Date: Sun, 10 Sep 2000 14:09:40 +1100 (EST) From: Bruce Evans <bde@zeta.org.au> To: Poul-Henning Kamp <phk@FreeBSD.ORG> Cc: arch@FreeBSD.ORG, smp@FreeBSD.ORG Subject: Re: Device probing... Message-ID: <Pine.BSF.4.21.0009101355360.1408-100000@besplex.bde.org> In-Reply-To: <89354.968526601@critter>
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On Sat, 9 Sep 2000, Poul-Henning Kamp wrote: > I would really like to se us move all the device probe/attach code > to run in "normal context", ie enable interrupts before we probe > everything. > > The main argument for this is the drivers can then use the full > complement of kernel infrastructure and interrupts during probe > attach. > > Drivers needs to be able to function in this environment anyway > if they support removeable devices (pccard, usb, etc). > > Are there reasons to not do this I have overlooked ? Active level-triggered interrupts will repeat endlessly if they have no driver. Active edge-triggered interrupts will prevent further interrupts on the same irq if they have no driver. Active interrupts with no driver hopefully arren't a problem with removable devices (after all drivers have had a chance to run). Bruce To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-arch" in the body of the message
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