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author | Hannes Reinecke <hare@suse.de> | 2013-11-11 13:44:54 +0100 |
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committer | James Bottomley <JBottomley@Parallels.com> | 2013-12-19 16:39:02 +0100 |
commit | e494f6a728394ab0df194342549ee20e6f0752df (patch) | |
tree | 2cbae9eea944540b2777e40f1787a90b78123334 /mm/mempool.c | |
parent | [SCSI] Fix erratic device offline during EH (diff) | |
download | linux-e494f6a728394ab0df194342549ee20e6f0752df.tar.xz linux-e494f6a728394ab0df194342549ee20e6f0752df.zip |
[SCSI] improved eh timeout handler
When a command runs into a timeout we need to send an 'ABORT TASK'
TMF. This is typically done by the 'eh_abort_handler' LLDD callback.
Conceptually, however, this function is a normal SCSI command, so
there is no need to enter the error handler.
This patch implements a new scsi_abort_command() function which
invokes an asynchronous function scsi_eh_abort_handler() to
abort the commands via the usual 'eh_abort_handler'.
If abort succeeds the command is either retried or terminated,
depending on the number of allowed retries. However, 'eh_eflags'
records the abort, so if the retry would fail again the
command is pushed onto the error handler without trying to
abort it (again); it'll be cleared up from SCSI EH.
[hare: smatch detected stray switch fixed]
Signed-off-by: Hannes Reinecke <hare@suse.de>
Signed-off-by: James Bottomley <JBottomley@Parallels.com>
Diffstat (limited to 'mm/mempool.c')
0 files changed, 0 insertions, 0 deletions