linux-kernel - Re: [PATCH v2 2/3] i2c: sh_mobile: Use platform_get_irq

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] [thread-next>] [day] [month] [year] [list]

Message-ID: <YcL0wWX5921wkFRt@shikoro>
Date:   Wed, 22 Dec 2021 10:49:53 +0100
From:   Wolfram Sang <wsa+renesas@...g-engineering.com>
To:     Lad Prabhakar <prabhakar.mahadev-lad.rj@...renesas.com>
Cc:     Florian Fainelli <f.fainelli@...il.com>,
        Ray Jui <rjui@...adcom.com>,
        Scott Branden <sbranden@...adcom.com>,
        bcm-kernel-feedback-list@...adcom.com,
        Nicolas Saenz Julienne <nsaenz@...nel.org>,
        Chris Brandt <chris.brandt@...esas.com>,
        linux-i2c@...r.kernel.org, linux-rpi-kernel@...ts.infradead.org,
        linux-arm-kernel@...ts.infradead.org,
        linux-renesas-soc@...r.kernel.org, linux-kernel@...r.kernel.org,
        Prabhakarprabhakar.csengg@...il.com
Subject: Re: [PATCH v2 2/3] i2c: sh_mobile: Use platform_get_irq_optional()
 to get the interrupt

On Tue, Dec 21, 2021 at 05:53:21PM +0000, Lad Prabhakar wrote:
> platform_get_resource(pdev, IORESOURCE_IRQ, ..) relies on static
> allocation of IRQ resources in DT core code, this causes an issue
> when using hierarchical interrupt domains using "interrupts" property
> in the node as this bypasses the hierarchical setup and messes up the
> irq chaining.
> 
> In preparation for removal of static setup of IRQ resource from DT core
> code use platform_get_irq_optional() for DT users only.
> 
> Signed-off-by: Lad Prabhakar <prabhakar.mahadev-lad.rj@...renesas.com>

Tested on a Renesas R-Car Gen3 SoC (M3-W) and IIC port still works and
no false positive printouts in the kernel log:

Reviewed-by: Wolfram Sang <wsa+renesas@...g-engineering.com>
Tested-by: Wolfram Sang <wsa+renesas@...g-engineering.com>


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