Fix hang on IBM Token Ring PCMCIA card ejection

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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>

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Paul Walmsley 2007-05-09 10:47:16 -06:00 • committed by Jeff Garzik

parent 5b982c5bb7

commit 5bebf82fff

1 changed files with 9 additions and 5 deletions

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drivers/net/pcmcia/ibmtr_cs.c

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