linux-kernel - drivers/net/can/usb/etas_es58x/es58x_fd.c:174:8: warning: Uninitialized variable: rx_event

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Message-ID: <5f13b914-e309-49ee-4f98-c81780c478b9@intel.com>
Date:   Wed, 2 Mar 2022 17:47:08 +0800
From:   kernel test robot <yujie.liu@...el.com>
To:     Vincent Mailhol <mailhol.vincent@...adoo.fr>
CC:     <kbuild-all@...ts.01.org>,
        Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
        Marc Kleine-Budde <mkl@...gutronix.de>,
        Arunachalam Santhanam <arunachalam.santhanam@...bosch.com>
Subject: drivers/net/can/usb/etas_es58x/es58x_fd.c:174:8: warning:
 Uninitialized variable: rx_event_msg [uninitvar]

tree:   https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git master
head:   575115360652e9920cc56a028a286ebe9bf82694
commit: c664e2137a27680922d8aeb64fb10313416b254f can: etas_es58x: add support for the ETAS ES58X_FD CAN USB interfaces
date:   11 months ago
compiler: powerpc64-linux-gcc (GCC) 11.2.0

If you fix the issue, kindly add following tag as appropriate
Reported-by: kernel test robot <yujie.liu@...el.com>


cppcheck possible warnings: (new ones prefixed by >>, may not be real problems)

    In file included from drivers/net/can/usb/etas_es58x/es58x_fd.c:
 >> drivers/net/can/usb/etas_es58x/es58x_fd.c:174:8: warning: Uninitialized variable: rx_event_msg [uninitvar]
     ret = es58x_check_msg_len(es58x_dev->dev, *rx_event_msg, msg_len);
           ^

vim +174 drivers/net/can/usb/etas_es58x/es58x_fd.c

c664e2137a2768 Vincent Mailhol 2021-04-10  165
c664e2137a2768 Vincent Mailhol 2021-04-10  166  static int es58x_fd_rx_event_msg(struct net_device *netdev,
c664e2137a2768 Vincent Mailhol 2021-04-10  167  				 const struct es58x_fd_urb_cmd *es58x_fd_urb_cmd)
c664e2137a2768 Vincent Mailhol 2021-04-10  168  {
c664e2137a2768 Vincent Mailhol 2021-04-10  169  	struct es58x_device *es58x_dev = es58x_priv(netdev)->es58x_dev;
c664e2137a2768 Vincent Mailhol 2021-04-10  170  	u16 msg_len = get_unaligned_le16(&es58x_fd_urb_cmd->msg_len);
c664e2137a2768 Vincent Mailhol 2021-04-10 @171  	const struct es58x_fd_rx_event_msg *rx_event_msg;
c664e2137a2768 Vincent Mailhol 2021-04-10  172  	int ret;
c664e2137a2768 Vincent Mailhol 2021-04-10  173
c664e2137a2768 Vincent Mailhol 2021-04-10 @174  	ret = es58x_check_msg_len(es58x_dev->dev, *rx_event_msg, msg_len);
c664e2137a2768 Vincent Mailhol 2021-04-10  175  	if (ret)
c664e2137a2768 Vincent Mailhol 2021-04-10  176  		return ret;
c664e2137a2768 Vincent Mailhol 2021-04-10  177
c664e2137a2768 Vincent Mailhol 2021-04-10  178  	rx_event_msg = &es58x_fd_urb_cmd->rx_event_msg;
c664e2137a2768 Vincent Mailhol 2021-04-10  179
c664e2137a2768 Vincent Mailhol 2021-04-10  180  	return es58x_rx_err_msg(netdev, rx_event_msg->error_code,
c664e2137a2768 Vincent Mailhol 2021-04-10  181  				rx_event_msg->event_code,
c664e2137a2768 Vincent Mailhol 2021-04-10  182  				get_unaligned_le64(&rx_event_msg->timestamp));
c664e2137a2768 Vincent Mailhol 2021-04-10  183  }
c664e2137a2768 Vincent Mailhol 2021-04-10  184

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