[PATCH 1/3] iscsi-target: Use kcalloc() in iscsit_allocate_iovecs()

SF Markus Elfring
2017-04-09T14:24:40Z

Date: Sun, 9 Apr 2017 15:06:00 +0200

* A multiplication for the size determination of a memory allocation
indicated that an array data structure should be processed.
Thus use the corresponding function "kcalloc".

This issue was detected by using the Coccinelle software.

* Replace the specification of a data structure by a pointer dereference
to make the corresponding size determination a bit safer according to
the Linux coding style convention.

Signed-off-by: Markus Elfring <elfring@users.sourceforge.net>
---
drivers/target/iscsi/iscsi_target.c | 3 +--
1 file changed, 1 insertion(+), 2 deletions(-)

diff --git a/drivers/target/iscsi/iscsi_target.c b/drivers/target/iscsi/iscsi_target.c
index a91802432f2f..536b939afe9d 100644
--- a/drivers/target/iscsi/iscsi_target.c
+++ b/drivers/target/iscsi/iscsi_target.c
@@ -985,8 +985,7 @@ static int iscsit_allocate_iovecs(struct iscsi_cmd *cmd)
u32 iov_count = max(1UL, DIV_ROUND_UP(cmd->se_cmd.data_length, PAGE_SIZE));

iov_count += ISCSI_IOV_DATA_BUFFER;
-
- cmd->iov_data = kzalloc(iov_count * sizeof(struct kvec), GFP_KERNEL);
+ cmd->iov_data = kcalloc(iov_count, sizeof(*cmd->iov_data), GFP_KERNEL);
if (!cmd->iov_data) {
pr_err("Unable to allocate cmd->iov_data\n");
return -ENOMEM;
--
2.12.2