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[SCSI] libfc: export seq_release() for users of seq_assign() 

Target modules using lport->tt.seq_assign() get a hold on the
exchange but have no way of releasing it.  Add that.

Signed-off-by: Joe Eykholt <jeykholt@cisco.com>
Signed-off-by: James Bottomley <James.Bottomley@suse.de>
This commit is contained in:
Joe Eykholt 2011-01-28 16:04:34 -08:00 committed by James Bottomley
parent 04885b16a1
commit 62bdb6455e
2 changed files with 21 additions and 0 deletions
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14
drivers/scsi/libfc/fc_exch.c
View File

@ -1282,6 +1282,8 @@ free:
* @fp: The request frame
*
* On success, the sequence pointer will be returned and also in fr_seq(@fp).
* A reference will be held on the exchange/sequence for the caller, which
* must call fc_seq_release().
*/
static struct fc_seq *fc_seq_assign(struct fc_lport *lport, struct fc_frame *fp)
{
@ -1298,6 +1300,15 @@ static struct fc_seq *fc_seq_assign(struct fc_lport *lport, struct fc_frame *fp)
return fr_seq(fp);
}
/**
* fc_seq_release() - Release the hold
* @sp: The sequence.
*/
static void fc_seq_release(struct fc_seq *sp)
{
fc_exch_release(fc_seq_exch(sp));
}
/**
* fc_exch_recv_req() - Handler for an incoming request
* @lport: The local port that received the request
@ -2369,6 +2380,9 @@ int fc_exch_init(struct fc_lport *lport)
if (!lport->tt.seq_assign)
lport->tt.seq_assign = fc_seq_assign;
if (!lport->tt.seq_release)
lport->tt.seq_release = fc_seq_release;
return 0;
}
EXPORT_SYMBOL(fc_exch_init);

7
include/scsi/libfc.h
View File

@ -571,6 +571,13 @@ struct libfc_function_template {
*/
struct fc_seq *(*seq_assign)(struct fc_lport *, struct fc_frame *);
/*
* Release the reference on the sequence returned by seq_assign().
*
* STATUS: OPTIONAL
*/
void (*seq_release)(struct fc_seq *);
/*
* Reset an exchange manager, completing all sequences and exchanges.
* If s_id is non-zero, reset only exchanges originating from that FID.