linux-kernel - [PATCH v2] staging: comedi: use kmalloc

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Message-Id: <f8a6ba45a6cb1f4fc5ed2197bbeadc59a8aa5999.1447165847.git.geliangtang@163.com>
Date:	Tue, 10 Nov 2015 22:41:34 +0800
From:	Geliang Tang <geliangtang@....com>
To:	Ian Abbott <abbotti@....co.uk>,
	H Hartley Sweeten <hsweeten@...ionengravers.com>,
	Greg Kroah-Hartman <gregkh@...uxfoundation.org>
Cc:	Geliang Tang <geliangtang@....com>, devel@...verdev.osuosl.org,
	linux-kernel@...r.kernel.org
Subject: [PATCH v2] staging: comedi: use kmalloc_array instead of kmalloc

Use kmalloc_array instead of kmalloc to allocate memory for an array.

Signed-off-by: Geliang Tang <geliangtang@....com>

---
Changes in v2:
 - preserve the existing whitespace style.
---
 drivers/staging/comedi/drivers/amplc_pci224.c | 11 +++++++----
 drivers/staging/comedi/drivers/ni_670x.c      |  5 +++--
 2 files changed, 10 insertions(+), 6 deletions(-)

diff --git a/drivers/staging/comedi/drivers/amplc_pci224.c b/drivers/staging/comedi/drivers/amplc_pci224.c
index b2f7679..cac011f 100644
--- a/drivers/staging/comedi/drivers/amplc_pci224.c
+++ b/drivers/staging/comedi/drivers/amplc_pci224.c
@@ -1022,14 +1022,17 @@ pci224_auto_attach(struct comedi_device *dev, unsigned long context_model)
 	irq = pci_dev->irq;
 
 	/* Allocate buffer to hold values for AO channel scan. */
-	devpriv->ao_scan_vals = kmalloc(sizeof(devpriv->ao_scan_vals[0]) *
-					board->ao_chans, GFP_KERNEL);
+	devpriv->ao_scan_vals = kmalloc_array(board->ao_chans,
+					      sizeof(devpriv->ao_scan_vals[0]),
+					      GFP_KERNEL);
 	if (!devpriv->ao_scan_vals)
 		return -ENOMEM;
 
 	/* Allocate buffer to hold AO channel scan order. */
-	devpriv->ao_scan_order = kmalloc(sizeof(devpriv->ao_scan_order[0]) *
-					 board->ao_chans, GFP_KERNEL);
+	devpriv->ao_scan_order =
+				kmalloc_array(board->ao_chans,
+					      sizeof(devpriv->ao_scan_order[0]),
+					      GFP_KERNEL);
 	if (!devpriv->ao_scan_order)
 		return -ENOMEM;
 
diff --git a/drivers/staging/comedi/drivers/ni_670x.c b/drivers/staging/comedi/drivers/ni_670x.c
index f4c580f..3e7271880 100644
--- a/drivers/staging/comedi/drivers/ni_670x.c
+++ b/drivers/staging/comedi/drivers/ni_670x.c
@@ -214,8 +214,9 @@ static int ni_670x_auto_attach(struct comedi_device *dev,
 	if (s->n_chan == 32) {
 		const struct comedi_lrange **range_table_list;
 
-		range_table_list = kmalloc(sizeof(struct comedi_lrange *) * 32,
-					   GFP_KERNEL);
+		range_table_list = kmalloc_array(32,
+						 sizeof(struct comedi_lrange *),
+						 GFP_KERNEL);
 		if (!range_table_list)
 			return -ENOMEM;
 		s->range_table_list = range_table_list;
-- 
2.5.0


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