drivers:net: dma_alloc_coherent: use __GFP_ZERO instead of memset(, 0)

Reduce the number of calls required to alloc
a zeroed block of memory.

Trivially reduces overall object size.

Other changes around these removals
o Neaten call argument alignment
o Remove an unnecessary OOM message after dma_alloc_coherent failure
o Remove unnecessary gfp_t stack variable

Signed-off-by: Joe Perches <joe@perches.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

1 files changed, 2 insertions, 4 deletions

diff --git a/drivers/net/irda/via-ircc.c b/drivers/net/irda/via-ircc.c
index f9033c6a888c..51f2bc376101 100644
--- a/drivers/net/irda/via-ircc.c
+++ b/drivers/net/irda/via-ircc.c
@@ -364,21 +364,19 @@ static int via_ircc_open(struct pci_dev *pdev, chipio_t *info, unsigned int id)
         /* Allocate memory if needed */
         self->rx_buff.head =
                 dma_alloc_coherent(&pdev->dev, self->rx_buff.truesize,
-                                   &self->rx_buff_dma, GFP_KERNEL);
+                                   &self->rx_buff_dma, GFP_KERNEL | __GFP_ZERO);
         if (self->rx_buff.head == NULL) {
                 err = -ENOMEM;
                 goto err_out2;
         }
-        memset(self->rx_buff.head, 0, self->rx_buff.truesize);
 
         self->tx_buff.head =
                 dma_alloc_coherent(&pdev->dev, self->tx_buff.truesize,
-                                   &self->tx_buff_dma, GFP_KERNEL);
+                                   &self->tx_buff_dma, GFP_KERNEL | __GFP_ZERO);
         if (self->tx_buff.head == NULL) {
                 err = -ENOMEM;
                 goto err_out3;
         }
-        memset(self->tx_buff.head, 0, self->tx_buff.truesize);
 
         self->rx_buff.in_frame = FALSE;
         self->rx_buff.state = OUTSIDE_FRAME;