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, 5 deletions

diff --git a/drivers/net/irda/smsc-ircc2.c b/drivers/net/irda/smsc-ircc2.c
index 59b45c10adbc..aa05dad75335 100644
--- a/drivers/net/irda/smsc-ircc2.c
+++ b/drivers/net/irda/smsc-ircc2.c
@@ -563,19 +563,16 @@ static int smsc_ircc_open(unsigned int fir_base, unsigned int sir_base, u8 dma,
 
         self->rx_buff.head =
                 dma_alloc_coherent(NULL, self->rx_buff.truesize,
-                                   &self->rx_buff_dma, GFP_KERNEL);
+                                   &self->rx_buff_dma, GFP_KERNEL | __GFP_ZERO);
         if (self->rx_buff.head == NULL)
                 goto err_out2;
 
         self->tx_buff.head =
                 dma_alloc_coherent(NULL, self->tx_buff.truesize,
-                                   &self->tx_buff_dma, GFP_KERNEL);
+                                   &self->tx_buff_dma, GFP_KERNEL | __GFP_ZERO);
         if (self->tx_buff.head == NULL)
                 goto err_out3;
 
-        memset(self->rx_buff.head, 0, self->rx_buff.truesize);
-        memset(self->tx_buff.head, 0, self->tx_buff.truesize);
-
         self->rx_buff.in_frame = FALSE;
         self->rx_buff.state = OUTSIDE_FRAME;
         self->tx_buff.data = self->tx_buff.head;