[PATCH 34/64] libfc: eliminate disc->event

Robert Love
2009-08-25T21:01:28Z

There was no need to have the discovery status stored in struct fc_disc.

Change fc_disc_done() to take the discovery status as an argument
and just pass it on to the discovery callback.

Signed-off-by: Joe Eykholt <jeykholt@cisco.com>
Signed-off-by: Robert Love <robert.w.love@intel.com>
---

drivers/scsi/libfc/fc_disc.c | 31 ++++++++++++-------------------
include/scsi/libfc.h | 1 -
2 files changed, 12 insertions(+), 20 deletions(-)

diff --git a/drivers/scsi/libfc/fc_disc.c b/drivers/scsi/libfc/fc_disc.c
index bbea41e..736f917 100644
--- a/drivers/scsi/libfc/fc_disc.c
+++ b/drivers/scsi/libfc/fc_disc.c
@@ -49,7 +49,7 @@ static void fc_disc_gpn_ft_req(struct fc_disc *);
static void fc_disc_gpn_ft_resp(struct fc_seq *, struct fc_frame *, void *);
static int fc_disc_new_target(struct fc_disc *, struct fc_rport_priv *,
struct fc_rport_identifiers *);
-static void fc_disc_done(struct fc_disc *);
+static void fc_disc_done(struct fc_disc *, enum fc_disc_event);
static void fc_disc_timeout(struct work_struct *);
static void fc_disc_single(struct fc_disc *, struct fc_disc_port *);
static void fc_disc_restart(struct fc_disc *);
@@ -329,8 +329,7 @@ static void fc_disc_start(void (*disc_callback)(struct fc_lport *,
if (rdata) {
kref_get(&rdata->kref);
if (!fc_disc_new_target(disc, rdata, &rdata->ids)) {
- disc->event = DISC_EV_SUCCESS;
- fc_disc_done(disc);
+ fc_disc_done(disc, DISC_EV_SUCCESS);
}
kref_put(&rdata->kref, rdata->local_port->tt.rport_destroy);
} else {
@@ -404,20 +403,18 @@ static int fc_disc_new_target(struct fc_disc *disc,
/**
* fc_disc_done() - Discovery has been completed
* @disc: FC discovery context
+ * @event: discovery completion status
+ *
* Locking Note: This function expects that the disc mutex is locked before
* it is called. The discovery callback is then made with the lock released,
* and the lock is re-taken before returning from this function
*/
-static void fc_disc_done(struct fc_disc *disc)
+static void fc_disc_done(struct fc_disc *disc, enum fc_disc_event event)
{
struct fc_lport *lport = disc->lport;
- enum fc_disc_event event;

FC_DISC_DBG(disc, "Discovery complete\n");

- event = disc->event;
- disc->event = DISC_EV_NONE;
-
if (disc->requested)
fc_disc_gpn_ft_req(disc);
else
@@ -460,11 +457,8 @@ static void fc_disc_error(struct fc_disc *disc, struct fc_frame *fp)
}
disc->retry_count++;
schedule_delayed_work(&disc->disc_work, delay);
- } else {
- /* exceeded retries */
- disc->event = DISC_EV_FAILED;
- fc_disc_done(disc);
- }
+ } else
+ fc_disc_done(disc, DISC_EV_FAILED);
}
}

@@ -503,10 +497,12 @@ err:
}

/**
- * fc_disc_gpn_ft_parse() - Parse the list of IDs and names resulting from a request
+ * fc_disc_gpn_ft_parse() - Parse the body of the dNS GPN_FT response.
* @lport: Fibre Channel host port instance
* @buf: GPN_FT response buffer
* @len: size of response buffer
+ *
+ * Goes through the list of IDs and names resulting from a request.
*/
static int fc_disc_gpn_ft_parse(struct fc_disc *disc, void *buf, size_t len)
{
@@ -577,8 +573,7 @@ static int fc_disc_gpn_ft_parse(struct fc_disc *disc, void *buf, size_t len)
}

if (np->fp_flags & FC_NS_FID_LAST) {
- disc->event = DISC_EV_SUCCESS;
- fc_disc_done(disc);
+ fc_disc_done(disc, DISC_EV_SUCCESS);
len = 0;
break;
}
@@ -669,8 +664,7 @@ static void fc_disc_gpn_ft_resp(struct fc_seq *sp, struct fc_frame *fp,
FC_DISC_DBG(disc, "GPN_FT rejected reason %x exp %x "
"(check zoning)\n", cp->ct_reason,
cp->ct_explan);
- disc->event = DISC_EV_FAILED;
- fc_disc_done(disc);
+ fc_disc_done(disc, DISC_EV_FAILED);
} else {
FC_DISC_DBG(disc, "GPN_FT unexpected response code "
"%x\n", ntohs(cp->ct_cmd));
@@ -782,7 +776,6 @@ int fc_disc_init(struct fc_lport *lport)

disc->lport = lport;
disc->delay = FC_DISC_DELAY;
- disc->event = DISC_EV_NONE;

return 0;
}
diff --git a/include/scsi/libfc.h b/include/scsi/libfc.h
index bf4b1c2..f3f320f 100644
--- a/include/scsi/libfc.h
+++ b/include/scsi/libfc.h
@@ -679,7 +679,6 @@ struct fc_disc {
unsigned char requested;
unsigned short seq_count;
unsigned char buf_len;
- enum fc_disc_event event;

void (*disc_callback)(struct fc_lport *,
enum fc_disc_event);