From: Ross Biro <rossb@google.com>
To: linux-kernel@vger.kernel.org
Subject: BUG: [2.4.18+] IDE Race Condition
Date: Mon, 27 Jan 2003 09:11:48 -0800 [thread overview]
Message-ID: <3E356854.1090100@google.com> (raw)
There is at least one more IDE race condition in 2.4.18 and 2.4.21-pre3.
Basically the interrupt for the controller being serviced is left on
while setting up the next command. I'm not sure how much trouble it can
cause but it does lead to some interesting stack traces.
The condition
if (masked_irq && hwif->irq != masked_irq)
in ide_do_request should be replaced with
if (!masked_irq || hwif->irq != masked_irq)
in two places.
This doesn't totally eliminate the race conditions, but it does minimize
them some more. I can still see a race in 2.4.18. I'll say more about
it once I've tracked it down.
Ross
next reply other threads:[~2003-01-27 17:02 UTC|newest]
Thread overview: 10+ messages / expand[flat|nested] mbox.gz Atom feed top
2003-01-27 17:11 Ross Biro [this message]
2003-01-27 17:34 ` BUG: [2.4.18+] IDE Race Condition Ross Biro
2003-01-28 2:46 ` Andre Hedrick
2003-01-28 16:48 ` Ross Biro
2003-01-28 17:28 ` Andre Hedrick
2003-01-28 17:42 ` Ross Biro
2003-01-28 18:01 ` Andre Hedrick
2003-01-30 17:34 ` Alan Cox
2003-01-30 16:58 ` Ross Biro
2003-01-30 18:01 ` Alan Cox
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