ath9k: Get rid of unnecessary ATOMIC memory alloc during init time

We can sleep for memory during init time and so allocating rx buffers,
descriptro buffers with GFP_KERNEL should help us to get rid of transient
alloc fails.

Signed-off-by: Senthil Balasubramanian <senthilkumar@atheros.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
diff --git a/drivers/net/wireless/ath9k/main.c b/drivers/net/wireless/ath9k/main.c
index bb30ccc..4bc43db 100644
--- a/drivers/net/wireless/ath9k/main.c
+++ b/drivers/net/wireless/ath9k/main.c
@@ -1804,7 +1804,7 @@
 
 	/* allocate descriptors */
 	dd->dd_desc = dma_alloc_coherent(sc->dev, dd->dd_desc_len,
-					 &dd->dd_desc_paddr, GFP_ATOMIC);
+					 &dd->dd_desc_paddr, GFP_KERNEL);
 	if (dd->dd_desc == NULL) {
 		error = -ENOMEM;
 		goto fail;
@@ -1816,12 +1816,11 @@
 
 	/* allocate buffers */
 	bsize = sizeof(struct ath_buf) * nbuf;
-	bf = kmalloc(bsize, GFP_KERNEL);
+	bf = kzalloc(bsize, GFP_KERNEL);
 	if (bf == NULL) {
 		error = -ENOMEM;
 		goto fail2;
 	}
-	memset(bf, 0, bsize);
 	dd->dd_bufptr = bf;
 
 	INIT_LIST_HEAD(head);