From: Dan Williams <dan.j.williams@intel.com>
Date: Fri, 22 Jun 2012 06:30:48 +0000 (-0700)
Subject: [SCSI] libsas: enforce eh strategy handlers only in eh context
X-Git-Tag: v3.6-rc1~103^2~40
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=5db45bdc87ce4f503947adf7896586d60c63322c;p=pandora-kernel.git

[SCSI] libsas: enforce eh strategy handlers only in eh context

The strategy handlers may be called in places that are problematic for
libsas (i.e. sata resets outside of domain revalidation filtering /
libata link recovery), or problematic for userspace (non-blocking ioctl
to sleeping reset functions).  However, these routines are also called
for eh escalations and recovery of scsi_eh_prep_cmnd(), so permit them
as long as we are running in the host's error handler, otherwise arrange
for them to be triggered in eh_context.

Signed-off-by: Dan Williams <dan.j.williams@intel.com>
Signed-off-by: James Bottomley <JBottomley@Parallels.com>
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