linux-kernel - [PATCH] virtio_scsi: don't check for failure from mempool

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Date:   Mon, 10 Apr 2017 12:16:28 +1000
From:   NeilBrown <neilb@...e.com>
To:     "James E.J. Bottomley" <jejb@...ux.vnet.ibm.com>,
        "Martin K. Petersen" <martin.petersen@...cle.com>
Cc:     linux-scsi@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: [PATCH] virtio_scsi: don't check for failure from mempool_alloc()


mempool_alloc() cannot fail when passed GFP_NOIO or any
other gfp setting that is permitted to sleep.
So remove this pointless code.

Signed-off-by: NeilBrown <neilb@...e.com>
---
 drivers/scsi/virtio_scsi.c | 6 ------
 1 file changed, 6 deletions(-)

diff --git a/drivers/scsi/virtio_scsi.c b/drivers/scsi/virtio_scsi.c
index 939c47df73fa..7c2a5f7c5fb7 100644
--- a/drivers/scsi/virtio_scsi.c
+++ b/drivers/scsi/virtio_scsi.c
@@ -688,9 +688,6 @@ static int virtscsi_device_reset(struct scsi_cmnd *sc)
 
 	sdev_printk(KERN_INFO, sc->device, "device reset\n");
 	cmd = mempool_alloc(virtscsi_cmd_pool, GFP_NOIO);
-	if (!cmd)
-		return FAILED;
-
 	memset(cmd, 0, sizeof(*cmd));
 	cmd->sc = sc;
 	cmd->req.tmf = (struct virtio_scsi_ctrl_tmf_req){
@@ -725,9 +722,6 @@ static int virtscsi_abort(struct scsi_cmnd *sc)
 
 	scmd_printk(KERN_INFO, sc, "abort\n");
 	cmd = mempool_alloc(virtscsi_cmd_pool, GFP_NOIO);
-	if (!cmd)
-		return FAILED;
-
 	memset(cmd, 0, sizeof(*cmd));
 	cmd->sc = sc;
 	cmd->req.tmf = (struct virtio_scsi_ctrl_tmf_req){
-- 
2.12.2


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