linux-kernel - [PATCH v2] usbip: tools: usbipd: use ARRAY

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Date:   Fri, 11 Jun 2021 18:15:10 +0800
From:   Jiapeng Chong <jiapeng.chong@...ux.alibaba.com>
To:     valentina.manea.m@...il.com
Cc:     shuah@...nel.org, linux-usb@...r.kernel.org,
        linux-kernel@...r.kernel.org,
        Jiapeng Chong <jiapeng.chong@...ux.alibaba.com>
Subject: [PATCH v2] usbip: tools: usbipd: use ARRAY_SIZE for sockfdlist

Use ARRAY_SIZE instead of dividing sizeof array with sizeof an
element.

Clean up the following coccicheck warning:

./tools/usb/usbip/src/usbipd.c:536:19-20: WARNING: Use ARRAY_SIZE.

Reported-by: Abaci Robot <abaci@...ux.alibaba.com>
Signed-off-by: Jiapeng Chong <jiapeng.chong@...ux.alibaba.com>
---
Changes in v2:
  -Add ARRAY_SIZE definition to usbip_common.h file.

 tools/usb/usbip/libsrc/usbip_common.h | 2 ++
 tools/usb/usbip/src/usbipd.c          | 3 +--
 2 files changed, 3 insertions(+), 2 deletions(-)

diff --git a/tools/usb/usbip/libsrc/usbip_common.h b/tools/usb/usbip/libsrc/usbip_common.h
index 73a367a..4e12dc4 100644
--- a/tools/usb/usbip/libsrc/usbip_common.h
+++ b/tools/usb/usbip/libsrc/usbip_common.h
@@ -101,6 +101,8 @@
 		abort();				\
 	} while (0)
 
+#define ARRAY_SIZE(arr) (sizeof(arr) / sizeof((arr)[0]))
+
 struct usbip_usb_interface {
 	uint8_t bInterfaceClass;
 	uint8_t bInterfaceSubClass;
diff --git a/tools/usb/usbip/src/usbipd.c b/tools/usb/usbip/src/usbipd.c
index 48398a7..4826d13 100644
--- a/tools/usb/usbip/src/usbipd.c
+++ b/tools/usb/usbip/src/usbipd.c
@@ -532,8 +532,7 @@ static int do_standalone_mode(int daemonize, int ipv4, int ipv6)
 		usbip_driver_close(driver);
 		return -1;
 	}
-	nsockfd = listen_all_addrinfo(ai_head, sockfdlist,
-		sizeof(sockfdlist) / sizeof(*sockfdlist));
+	nsockfd = listen_all_addrinfo(ai_head, sockfdlist, ARRAY_SIZE(sockfdlist));
 	freeaddrinfo(ai_head);
 	if (nsockfd <= 0) {
 		err("failed to open a listening socket");
-- 
1.8.3.1