6:52 p.m.
Hello,
Does the lock taken on line 38 need to be released on line 53?
julia
---------- Forwarded message ----------
Date: Tue, 9 Jun 2020 16:19:41 +0800
From: kernel test robot <lkp(a)intel.com>
To: kbuild(a)lists.01.org
Cc: lkp(a)intel.com, Julia Lawall <julia.lawall(a)lip6.fr>
Subject: drivers/staging/wfx/hif_tx.c:53:2-8: preceding lock on line 38
CC: kbuild-all(a)lists.01.org
CC: linux-kernel(a)vger.kernel.org
TO: "Jérôme Pouiller" <jerome.pouiller(a)silabs.com>
CC: "Greg Kroah-Hartman" <gregkh(a)linuxfoundation.org>
tree: https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git master
head: abfbb29297c27e3f101f348dc9e467b0fe70f919
commit: 4f8b7fabb15df3658564a98971fc67029be1815d staging: wfx: allow to send commands to
chip
date: 8 months ago
:::::: branch date: 12 hours ago
:::::: commit date: 8 months ago
config: i386-randconfig-c024-20200607 (attached as .config)
compiler: gcc-9 (Debian 9.3.0-13) 9.3.0
If you fix the issue, kindly add following tag as appropriate
Reported-by: kernel test robot <lkp(a)intel.com>
Reported-by: Julia Lawall <julia.lawall(a)lip6.fr>
coccinelle warnings: (new ones prefixed by >>)
> drivers/staging/wfx/hif_tx.c:53:2-8: preceding lock on line 38
#
https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit...
git remote add linus https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
git remote update linus
git checkout 4f8b7fabb15df3658564a98971fc67029be1815d
vim +53 drivers/staging/wfx/hif_tx.c
4f8b7fabb15df3 Jérôme Pouiller 2019-09-19 23
4f8b7fabb15df3 Jérôme Pouiller 2019-09-19 24 int wfx_cmd_send(struct wfx_dev *wdev,
struct hif_msg *request, void *reply, size_t reply_len, bool async)
4f8b7fabb15df3 Jérôme Pouiller 2019-09-19 25 {
4f8b7fabb15df3 Jérôme Pouiller 2019-09-19 26 const char *mib_name = "";
4f8b7fabb15df3 Jérôme Pouiller 2019-09-19 27 const char *mib_sep = "";
4f8b7fabb15df3 Jérôme Pouiller 2019-09-19 28 int cmd = request->id;
4f8b7fabb15df3 Jérôme Pouiller 2019-09-19 29 int vif = request->interface;
4f8b7fabb15df3 Jérôme Pouiller 2019-09-19 30 int ret;
4f8b7fabb15df3 Jérôme Pouiller 2019-09-19 31
4f8b7fabb15df3 Jérôme Pouiller 2019-09-19 32 WARN(wdev->hif_cmd.buf_recv &&
wdev->hif_cmd.async, "API usage error");
4f8b7fabb15df3 Jérôme Pouiller 2019-09-19 33
4f8b7fabb15df3 Jérôme Pouiller 2019-09-19 34 // Do not wait for any reply if chip is
frozen
4f8b7fabb15df3 Jérôme Pouiller 2019-09-19 35 if (wdev->chip_frozen)
4f8b7fabb15df3 Jérôme Pouiller 2019-09-19 36 return -ETIMEDOUT;
4f8b7fabb15df3 Jérôme Pouiller 2019-09-19 37
4f8b7fabb15df3 Jérôme Pouiller 2019-09-19 @38 mutex_lock(&wdev->hif_cmd.lock);
4f8b7fabb15df3 Jérôme Pouiller 2019-09-19 39 WARN(wdev->hif_cmd.buf_send, "data
locking error");
4f8b7fabb15df3 Jérôme Pouiller 2019-09-19 40
4f8b7fabb15df3 Jérôme Pouiller 2019-09-19 41 // Note: call to complete() below has an
implicit memory barrier that
4f8b7fabb15df3 Jérôme Pouiller 2019-09-19 42 // hopefully protect buf_send
4f8b7fabb15df3 Jérôme Pouiller 2019-09-19 43 wdev->hif_cmd.buf_send = request;
4f8b7fabb15df3 Jérôme Pouiller 2019-09-19 44 wdev->hif_cmd.buf_recv = reply;
4f8b7fabb15df3 Jérôme Pouiller 2019-09-19 45 wdev->hif_cmd.len_recv = reply_len;
4f8b7fabb15df3 Jérôme Pouiller 2019-09-19 46 wdev->hif_cmd.async = async;
4f8b7fabb15df3 Jérôme Pouiller 2019-09-19 47 complete(&wdev->hif_cmd.ready);
4f8b7fabb15df3 Jérôme Pouiller 2019-09-19 48
4f8b7fabb15df3 Jérôme Pouiller 2019-09-19 49 wfx_bh_request_tx(wdev);
4f8b7fabb15df3 Jérôme Pouiller 2019-09-19 50
4f8b7fabb15df3 Jérôme Pouiller 2019-09-19 51 // NOTE: no timeout is catched async is
enabled
4f8b7fabb15df3 Jérôme Pouiller 2019-09-19 52 if (async)
4f8b7fabb15df3 Jérôme Pouiller 2019-09-19 @53 return 0;
---
0-DAY CI Kernel Test Service, Intel Corporation
https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org