linux-kernel - Re: [PATCH] fbdev: Introduce devm_register

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Message-ID: <729c4f82-a683-4302-b4ae-f591ac04daa1@gmx.de>
Date: Fri, 30 Aug 2024 12:16:46 +0200
From: Helge Deller <deller@....de>
To: Thomas Weißschuh <linux@...ssschuh.net>,
 Daniel Vetter <daniel@...ll.ch>
Cc: linux-fbdev@...r.kernel.org, dri-devel@...ts.freedesktop.org,
 linux-kernel@...r.kernel.org, Bert Karwatzki <spasswolf@....de>,
 "Borah, Chaitanya Kumar" <chaitanya.kumar.borah@...el.com>,
 intel-gfx@...ts.freedesktop.org,
 "Kurmi, Suresh Kumar" <suresh.kumar.kurmi@...el.com>,
 "Saarinen, Jani" <jani.saarinen@...el.com>
Subject: Re: [PATCH] fbdev: Introduce devm_register_framebuffer()

On 8/30/24 11:45, Thomas Weißschuh wrote:
> Introduce a device-managed variant of register_framebuffer() which
> automatically unregisters the framebuffer on device destruction.
> This can simplify the error handling and resource management in drivers.
>
> Signed-off-by: Thomas Weißschuh <linux@...ssschuh.net>
> ---
> This is a fixed resend of [0], which was broken.
> Thanks to Bert [1], and Chaitanya Kumar [2]
> for reporting the issue.
>
> [0] https://lore.kernel.org/lkml/20240827-efifb-sysfs-v1-3-c9cc3e052180@weissschuh.net/
> [1] https://lore.kernel.org/lkml/20240829224124.2978-1-spasswolf@web.de/
> [2] https://lore.kernel.org/lkml/SJ1PR11MB612925C1C533C09F8F62F7CBB9972@SJ1PR11MB6129.namprd11.prod.outlook.com/

I've applied this patch to the fbdev git tree.
Please double check at
https://git.kernel.org/pub/scm/linux/kernel/git/deller/linux-fbdev.git/log/?h=for-next

Can you please check if this fixes this new report too:
https://marc.info/?l=linux-fbdev&m=172500784802901&w=2

> Helge, I didn't document the function devm_unregister_framebuffer() as
> it is only an internal helper and will ever only used by one user,
> similar to other helpers in fbmem.c.

Ok.

Helge