tree 5b270817df4bc9661365d789d51c04f3774c3ddd
parent e533825447dcb60a82b7cc9d73d06423c849b9a2
author Jeff Garzik <jgarzik@pobox.com> 1130733108 -0500
committer Jeff Garzik <jgarzik@pobox.com> 1130733108 -0500

[libata] locking rewrite (== fix)

A lot of power packed into a little patch.

This change eliminates the sharing between our controller-wide spinlock
and the SCSI core's Scsi_Host lock.  As the locking in libata was
already highly compartmentalized, always referencing our own lock, and
never scsi_host::host_lock.

As a side effect, this change eliminates a deadlock from calling
scsi_finish_command() while inside our spinlock.