From 4dde506944f8ea3431bf4a250c13621c8f3939bb Mon Sep 17 00:00:00 2001
From: Vijaya Mohan Guvva <vmohan@brocade.com>
Date: Mon, 13 May 2013 02:33:34 -0700
Subject: [PATCH] [SCSI] bfa: dis-associate bfa path_tov with dev_loss_tmo
Disassoicate path_tov in the driver with the dev_loss_tmo set by the
application.
Signed-off-by: Vijaya Mohan Guvva <vmohan@brocade.com>
Signed-off-by: James Bottomley <JBottomley@Parallels.com>
---
drivers/scsi/bfa/bfad_attr.c | 33 +++++++--------------------------
1 file changed, 7 insertions(+), 26 deletions(-)
diff --git a/drivers/scsi/bfa/bfad_attr.c b/drivers/scsi/bfa/bfad_attr.c
index 72f5dc32cc12..e9a681d31223 100644
--- a/drivers/scsi/bfa/bfad_attr.c
+++ b/drivers/scsi/bfa/bfad_attr.c
@@ -334,24 +334,11 @@ bfad_im_reset_stats(struct Scsi_Host *shost)
return;
}
-/*
- * FC transport template entry, get rport loss timeout.
- */
-static void
-bfad_im_get_rport_loss_tmo(struct fc_rport *rport)
-{
- struct bfad_itnim_data_s *itnim_data = rport->dd_data;
- struct bfad_itnim_s *itnim = itnim_data->itnim;
- struct bfad_s *bfad = itnim->im->bfad;
- unsigned long flags;
-
- spin_lock_irqsave(&bfad->bfad_lock, flags);
- rport->dev_loss_tmo = bfa_fcpim_path_tov_get(&bfad->bfa);
- spin_unlock_irqrestore(&bfad->bfad_lock, flags);
-}
-
/*
* FC transport template entry, set rport loss timeout.
+ * Update dev_loss_tmo based on the value pushed down by the stack
+ * In case it is lesser than path_tov of driver, set it to path_tov + 1
+ * to ensure that the driver times out before the application
*/
static void
bfad_im_set_rport_loss_tmo(struct fc_rport *rport, u32 timeout)
@@ -359,15 +346,11 @@ bfad_im_set_rport_loss_tmo(struct fc_rport *rport, u32 timeout)
struct bfad_itnim_data_s *itnim_data = rport->dd_data;
struct bfad_itnim_s *itnim = itnim_data->itnim;
struct bfad_s *bfad = itnim->im->bfad;
- unsigned long flags;
-
- if (timeout > 0) {
- spin_lock_irqsave(&bfad->bfad_lock, flags);
- bfa_fcpim_path_tov_set(&bfad->bfa, timeout);
- rport->dev_loss_tmo = bfa_fcpim_path_tov_get(&bfad->bfa);
- spin_unlock_irqrestore(&bfad->bfad_lock, flags);
- }
+ uint16_t path_tov = bfa_fcpim_path_tov_get(&bfad->bfa);
+ rport->dev_loss_tmo = timeout;
+ if (timeout < path_tov)
+ rport->dev_loss_tmo = path_tov + 1;
}
static int
@@ -665,7 +648,6 @@ struct fc_function_template bfad_im_fc_function_template = {
.show_rport_maxframe_size = 1,
.show_rport_supported_classes = 1,
.show_rport_dev_loss_tmo = 1,
- .get_rport_dev_loss_tmo = bfad_im_get_rport_loss_tmo,
.set_rport_dev_loss_tmo = bfad_im_set_rport_loss_tmo,
.issue_fc_host_lip = bfad_im_issue_fc_host_lip,
.vport_create = bfad_im_vport_create,
@@ -723,7 +705,6 @@ struct fc_function_template bfad_im_vport_fc_function_template = {
.show_rport_maxframe_size = 1,
.show_rport_supported_classes = 1,
.show_rport_dev_loss_tmo = 1,
- .get_rport_dev_loss_tmo = bfad_im_get_rport_loss_tmo,
.set_rport_dev_loss_tmo = bfad_im_set_rport_loss_tmo,
};
--
2.30.9