lists.openwall.net   lists  /  announce  owl-users  owl-dev  john-users  john-dev  passwdqc-users  yescrypt  popa3d-users  /  oss-security  kernel-hardening  musl  sabotage  tlsify  passwords  /  crypt-dev  xvendor  /  Bugtraq  Full-Disclosure  linux-kernel  linux-netdev  linux-ext4  linux-hardening  linux-cve-announce  PHC 
Open Source and information security mailing list archives
 
Hash Suite: Windows password security audit tool. GUI, reports in PDF.
[<prev] [next>] [<thread-prev] [day] [month] [year] [list]
Message-ID: <20180312094434.uucwvqy6pykxpbl7@flea>
Date:   Mon, 12 Mar 2018 10:44:34 +0100
From:   Maxime Ripard <maxime.ripard@...tlin.com>
To:     megous@...ous.com
Cc:     dev@...ux-sunxi.org, Jernej Skrabec <jernej.skrabec@...l.net>,
        David Airlie <airlied@...ux.ie>, Chen-Yu Tsai <wens@...e.org>,
        "open list:DRM DRIVERS FOR ALLWINNER A10" 
        <dri-devel@...ts.freedesktop.org>,
        "moderated list:ARM/Allwinner sunXi SoC support" 
        <linux-arm-kernel@...ts.infradead.org>,
        open list <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH] drm/sun4i: Fix exclusivity of the TCON clocks

On Sat, Mar 10, 2018 at 12:05:11PM +0100, megous@...ous.com wrote:
> From: Ondrej Jirman <megous@...ous.com>
> 
> Currently the exclusivity is enabled when the rate is set by
> the mode setting functions. These functions are called by
> mode_set_nofb callback of drm_crc_helper. Then exclusivity
> is disabled when tcon is disabled by atomic_disable
> callback.
> 
> What happens is that mode_set_nofb can be called once when
> mode chnages, and afterwards the system can call atomic_enable
> and atomic_disable multiple times without further calls to
> mode_set_nofb.
> 
> This happens:
> 
> mode_set_nofb   - clk exclusivity is enabled
> atomic_enable
> atomic_disable  - clk exclusivity is disabled
> atomic_enable
> atomic_disable  - clk exclusivity is already disabled, leading to WARN
>                   in clk_rate_exclusive_put
> 
> Solution is to enable exclusivity in sun4i_tcon_channel_set_status.
> 
> Signed-off-by: Ondrej Jirman <megous@...ous.com>
> Cc: Jernej Skrabec <jernej.skrabec@...l.net>

Applied, thanks!
Maxime

-- 
Maxime Ripard, Bootlin (formerly Free Electrons)
Embedded Linux and Kernel engineering
https://bootlin.com

Download attachment "signature.asc" of type "application/pgp-signature" (834 bytes)

Powered by blists - more mailing lists

Powered by Openwall GNU/*/Linux Powered by OpenVZ