[PATCH] NVMe: replace kmalloc and memset with kzalloc.

[Verma, Vishal L]

Hi Alexandru,

This patch has already been applied:
http://git.infradead.org/users/willy/linux-nvme.git/commitdiff/03ea83e9a37e
41d436f8348e6eee3d8281bfff3a


It was submitted on the LKML on 6/9 by Tushar Behera.

Thanks,
-Vishal

On 7/12/13 9:16 AM, "Alexandru Juncu" <alexj at rosedu.org> wrote:

>Found using coccinelle.
>
>Signed-off-by: Alexandru Juncu <alexj at rosedu.org>
>---
> drivers/block/nvme-scsi.c | 24 ++++++++----------------
> 1 file changed, 8 insertions(+), 16 deletions(-)
>
>diff --git a/drivers/block/nvme-scsi.c b/drivers/block/nvme-scsi.c
>index 102de2f..4a4ff4e 100644
>--- a/drivers/block/nvme-scsi.c
>+++ b/drivers/block/nvme-scsi.c
>@@ -933,13 +933,12 @@ static int nvme_trans_bdev_char_page(struct nvme_ns
>*ns, struct sg_io_hdr *hdr,
> 	int res = SNTI_TRANSLATION_SUCCESS;
> 	int xfer_len;
> 
>-	inq_response = kmalloc(EXTENDED_INQUIRY_DATA_PAGE_LENGTH, GFP_KERNEL);
>+	inq_response = kzalloc(EXTENDED_INQUIRY_DATA_PAGE_LENGTH, GFP_KERNEL);
> 	if (inq_response == NULL) {
> 		res = -ENOMEM;
> 		goto out_mem;
> 	}
> 
>-	memset(inq_response, 0, EXTENDED_INQUIRY_DATA_PAGE_LENGTH);
> 	inq_response[1] = INQ_BDEV_CHARACTERISTICS_PAGE;    /* Page Code */
> 	inq_response[2] = 0x00;    /* Page Length MSB */
> 	inq_response[3] = 0x3C;    /* Page Length LSB */
>@@ -964,12 +963,11 @@ static int nvme_trans_log_supp_pages(struct nvme_ns
>*ns, struct sg_io_hdr *hdr,
> 	int xfer_len;
> 	u8 *log_response;
> 
>-	log_response = kmalloc(LOG_PAGE_SUPPORTED_LOG_PAGES_LENGTH, GFP_KERNEL);
>+	log_response = kzalloc(LOG_PAGE_SUPPORTED_LOG_PAGES_LENGTH, GFP_KERNEL);
> 	if (log_response == NULL) {
> 		res = -ENOMEM;
> 		goto out_mem;
> 	}
>-	memset(log_response, 0, LOG_PAGE_SUPPORTED_LOG_PAGES_LENGTH);
> 
> 	log_response[0] = LOG_PAGE_SUPPORTED_LOG_PAGES_PAGE;
> 	/* Subpage=0x00, Page Length MSB=0 */
>@@ -1000,12 +998,11 @@ static int nvme_trans_log_info_exceptions(struct
>nvme_ns *ns,
> 	u8 temp_c;
> 	u16 temp_k;
> 
>-	log_response = kmalloc(LOG_INFO_EXCP_PAGE_LENGTH, GFP_KERNEL);
>+	log_response = kzalloc(LOG_INFO_EXCP_PAGE_LENGTH, GFP_KERNEL);
> 	if (log_response == NULL) {
> 		res = -ENOMEM;
> 		goto out_mem;
> 	}
>-	memset(log_response, 0, LOG_INFO_EXCP_PAGE_LENGTH);
> 
> 	mem = dma_alloc_coherent(&dev->pci_dev->dev,
> 					sizeof(struct nvme_smart_log),
>@@ -1069,12 +1066,11 @@ static int nvme_trans_log_temperature(struct
>nvme_ns *ns, struct sg_io_hdr *hdr,
> 	u8 temp_c_cur, temp_c_thresh;
> 	u16 temp_k;
> 
>-	log_response = kmalloc(LOG_TEMP_PAGE_LENGTH, GFP_KERNEL);
>+	log_response = kzalloc(LOG_TEMP_PAGE_LENGTH, GFP_KERNEL);
> 	if (log_response == NULL) {
> 		res = -ENOMEM;
> 		goto out_mem;
> 	}
>-	memset(log_response, 0, LOG_TEMP_PAGE_LENGTH);
> 
> 	mem = dma_alloc_coherent(&dev->pci_dev->dev,
> 					sizeof(struct nvme_smart_log),
>@@ -1380,12 +1376,11 @@ static int nvme_trans_mode_page_create(struct
>nvme_ns *ns,
> 	blk_desc_offset = mph_size;
> 	mode_pages_offset_1 = blk_desc_offset + blk_desc_len;
> 
>-	response = kmalloc(resp_size, GFP_KERNEL);
>+	response = kzalloc(resp_size, GFP_KERNEL);
> 	if (response == NULL) {
> 		res = -ENOMEM;
> 		goto out_mem;
> 	}
>-	memset(response, 0, resp_size);
> 
> 	res = nvme_trans_fill_mode_parm_hdr(&response[0], mph_size, cdb10,
> 					llbaa, mode_data_length, blk_desc_len);
>@@ -2480,12 +2475,11 @@ static int nvme_trans_read_capacity(struct
>nvme_ns *ns, struct sg_io_hdr *hdr,
> 	}
> 	id_ns = mem;
> 
>-	response = kmalloc(resp_size, GFP_KERNEL);
>+	response = kzalloc(resp_size, GFP_KERNEL);
> 	if (response == NULL) {
> 		res = -ENOMEM;
> 		goto out_dma;
> 	}
>-	memset(response, 0, resp_size);
> 	nvme_trans_fill_read_cap(response, id_ns, cdb16);
> 
> 	xfer_len = min(alloc_len, resp_size);
>@@ -2554,12 +2548,11 @@ static int nvme_trans_report_luns(struct nvme_ns
>*ns, struct sg_io_hdr *hdr,
> 			goto out_dma;
> 		}
> 
>-		response = kmalloc(resp_size, GFP_KERNEL);
>+		response = kzalloc(resp_size, GFP_KERNEL);
> 		if (response == NULL) {
> 			res = -ENOMEM;
> 			goto out_dma;
> 		}
>-		memset(response, 0, resp_size);
> 
> 		/* The first LUN ID will always be 0 per the SAM spec */
> 		for (lun_id = 0; lun_id < le32_to_cpu(id_ctrl->nn); lun_id++) {
>@@ -2600,12 +2593,11 @@ static int nvme_trans_request_sense(struct
>nvme_ns *ns, struct sg_io_hdr *hdr,
> 
> 	resp_size = ((desc_format) ? (DESC_FMT_SENSE_DATA_SIZE) :
> 					(FIXED_FMT_SENSE_DATA_SIZE));
>-	response = kmalloc(resp_size, GFP_KERNEL);
>+	response = kzalloc(resp_size, GFP_KERNEL);
> 	if (response == NULL) {
> 		res = -ENOMEM;
> 		goto out;
> 	}
>-	memset(response, 0, resp_size);
> 
> 	if (desc_format == DESCRIPTOR_FORMAT_SENSE_DATA_TYPE) {
> 		/* Descriptor Format Sense Data */
>-- 
>1.8.1.2
>
>
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