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authorJoe Eykholt <jeykholt@cisco.com>2011-01-29 03:04:08 +0300
committerJames Bottomley <James.Bottomley@suse.de>2011-02-12 20:01:21 +0300
commit1a5c2d7e5c8ef239804cb08b68363e0cd2f74a3d (patch)
tree1131440f3cb543911c0df18fb64e476b27866559 /drivers/scsi/libfc
parent96ad846445ae33dcae1805b68752e3d5c840e3ed (diff)
downloadlinux-1a5c2d7e5c8ef239804cb08b68363e0cd2f74a3d.tar.xz
[SCSI] libfc: add method for setting handler for incoming exchange
Add a method for setting handler for incoming exchange. For multi-sequence exchanges, this allows the target driver to add a response handler for handling subsequent sequences, and exchange manager resets. The new function is called fc_seq_set_resp(). Signed-off-by: Joe Eykholt <jeykholt@cisco.com> Signed-off-by: Robert Love <robert.w.love@intel.com> Signed-off-by: James Bottomley <James.Bottomley@suse.de>
Diffstat (limited to 'drivers/scsi/libfc')
-rw-r--r--drivers/scsi/libfc/fc_exch.c19
1 files changed, 19 insertions, 0 deletions
diff --git a/drivers/scsi/libfc/fc_exch.c b/drivers/scsi/libfc/fc_exch.c
index e0b5b15c355b..1f124c0351b4 100644
--- a/drivers/scsi/libfc/fc_exch.c
+++ b/drivers/scsi/libfc/fc_exch.c
@@ -558,6 +558,22 @@ static struct fc_seq *fc_seq_start_next(struct fc_seq *sp)
return sp;
}
+/*
+ * Set the response handler for the exchange associated with a sequence.
+ */
+static void fc_seq_set_resp(struct fc_seq *sp,
+ void (*resp)(struct fc_seq *, struct fc_frame *,
+ void *),
+ void *arg)
+{
+ struct fc_exch *ep = fc_seq_exch(sp);
+
+ spin_lock_bh(&ep->ex_lock);
+ ep->resp = resp;
+ ep->arg = arg;
+ spin_unlock_bh(&ep->ex_lock);
+}
+
/**
* fc_seq_exch_abort() - Abort an exchange and sequence
* @req_sp: The sequence to be aborted
@@ -2329,6 +2345,9 @@ int fc_exch_init(struct fc_lport *lport)
if (!lport->tt.seq_start_next)
lport->tt.seq_start_next = fc_seq_start_next;
+ if (!lport->tt.seq_set_resp)
+ lport->tt.seq_set_resp = fc_seq_set_resp;
+
if (!lport->tt.exch_seq_send)
lport->tt.exch_seq_send = fc_exch_seq_send;