Re: [PATCH 2/3] ath10k: use dma_zalloc_coherent()

Joe Perches [off-list ref] writes:

On Mon, 2017-01-23 at 15:04 +0000, Srinivas Kandagatla wrote:

quoted

use dma_zalloc_coherent() instead of dma_alloc_coherent and memset().

[]

quoted

diff --git a/drivers/net/wireless/ath/ath10k/pci.c b/drivers/net/wireless/ath/ath10k/pci.c

[]

quoted

@@ -896,7 +896,7 @@ static int ath10k_pci_diag_read_mem(struct ath10k *ar, u32 address, void *data,
 	 */
 	alloc_nbytes = min_t(unsigned int, nbytes, DIAG_TRANSFER_LIMIT);
 
-	data_buf = (unsigned char *)dma_alloc_coherent(ar->dev,
+	data_buf = (unsigned char *)dma_zalloc_coherent(ar->dev,
 						       alloc_nbytes,
 						       &ce_data_base,
 						       GFP_ATOMIC);

trivia:

Nicer to realign arguments and remove the unnecessary cast.

Perhaps:

	data_buf = dma_zalloc_coherent(ar->dev, alloc_nbytes, &ce_data_base,
				       GFP_ATOMIC);

Sure, but that should be in a separate patch.

-- 
Kalle Valo

On Tue, 2017-01-24 at 05:18 +0000, Valo, Kalle wrote:

Joe Perches [off-list ref] writes:

quoted

On Mon, 2017-01-23 at 15:04 +0000, Srinivas Kandagatla wrote:

quoted

use dma_zalloc_coherent() instead of dma_alloc_coherent and memset().

[]

quoted

diff --git a/drivers/net/wireless/ath/ath10k/pci.c b/drivers/net/wireless/ath/ath10k/pci.c

[]

quoted

@@ -896,7 +896,7 @@ static int ath10k_pci_diag_read_mem(struct ath10k *ar, u32 address, void *data,
 	 */
 	alloc_nbytes = min_t(unsigned int, nbytes, DIAG_TRANSFER_LIMIT);
 
-	data_buf = (unsigned char *)dma_alloc_coherent(ar->dev,
+	data_buf = (unsigned char *)dma_zalloc_coherent(ar->dev,
 						       alloc_nbytes,
 						       &ce_data_base,
 						       GFP_ATOMIC);

trivia:

Nicer to realign arguments and remove the unnecessary cast.

Perhaps:

	data_buf = dma_zalloc_coherent(ar->dev, alloc_nbytes, &ce_data_base,
				       GFP_ATOMIC);

Sure, but that should be in a separate patch.

I don't think so, trivial patches can be combined.

It's also nicer to realign all modified multiline
arguments when performing these changes.

Coccinelle generally does it automatically.