From: Kalle Valo <kvalo@codeaurora.org>
To: Hans de Goede <hdegoede@redhat.com>
Cc: Arend van Spriel <aspriel@gmail.com>,
Franky Lin <franky.lin@broadcom.com>,
Hante Meuleman <hante.meuleman@broadcom.com>,
Chi-Hsien Lin <chi-hsien.lin@infineon.com>,
Chung-hsien Hsu <chung-hsien.hsu@infineon.com>,
Hans de Goede <hdegoede@redhat.com>,
Johannes Berg <johannes.berg@intel.com>,
linux-wireless@vger.kernel.org,
brcm80211-dev-list.pdl@broadcom.com
Subject: Re: [PATCH 5.12 regression fix resend 1/1] brcmfmac: p2p: Fix recently introduced deadlock issue
Date: Tue, 6 Apr 2021 10:17:05 +0000 (UTC) [thread overview]
Message-ID: <20210406101705.28C72C43461@smtp.codeaurora.org> (raw)
In-Reply-To: <20210405205429.19304-2-hdegoede@redhat.com>
Hans de Goede <hdegoede@redhat.com> wrote:
> Commit a05829a7222e ("cfg80211: avoid holding the RTNL when calling the
> driver") replaced the rtnl_lock parameter passed to various brcmf
> functions with just lock, because since that commit it is not just
> about the rtnl_lock but also about the wiphy_lock .
>
> During this search/replace the "if (!rtnl_locked)" check in brcmfmac/p2p.c
> was accidentally replaced with "if (locked)", dropping the inversion of
> the check. This causes the code to now call rtnl_lock() while already
> holding the lock, causing a deadlock.
>
> Add back the "!" to the if-condition to fix this.
>
> Cc: Johannes Berg <johannes.berg@intel.com>
> Fixes: a05829a7222e ("cfg80211: avoid holding the RTNL when calling the driver")
> Signed-off-by: Hans de Goede <hdegoede@redhat.com>
This is already applied:
https://git.kernel.org/pub/scm/linux/kernel/git/kvalo/wireless-drivers.git/commit/?id=bd83a2fc05ed323d7ae38443a6d2e253ef1c4237
Patch set to Superseded.
--
https://patchwork.kernel.org/project/linux-wireless/patch/20210405205429.19304-2-hdegoede@redhat.com/
https://wireless.wiki.kernel.org/en/developers/documentation/submittingpatches
next prev parent reply other threads:[~2021-04-06 10:17 UTC|newest]
Thread overview: 5+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-04-05 20:54 [PATCH 5.12 regression fix resend 0/1] brcmfmac: p2p: Fix recently introduced deadlock issue Hans de Goede
2021-04-05 20:54 ` [PATCH 5.12 regression fix resend 1/1] " Hans de Goede
2021-04-06 10:17 ` Kalle Valo [this message]
[not found] ` <20210406101705.38F85C43463@smtp.codeaurora.org>
2021-04-06 10:29 ` Hans de Goede
2021-04-06 10:24 ` [PATCH 5.12 regression fix resend 0/1] " Kalle Valo
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