linux-kernel - [PATCH 2/6] firmware-qemu_fw_cfg: Improve a size determination in fw_cfg_register

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Date:   Sun, 18 Sep 2016 14:52:47 +0200
From:   SF Markus Elfring <elfring@...rs.sourceforge.net>
To:     qemu-devel@...gnu.org, Gabriel Somlo <somlo@....edu>,
        "Michael S. Tsirkin" <mst@...hat.com>
Cc:     LKML <linux-kernel@...r.kernel.org>,
        kernel-janitors@...r.kernel.org,
        Julia Lawall <julia.lawall@...6.fr>
Subject: [PATCH 2/6] firmware-qemu_fw_cfg: Improve a size determination in
 fw_cfg_register_file()

From: Markus Elfring <elfring@...rs.sourceforge.net>
Date: Sun, 18 Sep 2016 10:43:27 +0200

Replace the specification of a data structure by a pointer dereference
as the parameter for the operator "sizeof" to make the corresponding size
determination a bit safer according to the Linux coding style convention.

Signed-off-by: Markus Elfring <elfring@...rs.sourceforge.net>
---
 drivers/firmware/qemu_fw_cfg.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/firmware/qemu_fw_cfg.c b/drivers/firmware/qemu_fw_cfg.c
index e69653e..a229df6 100644
--- a/drivers/firmware/qemu_fw_cfg.c
+++ b/drivers/firmware/qemu_fw_cfg.c
@@ -458,7 +458,7 @@ static int fw_cfg_register_file(const struct fw_cfg_file *f)
 		return -ENOMEM;
 
 	/* set file entry information */
-	memcpy(&entry->f, f, sizeof(struct fw_cfg_file));
+	memcpy(&entry->f, f, sizeof(*f));
 
 	/* register entry under "/sys/firmware/qemu_fw_cfg/by_key/" */
 	err = kobject_init_and_add(&entry->kobj, &fw_cfg_sysfs_entry_ktype,
-- 
2.10.0