tree 25c6ba1836e74f608b4e434b4f0f4d5c28b11de1
parent cb986b749c7178422bfbc982cd30e04d5db54bbc
author Oliver Neukum <oliver@neukum.org> 1166608364 +0100
committer Greg Kroah-Hartman <gregkh@suse.de> 1170873433 -0800

Driver core: fix race in sysfs between sysfs_remove_file() and read()/write()

This patch prevents a race between IO and removing a file from sysfs.
It introduces a list of sysfs_buffers associated with a file at the inode.
Upon removal of a file the list is walked and the buffers marked orphaned.
IO to orphaned buffers fails with -ENODEV. The driver can safely free
associated data structures or be unloaded.

Signed-off-by: Oliver Neukum <oliver@neukum.name>
Acked-by: Maneesh Soni <maneesh@in.ibm.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>