From: kernel test robot <lkp@intel.com>
To: kbuild@lists.01.org
Subject: drivers/net/can/m_can/m_can.c:1034 m_can_echo_tx_event() error: uninitialized symbol 'txe'.
Date: Tue, 07 Dec 2021 19:32:31 +0800 [thread overview]
Message-ID: <202112071909.sQoYNqGo-lkp@intel.com> (raw)
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CC: kbuild-all(a)lists.01.org
CC: linux-kernel(a)vger.kernel.org
TO: Matt Kline <matt@bitbashing.io>
CC: "Marc Kleine-Budde" <mkl@pengutronix.de>
tree: https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git master
head: cd8c917a56f20f48748dd43d9ae3caff51d5b987
commit: e39381770ec9ca3c51d8b9bd9cc6e01d78ea974a can: m_can: Disable IRQs on FIFO bus errors
date: 4 months ago
:::::: branch date: 11 hours ago
:::::: commit date: 4 months ago
config: arc-randconfig-m031-20211207 (https://download.01.org/0day-ci/archive/20211207/202112071909.sQoYNqGo-lkp(a)intel.com/config)
compiler: arceb-elf-gcc (GCC) 11.2.0
If you fix the issue, kindly add following tag as appropriate
Reported-by: kernel test robot <lkp@intel.com>
Reported-by: Dan Carpenter <dan.carpenter@oracle.com>
New smatch warnings:
drivers/net/can/m_can/m_can.c:1034 m_can_echo_tx_event() error: uninitialized symbol 'txe'.
Old smatch warnings:
drivers/net/can/m_can/m_can.c:477 m_can_read_fifo() error: uninitialized symbol 'dlc'.
drivers/net/can/m_can/m_can.c:495 m_can_read_fifo() error: uninitialized symbol 'id'.
vim +/txe +1034 drivers/net/can/m_can/m_can.c
1be37d3b0414e3 Torin Cooper-Bennun 2021-03-08 1002
e39381770ec9ca Matt Kline 2021-08-16 1003 static int m_can_echo_tx_event(struct net_device *dev)
10c1c3975a6663 Mario Huettel 2017-04-08 1004 {
10c1c3975a6663 Mario Huettel 2017-04-08 1005 u32 txe_count = 0;
10c1c3975a6663 Mario Huettel 2017-04-08 1006 u32 m_can_txefs;
10c1c3975a6663 Mario Huettel 2017-04-08 1007 u32 fgi = 0;
10c1c3975a6663 Mario Huettel 2017-04-08 1008 int i = 0;
10c1c3975a6663 Mario Huettel 2017-04-08 1009 unsigned int msg_mark;
10c1c3975a6663 Mario Huettel 2017-04-08 1010
441ac340169b79 Dan Murphy 2019-05-09 1011 struct m_can_classdev *cdev = netdev_priv(dev);
10c1c3975a6663 Mario Huettel 2017-04-08 1012
10c1c3975a6663 Mario Huettel 2017-04-08 1013 /* read tx event fifo status */
441ac340169b79 Dan Murphy 2019-05-09 1014 m_can_txefs = m_can_read(cdev, M_CAN_TXEFS);
10c1c3975a6663 Mario Huettel 2017-04-08 1015
10c1c3975a6663 Mario Huettel 2017-04-08 1016 /* Get Tx Event fifo element count */
20779943a080c5 Torin Cooper-Bennun 2021-05-04 1017 txe_count = FIELD_GET(TXEFS_EFFL_MASK, m_can_txefs);
10c1c3975a6663 Mario Huettel 2017-04-08 1018
10c1c3975a6663 Mario Huettel 2017-04-08 1019 /* Get and process all sent elements */
10c1c3975a6663 Mario Huettel 2017-04-08 1020 for (i = 0; i < txe_count; i++) {
1be37d3b0414e3 Torin Cooper-Bennun 2021-03-08 1021 u32 txe, timestamp = 0;
e39381770ec9ca Matt Kline 2021-08-16 1022 int err;
1be37d3b0414e3 Torin Cooper-Bennun 2021-03-08 1023
10c1c3975a6663 Mario Huettel 2017-04-08 1024 /* retrieve get index */
20779943a080c5 Torin Cooper-Bennun 2021-05-04 1025 fgi = FIELD_GET(TXEFS_EFGI_MASK, m_can_read(cdev, M_CAN_TXEFS));
10c1c3975a6663 Mario Huettel 2017-04-08 1026
1be37d3b0414e3 Torin Cooper-Bennun 2021-03-08 1027 /* get message marker, timestamp */
e39381770ec9ca Matt Kline 2021-08-16 1028 err = m_can_txe_fifo_read(cdev, fgi, 4, &txe);
e39381770ec9ca Matt Kline 2021-08-16 1029 if (err) {
e39381770ec9ca Matt Kline 2021-08-16 1030 netdev_err(dev, "TXE FIFO read returned %d\n", err);
e39381770ec9ca Matt Kline 2021-08-16 1031 return err;
e39381770ec9ca Matt Kline 2021-08-16 1032 }
e39381770ec9ca Matt Kline 2021-08-16 1033
20779943a080c5 Torin Cooper-Bennun 2021-05-04 @1034 msg_mark = FIELD_GET(TX_EVENT_MM_MASK, txe);
1be37d3b0414e3 Torin Cooper-Bennun 2021-03-08 1035 timestamp = FIELD_GET(TX_EVENT_TXTS_MASK, txe);
10c1c3975a6663 Mario Huettel 2017-04-08 1036
10c1c3975a6663 Mario Huettel 2017-04-08 1037 /* ack txe element */
20779943a080c5 Torin Cooper-Bennun 2021-05-04 1038 m_can_write(cdev, M_CAN_TXEFA, FIELD_PREP(TXEFA_EFAI_MASK,
20779943a080c5 Torin Cooper-Bennun 2021-05-04 1039 fgi));
10c1c3975a6663 Mario Huettel 2017-04-08 1040
10c1c3975a6663 Mario Huettel 2017-04-08 1041 /* update stats */
1be37d3b0414e3 Torin Cooper-Bennun 2021-03-08 1042 m_can_tx_update_stats(cdev, msg_mark, timestamp);
10c1c3975a6663 Mario Huettel 2017-04-08 1043 }
e39381770ec9ca Matt Kline 2021-08-16 1044
e39381770ec9ca Matt Kline 2021-08-16 1045 return 0;
10c1c3975a6663 Mario Huettel 2017-04-08 1046 }
10c1c3975a6663 Mario Huettel 2017-04-08 1047
:::::: The code@line 1034 was first introduced by commit
:::::: 20779943a080c5ac9b9e291b76afbac12fdec023 can: m_can: use bits.h macros for all regmasks
:::::: TO: Torin Cooper-Bennun <torin@maxiluxsystems.com>
:::::: CC: Marc Kleine-Budde <mkl@pengutronix.de>
---
0-DAY CI Kernel Test Service, Intel Corporation
https://lists.01.org/hyperkitty/list/kbuild-all(a)lists.01.org
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