[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>

diff --git a/drivers/scsi/bfa/bfad_attr.c b/drivers/scsi/bfa/bfad_attr.c
index 72f5dc3..e9a681d 100644 (file)
--- 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,
 };