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Subject: Re: [PATCH] ath10k: Fix lockdep assertion warning in
 ath10k_sta_statistics
From:   Kalle Valo <kvalo@codeaurora.org>
In-Reply-To: <20210202144033.1.I9e556f9fb1110d58c31d04a8a1293995fb8bb678@changeid>
References: <20210202144033.1.I9e556f9fb1110d58c31d04a8a1293995fb8bb678@changeid>
To:     Anand K Mistry <amistry@google.com>
Cc:     ath10k@lists.infradead.org, Anand K Mistry <amistry@google.com>,
        "David S. Miller" <davem@davemloft.net>,
        Jakub Kicinski <kuba@kernel.org>,
        Wen Gong <wgong@codeaurora.org>, linux-kernel@vger.kernel.org,
        linux-wireless@vger.kernel.org, netdev@vger.kernel.org
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Message-Id: <20210209071818.3513DC43463@smtp.codeaurora.org>
Date:   Tue,  9 Feb 2021 07:18:18 +0000 (UTC)
Precedence: bulk

Anand K Mistry <amistry@google.com> wrote:

> ath10k_debug_fw_stats_request just be called with conf_mutex held,
> otherwise the following warning is seen when lock debugging is enabled:
> 
> WARNING: CPU: 0 PID: 793 at drivers/net/wireless/ath/ath10k/debug.c:357 ath10k_debug_fw_stats_request+0x12c/0x133 [ath10k_core]
> Modules linked in: snd_hda_codec_hdmi designware_i2s snd_hda_intel snd_intel_dspcfg snd_hda_codec i2c_piix4 snd_hwdep snd_hda_core acpi_als kfifo_buf industrialio snd_soc_max98357a snd_soc_adau7002 snd_soc_acp_da7219mx98357_mach snd_soc_da7219 acp_audio_dma ccm xt_MASQUERADE fuse ath10k_pci ath10k_core lzo_rle ath lzo_compress mac80211 zram cfg80211 r8152 mii joydev
> CPU: 0 PID: 793 Comm: wpa_supplicant Tainted: G        W         5.10.9 #5
> Hardware name: HP Grunt/Grunt, BIOS Google_Grunt.11031.104.0 09/05/2019
> RIP: 0010:ath10k_debug_fw_stats_request+0x12c/0x133 [ath10k_core]
> Code: 1e bb a1 ff ff ff 4c 89 ef 48 c7 c6 d3 31 2e c0 89 da 31 c0 e8 bd f8 ff ff 89 d8 eb 02 31 c0 5b 41 5c 41 5d 41 5e 41 5f 5d c3 <0f> 0b e9 04 ff ff ff 0f 1f 44 00 00 55 48 89 e5 41 56 53 48 89 fb
> RSP: 0018:ffffb2478099f7d0 EFLAGS: 00010246
> RAX: 0000000000000000 RBX: ffff9e432700cce0 RCX: 11c85cfd6b8e3b00
> RDX: ffff9e432700cce0 RSI: ffff9e43127c5668 RDI: ffff9e4318deddf0
> RBP: ffffb2478099f7f8 R08: 0000000000000002 R09: 00000003fd7068cc
> R10: ffffffffc01b2749 R11: ffffffffc029efaf R12: ffff9e432700c000
> R13: ffff9e43127c33e0 R14: ffffb2478099f918 R15: ffff9e43127c33e0
> FS:  00007f7ea48e2740(0000) GS:ffff9e432aa00000(0000) knlGS:0000000000000000
> CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
> CR2: 000059aa799ddf38 CR3: 0000000118de2000 CR4: 00000000001506f0
> Call Trace:
>  ath10k_sta_statistics+0x4d/0x270 [ath10k_core]
>  sta_set_sinfo+0x1be/0xaec [mac80211]
>  ieee80211_get_station+0x58/0x76 [mac80211]
>  rdev_get_station+0xf1/0x11e [cfg80211]
>  nl80211_get_station+0x7f/0x146 [cfg80211]
>  genl_rcv_msg+0x32e/0x35e
>  ? nl80211_stop_ap+0x19/0x19 [cfg80211]
>  ? nl80211_get_station+0x146/0x146 [cfg80211]
>  ? genl_rcv+0x19/0x36
>  ? genl_rcv+0x36/0x36
>  netlink_rcv_skb+0x89/0xfb
>  genl_rcv+0x28/0x36
>  netlink_unicast+0x169/0x23b
>  netlink_sendmsg+0x38a/0x402
>  sock_sendmsg+0x72/0x76
>  ____sys_sendmsg+0x153/0x1cc
>  ? copy_msghdr_from_user+0x5d/0x85
>  ___sys_sendmsg+0x7c/0xb5
>  ? lock_acquire+0x181/0x23d
>  ? syscall_trace_enter+0x15e/0x160
>  ? find_held_lock+0x3d/0xb2
>  ? syscall_trace_enter+0x15e/0x160
>  ? sched_clock_cpu+0x15/0xc6
>  __sys_sendmsg+0x62/0x9a
>  do_syscall_64+0x43/0x55
>  entry_SYSCALL_64_after_hwframe+0x44/0xa9
> 
> Fixes: 4913e675630e ("ath10k: enable rx duration report default for wmi tlv")
> Signed-off-by: Anand K Mistry <amistry@google.com>
> Signed-off-by: Kalle Valo <kvalo@codeaurora.org>

Patch applied to ath-next branch of ath.git, thanks.

7df28718928d ath10k: Fix lockdep assertion warning in ath10k_sta_statistics

-- 
https://patchwork.kernel.org/project/linux-wireless/patch/20210202144033.1.I9e556f9fb1110d58c31d04a8a1293995fb8bb678@changeid/

https://wireless.wiki.kernel.org/en/developers/documentation/submittingpatches