[prev in list] [next in list] [prev in thread] [next in thread]
List: linux-kernel
Subject: Re: [PATCH] add legacy I/O and memory access routines to /proc/bus/pci API
From: Andreas Dilger <adilger () clusterfs ! com>
Date: 2004-12-15 21:03:46
Message-ID: 20041215210346.GK9923 () schnapps ! adilger ! int
[Download RAW message or body]
On Dec 15, 2004 09:27 -0800, Jesse Barnes wrote:
> +write
> + Legacy I/O port space reads and writes must also be to a file
> + position >64k--the kernel will route them to the target device.
Shouldn't that be < 64k based on the description of lseek?
> +lseek
> + Can be used to set the current file position. Note that the file
> + size is limited to 64k as that's how big legacy I/O space is.
> +ioctl
> + Note that not all architectures support the *_MMAP_* or *_RW_* ioctl
> + commands. If they're not supported, ioctl will return -EINVAL.
Shouldn't they return -ENOTTY? That indicates to the caller that the
ioctl isn't handled, vs -EINVAL which indicates bad value being passed
(e.g. bad write size).
Cheers, Andreas
--
Andreas Dilger
http://sourceforge.net/projects/ext2resize/
http://members.shaw.ca/adilger/ http://members.shaw.ca/golinux/
[Attachment #3 (application/pgp-signature)]
-
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@vger.kernel.org
More majordomo info at http://vger.kernel.org/majordomo-info.html
Please read the FAQ at http://www.tux.org/lkml/
[prev in list] [next in list] [prev in thread] [next in thread]
Configure |
About |
News |
Add a list |
Sponsored by KoreLogic