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Re: kern/38758: LOCKDEBUG kernel hangs in esp(4) driver
The following reply was made to PR kern/38758; it has been noted by GNATS.
From: Izumi Tsutsui <tsutsui%ceres.dti.ne.jp@localhost>
Cc: kern-bug-people%NetBSD.org@localhost, gnats-admin%NetBSD.org@localhost,
Subject: Re: kern/38758: LOCKDEBUG kernel hangs in esp(4) driver
Date: Tue, 27 May 2008 23:55:26 +0900
> sun3 uses real DMA, doesn't it? Different code paths, probably. The
> mac68k MD code doesn't use simple_lock() anywhere, though.
I think the problem is esp interrupts are implicitly enabled
by spl2() in esp_quick_dma_go().
I have no idea if there is a safe way to enable serial
interrupts without enabling esp interrupts.
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