linux-stable.git/drivers/sh, branch linux-6.10.y

sh: intc: Make intc_subsys const

2024-02-15T17:12:01+00:00

Now that the driver core can properly handle constant struct bus_type,
move the make intc_subsys variable to be a constant structure as well,
placing it into read-only memory which can not be modified at runtime.

Cc: Greg Kroah-Hartman 
Suggested-by: Greg Kroah-Hartman 
Signed-off-by: Ricardo B. Marliere 
Reviewed-by: Greg Kroah-Hartman 
Reviewed-by: John Paul Adrian Glaubitz 
Link: https://lore.kernel.org/r/20240208-bus_cleanup-sh2-v1-1-729277400893@marliere.net
Signed-off-by: John Paul Adrian Glaubitz

maple: make maple_bus_type static and const

2024-01-04T13:37:17+00:00

There is no need to export maple_bus_type as no one uses it outside of
maple.c, so make it static, AND make it const as it can be read-only as
no one modifies it.

Cc: Yoshinori Sato 
Cc: Rich Felker 
Cc: John Paul Adrian Glaubitz 
Cc: 
Link: https://lore.kernel.org/r/2023121918-rejoicing-frostlike-d976@gregkh
Signed-off-by: Greg Kroah-Hartman

sh: Remove superhyway bus support

2023-10-25T14:50:11+00:00

The superhyway bus driver was only referenced on SH4-202, which is now gone,
so remove it all as well.

I could find no trace of anything ever calling superhyway_register_driver(),
not in the git history but also not on the web, so I assume this has never
served any purpose on mainline kernels.

Signed-off-by: Arnd Bergmann 
Reviewed-by: John Paul Adrian Glaubitz 
Link: https://lore.kernel.org/r/20230914155523.3839811-3-arnd@kernel.org
Signed-off-by: John Paul Adrian Glaubitz

sh: intc: move to use bus_get_dev_root()

2023-03-17T14:29:55+00:00

Direct access to the struct bus_type dev_root pointer is going away soon
so replace that with a call to bus_get_dev_root() instead, which is what
it is there for.

Cc: Yoshinori Sato 
Cc: Rich Felker 
Cc: linux-sh@vger.kernel.org
Acked-by: John Paul Adrian Glaubitz 
Link: https://lore.kernel.org/r/20230313182918.1312597-17-gregkh@linuxfoundation.org
Signed-off-by: Greg Kroah-Hartman

Merge tag 'sh-for-v6.3-tag1' of git://git.kernel.org/pub/scm/linux/kernel/git/glaubitz/sh-linux

2023-03-01T17:44:22+00:00

Pull sh updates from John Paul Adrian Glaubitz:

 - regression fix in connection with the rtl8169 driver on SuperH boards
   that was introduced when the driver was switched to use
   devm_clk_get_optional_enabled() to simplify the code (Geert
   Uytterhoeven)

 - build warning fix to allow the kernel to be built with CONFIG_WERROR
   enabled (Michael Karcher)

* tag 'sh-for-v6.3-tag1' of git://git.kernel.org/pub/scm/linux/kernel/git/glaubitz/sh-linux:
  sh: clk: Fix clk_enable() to return 0 on NULL clk
  sh: intc: Avoid spurious sizeof-pointer-div warning

sh: clk: Fix clk_enable() to return 0 on NULL clk

2023-02-27T09:50:48+00:00

On SH, devm_clk_get_optional_enabled() fails with -EINVAL if the clock
is not found.  This happens because __devm_clk_get() assumes it can pass
a NULL clock pointer (as returned by clk_get_optional()) to the init()
function (clk_prepare_enable() in this case), while the SH
implementation of clk_enable() considers that an error.

Fix this by making the SH clk_enable() implementation return zero
instead, like the Common Clock Framework does.

Reported-by: John Paul Adrian Glaubitz 
Signed-off-by: Geert Uytterhoeven 
Tested-by: John Paul Adrian Glaubitz 
Acked-by: Stephen Boyd 
Link: https://lore.kernel.org/r/b53e6b557b4240579933b3359dda335ff94ed5af.1675354849.git.geert+renesas@glider.be
Signed-off-by: John Paul Adrian Glaubitz

maple: remove unneeded maple_bus_uevent() callback.

2023-02-01T13:01:32+00:00

The driver core recently changed the uevent bus callback to take a const
pointer, and the maple_bus_uevent() was not correctly fixed up.  Instead
of fixing the function parameter types, just remove the callback
entirely as it does not do anything, so it is not necessary.

Cc: Yoshinori Sato 
Cc: Rich Felker 
Cc: Hans de Goede 
Cc: "Rafael J. Wysocki" 
Reported-by: Linux Kernel Functional Testing 
Reported-by: Naresh Kamboju 
Fixes: 2a81ada32f0e ("driver core: make struct bus_type.uevent() take a const *")
Link: https://lore.kernel.org/r/20230201125642.624255-1-gregkh@linuxfoundation.org
Signed-off-by: Greg Kroah-Hartman

genirq: Add and use an irq_data_update_affinity helper

2022-07-07T08:38:04+00:00

Some architectures and irqchip drivers modify the cpumask returned by
irq_data_get_affinity_mask, usually by copying in to it. This is
problematic for uniprocessor configurations, where the affinity mask
should be constant, as it is known at compile time.

Add and use a setter for the affinity mask, following the pattern of
irq_data_update_effective_affinity. This allows the getter function to
return a const cpumask pointer.

Signed-off-by: Samuel Holland 
Reviewed-by: Oleksandr Tyshchenko  # Xen bits
Signed-off-by: Marc Zyngier 
Link: https://lore.kernel.org/r/20220701200056.46555-7-samuel@sholland.org

maple: fix wrong return value of maple_bus_init().

2021-09-17T18:00:09+00:00

If KMEM_CACHE or maple_alloc_dev failed, the maple_bus_init() will return 0
rather than error, because the retval is not changed after KMEM_CACHE or
maple_alloc_dev failed.

Fixes: 17be2d2b1c33 ("sh: Add maple bus support for the SEGA Dreamcast.")
Reported-by: Hulk Robot 
Signed-off-by: Lu Wei 
Acked-by: John Paul Adrian Glaubitz 
Signed-off-by: Rich Felker

sh: superhyway: Simplify check in remove callback

2021-08-05T12:37:03+00:00

The driver core only calls a remove callback when the device was
successfully bound (aka probed) before. So dev->driver is never NULL.

(And even if it was NULL, to_superhyway_driver(NULL) isn't ...)

Signed-off-by: Uwe Kleine-König 
Link: https://lore.kernel.org/r/20210730191035.1455248-3-u.kleine-koenig@pengutronix.de
Signed-off-by: Greg Kroah-Hartman