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authorHannes Reinecke <hare@suse.de>2013-11-11 07:44:54 -0500
committerJames Bottomley <JBottomley@Parallels.com>2013-12-19 10:39:02 -0500
commite494f6a728394ab0df194342549ee20e6f0752df (patch)
tree2cbae9eea944540b2777e40f1787a90b78123334 /include/scsi/scsi_cmnd.h
parent2451079bc2ae1334058be8babd44be03ecfa7041 (diff)
[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 'include/scsi/scsi_cmnd.h')
-rw-r--r--include/scsi/scsi_cmnd.h1
1 files changed, 1 insertions, 0 deletions
diff --git a/include/scsi/scsi_cmnd.h b/include/scsi/scsi_cmnd.h
index de5f5d8f1f8a..91558a1f97f4 100644
--- a/include/scsi/scsi_cmnd.h
+++ b/include/scsi/scsi_cmnd.h
@@ -55,6 +55,7 @@ struct scsi_cmnd {
55 struct scsi_device *device; 55 struct scsi_device *device;
56 struct list_head list; /* scsi_cmnd participates in queue lists */ 56 struct list_head list; /* scsi_cmnd participates in queue lists */
57 struct list_head eh_entry; /* entry for the host eh_cmd_q */ 57 struct list_head eh_entry; /* entry for the host eh_cmd_q */
58 struct delayed_work abort_work;
58 int eh_eflags; /* Used by error handlr */ 59 int eh_eflags; /* Used by error handlr */
59 60
60 /* 61 /*