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authorTejun Heo <tj@kernel.org>2010-05-19 15:38:58 +0200
committerJeff Garzik <jgarzik@redhat.com>2010-05-25 19:41:16 -0400
commite7ecd435692ca9bde9d124be30b3a26e672ea6c2 (patch)
tree5587584952c37e2867a2e27b03b1accfbeab7a30 /Documentation/cpu-freq/cpu-drivers.txt
parent9a7780c9acb821fe1c2b6fc53f74cc2556ff5364 (diff)
libata: disable ATAPI AN by default
There are ATAPI devices which raise AN when hit by commands issued by open(). This leads to infinite loop of AN -> MEDIA_CHANGE uevent -> udev open() to check media -> AN. Both ACS and SerialATA standards don't define in which case ATAPI devices are supposed to raise or not raise AN. They both list media insertion event as a possible use case for ATAPI ANs but there is no clear description of what constitutes such events. As such, it seems a bit too naive to export ANs directly to userland as MEDIA_CHANGE events without further verification (which should behave similarly to windows as it apparently is the only thing that some hardware vendors are testing against). This patch adds libata.atapi_an module parameter and disables ATAPI AN by default for now. Signed-off-by: Tejun Heo <tj@kernel.org> Cc: Kay Sievers <kay.sievers@vrfy.org> Cc: Nick Bowler <nbowler@elliptictech.com> Cc: David Zeuthen <david@fubar.dk> Cc: stable@kernel.org Signed-off-by: Jeff Garzik <jgarzik@redhat.com>
Diffstat (limited to 'Documentation/cpu-freq/cpu-drivers.txt')
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