diff options
| author | Paul Walmsley <paul@booyaka.com> | 2007-05-09 16:47:16 (GMT) |
|---|---|---|
| committer | Jeff Garzik <jeff@garzik.org> | 2007-05-09 23:25:15 (GMT) |
| commit | 5bebf82fff53a96f330c0879ffe870bdf3aaeab6 (patch) | |
| tree | d5ddfcb318dbb008acb6618e80fccbacd3f5cebf /drivers/net | |
| parent | 5b982c5bb7db5cfbc15236d9d45cec32e5472ed5 (diff) | |
| download | linux-5bebf82fff53a96f330c0879ffe870bdf3aaeab6.tar.xz | |
Fix hang on IBM Token Ring PCMCIA card ejection
Ejecting a PCMCIA IBM Token Ring card that has not had its dev->open()
called will reliably trigger an uninitialized spinlock oops when
spinlock debugging is enabled. The system then hangs, occasionally
softlockup oopsing. Apparently ibmtr.c:tok_interrupt() doesn't expect
to be called before tok_open(), but tok_interrupt() gets called anyway
when the card is ejected. So, set an already-existing flag which
causes tok_interrupt() to bail out early upon card ejection. Tested by
inserting and removing the PCMCIA card several times.
Signed-off-by: Paul Walmsley <paul@booyaka.com>
Signed-off-by: Jeff Garzik <jeff@garzik.org>
Diffstat (limited to 'drivers/net')
| -rw-r--r-- | drivers/net/pcmcia/ibmtr_cs.c | 14 |
1 files changed, 9 insertions, 5 deletions
diff --git a/drivers/net/pcmcia/ibmtr_cs.c b/drivers/net/pcmcia/ibmtr_cs.c index 1060154..4ecb8ca 100644 --- a/drivers/net/pcmcia/ibmtr_cs.c +++ b/drivers/net/pcmcia/ibmtr_cs.c @@ -189,16 +189,20 @@ static void ibmtr_detach(struct pcmcia_device *link) { struct ibmtr_dev_t *info = link->priv; struct net_device *dev = info->dev; + struct tok_info *ti = netdev_priv(dev); DEBUG(0, "ibmtr_detach(0x%p)\n", link); + + /* + * When the card removal interrupt hits tok_interrupt(), + * bail out early, so we don't crash the machine + */ + ti->sram_phys |= 1; if (link->dev_node) unregister_netdev(dev); - - { - struct tok_info *ti = netdev_priv(dev); - del_timer_sync(&(ti->tr_timer)); - } + + del_timer_sync(&(ti->tr_timer)); ibmtr_release(link); |