From: Jeff Garzik <jgarzik@pobox.com>
Date: Mon, 31 Oct 2005 04:31:48 +0000 (-0500)
Subject: [libata] locking rewrite (== fix)
X-Git-Tag: v2.6.15-rc1~727^2
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=005a5a06a6dd13a0ca3f2c6a0218e8d94ed36d8a;p=pandora-kernel.git

[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.
---

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