linux-kernel - [PATCH 4.4 105/210] mtip32xx: Remove unwanted code from taskfile error handler

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Date:	Sun, 10 Apr 2016 11:35:26 -0700
From:	Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To:	linux-kernel@...r.kernel.org
Cc:	Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
	stable@...r.kernel.org, Selvan Mani <smani@...ron.com>,
	Rajesh Kumar Sambandam <rsambandam@...ron.com>,
	Asai Thambi S P <asamymuthupa@...ron.com>,
	Jens Axboe <axboe@...com>
Subject: [PATCH 4.4 105/210] mtip32xx: Remove unwanted code from taskfile error handler

4.4-stable review patch.  If anyone has any objections, please let me know.

------------------

From: Asai Thambi SP <asamymuthupa@...ron.com>

commit e35b94738a2f7caa12017f69ef385cb6b8028965 upstream.

Remove setting and clearing MTIP_PF_EH_ACTIVE_BIT flag in
mtip_handle_tfe() as they are redundant. Also avoid waking
up service thread from mtip_handle_tfe() because it is
already woken up in case of taskfile error.

Signed-off-by: Selvan Mani <smani@...ron.com>
Signed-off-by: Rajesh Kumar Sambandam <rsambandam@...ron.com>
Signed-off-by: Asai Thambi S P <asamymuthupa@...ron.com>
Signed-off-by: Jens Axboe <axboe@...com>
Signed-off-by: Greg Kroah-Hartman <gregkh@...uxfoundation.org>

---
 drivers/block/mtip32xx/mtip32xx.c |    9 +--------
 1 file changed, 1 insertion(+), 8 deletions(-)

--- a/drivers/block/mtip32xx/mtip32xx.c
+++ b/drivers/block/mtip32xx/mtip32xx.c
@@ -618,8 +618,6 @@ static void mtip_handle_tfe(struct drive
 
 	port = dd->port;
 
-	set_bit(MTIP_PF_EH_ACTIVE_BIT, &port->flags);
-
 	if (test_bit(MTIP_PF_IC_ACTIVE_BIT, &port->flags)) {
 		cmd = mtip_cmd_from_tag(dd, MTIP_TAG_INTERNAL);
 		dbg_printk(MTIP_DRV_NAME " TFE for the internal command\n");
@@ -628,7 +626,7 @@ static void mtip_handle_tfe(struct drive
 			cmd->comp_func(port, MTIP_TAG_INTERNAL,
 					cmd, PORT_IRQ_TF_ERR);
 		}
-		goto handle_tfe_exit;
+		return;
 	}
 
 	/* clear the tag accumulator */
@@ -771,11 +769,6 @@ static void mtip_handle_tfe(struct drive
 		}
 	}
 	print_tags(dd, "reissued (TFE)", tagaccum, cmd_cnt);
-
-handle_tfe_exit:
-	/* clear eh_active */
-	clear_bit(MTIP_PF_EH_ACTIVE_BIT, &port->flags);
-	wake_up_interruptible(&port->svc_wait);
 }
 
 /*