Date: Sun, 31 Oct 2004 14:19:00 -0700 (MST) From: "M. Warner Losh" <imp@bsdimp.com> To: mjacob44@yahoo.com Cc: cvs-all@FreeBSD.org Subject: Re: cvs commit: src/sys/pci if_vr.c Message-ID: <20041031.141900.36023096.imp@bsdimp.com> In-Reply-To: <20041031035037.59607.qmail@web21422.mail.yahoo.com> References: <F984F473F79BBB9BF467E2C4@caspian.scsiguy.com> <20041031035037.59607.qmail@web21422.mail.yahoo.com>
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In message: <20041031035037.59607.qmail@web21422.mail.yahoo.com>
Matthew Jacob <mjacob44@yahoo.com> writes:
: Shouldn't an API for adding or removing ISR's be responsible for
: handling just such a race condition?
It does. After you've deregistered your interrupt, you are guaranteed
that (a) it will never be called again and (b) no one is currently in
that ISR.
However, if you just turn off the interrupts in the hardware device,
neither (a) nor (b) apply.
Warner
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