl = 0x01; /* Graceful transmit stop */
while(!(fecp->fec_ievent & FEC_ENET_GRA));
/*
** We cannot expect a graceful transmit stop without link !!!
*/
if (fep->link)
{
fecp->fec_x_cntrl = 0x01; /* Graceful transmit stop */
udelay(10);
if (!(fecp->fec_ievent & FEC_ENET_GRA))
printk("fec_stop : Graceful transmit stop did not complete !\n");
}
/* Whack a reset. We should wait for this.
*/