A SCSI LLD may overwrite host_scribble in its queuecommand()
implementation. Several drivers need that field to process
requests and aborts correctly. Hence this field must be saved
by scsi_eh_prep_cmnd() and must be restored by
scsi_eh_restore_cmnd().
Signed-off-by: Bart Van Assche <bvanass...@acm.org>
Cc: James Bottomley <jbottom...@parallels.com>
Cc: Mike Christie <micha...@cs.wisc.edu>
Cc: Hannes Reinecke <h...@suse.de>
Cc: Tejun Heo <t...@kernel.org>
---
drivers/scsi/scsi_error.c | 2 ++
include/scsi/scsi_eh.h | 1 +
2 files changed, 3 insertions(+)
diff --git a/drivers/scsi/scsi_error.c b/drivers/scsi/scsi_error.c
index a1b7eff..33dcce3 100644
--- a/drivers/scsi/scsi_error.c
+++ b/drivers/scsi/scsi_error.c
@@ -770,6 +770,7 @@ void scsi_eh_prep_cmnd(struct scsi_cmnd *scmd, struct
scsi_eh_save *ses,
ses->result = scmd->result;
ses->underflow = scmd->underflow;
ses->prot_op = scmd->prot_op;
+ ses->host_scribble = scmd->host_scribble;
scmd->prot_op = SCSI_PROT_NORMAL;
scmd->cmnd = ses->eh_cmnd;
@@ -831,6 +832,7 @@ void scsi_eh_restore_cmnd(struct scsi_cmnd* scmd, struct
scsi_eh_save *ses)
scmd->result = ses->result;
scmd->underflow = ses->underflow;
scmd->prot_op = ses->prot_op;
+ scmd->host_scribble = ses->host_scribble;
}
EXPORT_SYMBOL(scsi_eh_restore_cmnd);
diff --git a/include/scsi/scsi_eh.h b/include/scsi/scsi_eh.h
index 06a8790..7bdb02f 100644
--- a/include/scsi/scsi_eh.h
+++ b/include/scsi/scsi_eh.h
@@ -83,6 +83,7 @@ struct scsi_eh_save {
/* new command support */
unsigned char eh_cmnd[BLK_MAX_CDB];
struct scatterlist sense_sgl;
+ unsigned char *host_scribble;
};
extern void scsi_eh_prep_cmnd(struct scsi_cmnd *scmd,
--
1.7.10.4
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