linux-kernel - RE: [PATCH 8/9] scsi: bfa: Use zeroing allocator rather than allocator/memset

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Date:   Tue, 2 Jan 2018 05:40:58 +0000
From:   "Gurumurthy, Anil" <Anil.Gurumurthy@...ium.com>
To:     Himanshu Jha <himanshujha199640@...il.com>,
        "jejb@...ux.vnet.ibm.com" <jejb@...ux.vnet.ibm.com>,
        "martin.petersen@...cle.com" <martin.petersen@...cle.com>,
        "aacraid@...ptec.com" <aacraid@...ptec.com>
CC:     "Kalluru, Sudarsana" <Sudarsana.Kalluru@...ium.com>,
        Dept-Eng QLogic Storage Upstream 
        <QLogic-Storage-Upstream@...ium.com>,
        "satishkh@...co.com" <satishkh@...co.com>,
        "sebaddel@...co.com" <sebaddel@...co.com>,
        "kartilak@...co.com" <kartilak@...co.com>,
        Dept-Eng QLogic Storage Upstream 
        <QLogic-Storage-Upstream@...ium.com>,
        Dept-Eng QLA2xxx Upstream <qla2xxx-upstream@...ium.com>,
        "linux-scsi@...r.kernel.org" <linux-scsi@...r.kernel.org>,
        "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>
Subject: RE: [PATCH 8/9] scsi: bfa: Use zeroing allocator rather than
 allocator/memset



-----Original Message-----
From: Himanshu Jha [mailto:himanshujha199640@...il.com] 
Sent: 30 December 2017 20:59
To: jejb@...ux.vnet.ibm.com; martin.petersen@...cle.com; aacraid@...ptec.com
Cc: Gurumurthy, Anil <Anil.Gurumurthy@...ium.com>; Kalluru, Sudarsana <Sudarsana.Kalluru@...ium.com>; Dept-Eng QLogic Storage Upstream <QLogic-Storage-Upstream@...ium.com>; satishkh@...co.com; sebaddel@...co.com; kartilak@...co.com; Dept-Eng QLogic Storage Upstream <QLogic-Storage-Upstream@...ium.com>; Dept-Eng QLA2xxx Upstream <qla2xxx-upstream@...ium.com>; linux-scsi@...r.kernel.org; linux-kernel@...r.kernel.org; Himanshu Jha <himanshujha199640@...il.com>
Subject: [PATCH 8/9] scsi: bfa: Use zeroing allocator rather than allocator/memset

Use vzalloc instead of vmalloc followed by memset 0.

Generated-by: scripts/coccinelle/api/alloc/kzalloc-simple.cocci

Suggested-by: Luis R. Rodriguez <mcgrof@...nel.org>
Signed-off-by: Himanshu Jha <himanshujha199640@...il.com>
---
 drivers/scsi/bfa/bfad.c         | 3 +--
 drivers/scsi/bfa/bfad_debugfs.c | 8 ++------
 2 files changed, 3 insertions(+), 8 deletions(-)

diff --git a/drivers/scsi/bfa/bfad.c b/drivers/scsi/bfa/bfad.c index bac18f6..bd7e6a6f 100644
--- a/drivers/scsi/bfa/bfad.c
+++ b/drivers/scsi/bfa/bfad.c
@@ -610,13 +610,12 @@ bfad_hal_mem_alloc(struct bfad_s *bfad)
 	/* Iterate through the KVA meminfo queue */
 	list_for_each(km_qe, &kva_info->qe) {
 		kva_elem = (struct bfa_mem_kva_s *) km_qe;
-		kva_elem->kva = vmalloc(kva_elem->mem_len);
+		kva_elem->kva = vzalloc(kva_elem->mem_len);
 		if (kva_elem->kva == NULL) {
 			bfad_hal_mem_release(bfad);
 			rc = BFA_STATUS_ENOMEM;
 			goto ext;
 		}
-		memset(kva_elem->kva, 0, kva_elem->mem_len);
 	}
 
 	/* Iterate through the DMA meminfo queue */ diff --git a/drivers/scsi/bfa/bfad_debugfs.c b/drivers/scsi/bfa/bfad_debugfs.c index 05f5239..349cfe7 100644
--- a/drivers/scsi/bfa/bfad_debugfs.c
+++ b/drivers/scsi/bfa/bfad_debugfs.c
@@ -81,7 +81,7 @@ bfad_debugfs_open_fwtrc(struct inode *inode, struct file *file)
 
 	fw_debug->buffer_len = sizeof(struct bfa_trc_mod_s);
 
-	fw_debug->debug_buffer = vmalloc(fw_debug->buffer_len);
+	fw_debug->debug_buffer = vzalloc(fw_debug->buffer_len);
 	if (!fw_debug->debug_buffer) {
 		kfree(fw_debug);
 		printk(KERN_INFO "bfad[%d]: Failed to allocate fwtrc buffer\n", @@ -89,8 +89,6 @@ bfad_debugfs_open_fwtrc(struct inode *inode, struct file *file)
 		return -ENOMEM;
 	}
 
-	memset(fw_debug->debug_buffer, 0, fw_debug->buffer_len);
-
 	spin_lock_irqsave(&bfad->bfad_lock, flags);
 	rc = bfa_ioc_debug_fwtrc(&bfad->bfa.ioc,
 			fw_debug->debug_buffer,
@@ -125,7 +123,7 @@ bfad_debugfs_open_fwsave(struct inode *inode, struct file *file)
 
 	fw_debug->buffer_len = sizeof(struct bfa_trc_mod_s);
 
-	fw_debug->debug_buffer = vmalloc(fw_debug->buffer_len);
+	fw_debug->debug_buffer = vzalloc(fw_debug->buffer_len);
 	if (!fw_debug->debug_buffer) {
 		kfree(fw_debug);
 		printk(KERN_INFO "bfad[%d]: Failed to allocate fwsave buffer\n", @@ -133,8 +131,6 @@ bfad_debugfs_open_fwsave(struct inode *inode, struct file *file)
 		return -ENOMEM;
 	}
 
-	memset(fw_debug->debug_buffer, 0, fw_debug->buffer_len);
-
 	spin_lock_irqsave(&bfad->bfad_lock, flags);
 	rc = bfa_ioc_debug_fwsave(&bfad->bfa.ioc,
 			fw_debug->debug_buffer,
--
2.7.4

Acked by: Anil Gurumurthy <anil.gurumurthy@...ium.com>