From: Greg KH <gregkh@linuxfoundation.org>
To: Guenter Roeck <linux@roeck-us.net>
Cc: Tudor Ambarus <tudor.ambarus@microchip.com>,
rafael@kernel.org, mturquette@baylibre.com, sboyd@kernel.org,
nsaenz@kernel.org, maxime@cerno.tech, khilman@kernel.org,
ulf.hansson@linaro.org, len.brown@intel.com, pavel@ucw.cz,
robh+dt@kernel.org, frowand.list@gmail.com, maz@kernel.org,
tglx@linutronix.de, saravanak@google.com, geert@linux-m68k.org,
nsaenzjulienne@suse.de, guillaume.tucker@collabora.com,
linux-clk@vger.kernel.org, linux-kernel@vger.kernel.org,
corbet@lwn.net, nicolas.ferre@microchip.com,
claudiu.beznea@microchip.com, linux-doc@vger.kernel.org,
linux-pm@vger.kernel.org, devicetree@vger.kernel.org,
linux-acpi@vger.kernel.org, kernel-team@android.com,
linux-rpi-kernel@lists.infradead.org,
Marek Szyprowski <m.szyprowski@samsung.com>
Subject: Re: [PATCH v2] clk: Skip clk provider registration when np is NULL
Date: Tue, 11 May 2021 09:11:03 +0200 [thread overview]
Message-ID: <YJouB/ZUOcadrokW@kroah.com> (raw)
In-Reply-To: <20210510193645.GA3920948@roeck-us.net>
On Mon, May 10, 2021 at 12:36:45PM -0700, Guenter Roeck wrote:
> On Mon, Apr 26, 2021 at 09:56:18AM +0300, Tudor Ambarus wrote:
> > commit 6579c8d97ad7 ("clk: Mark fwnodes when their clock provider is added")
> > revealed that clk/bcm/clk-raspberrypi.c driver calls
> > devm_of_clk_add_hw_provider(), with a NULL dev->of_node, which resulted in a
> > NULL pointer dereference in of_clk_add_hw_provider() when calling
> > fwnode_dev_initialized().
> >
> > Returning 0 is reducing the if conditions in driver code and is being
> > consistent with the CONFIG_OF=n inline stub that returns 0 when CONFIG_OF
> > is disabled. The downside is that drivers will maybe register clkdev lookups
> > when they don't need to and waste some memory.
> >
> > Reported-by: Marek Szyprowski <m.szyprowski@samsung.com>
> > Fixes: 6579c8d97ad7 ("clk: Mark fwnodes when their clock provider is added")
> > Fixes: 3c9ea42802a1 ("clk: Mark fwnodes when their clock provider is added/removed")
> > Signed-off-by: Tudor Ambarus <tudor.ambarus@microchip.com>
> > Reviewed-by: Stephen Boyd <sboyd@kernel.org>
>
> Tested-by: Guenter Roeck <linux@roeck-us.net>
Now applied to my tree, thanks and sorry for the delay, I thought this
was going through the clk tree.
greg k-h
next prev parent reply other threads:[~2021-05-11 7:11 UTC|newest]
Thread overview: 6+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-04-26 6:56 [PATCH v2] clk: Skip clk provider registration when np is NULL Tudor Ambarus
2021-04-26 18:17 ` Saravana Kannan
2021-04-27 14:57 ` nicolas saenz julienne
2021-05-10 19:36 ` Guenter Roeck
2021-05-11 7:11 ` Greg KH [this message]
2021-05-10 20:20 ` Nathan Chancellor
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