linux-kernel - Re: [PATCH] mailbox: tegra: Fix superfluous IRQ error message

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Date:   Mon, 14 Oct 2019 15:24:58 +0200
From:   Thierry Reding <thierry.reding@...il.com>
To:     Jon Hunter <jonathanh@...dia.com>,
        Greg Kroah-Hartman <gregkh@...uxfoundation.org>
Cc:     Jassi Brar <jassisinghbrar@...il.com>,
        linux-kernel@...r.kernel.org, linux-tegra@...r.kernel.org
Subject: Re: [PATCH] mailbox: tegra: Fix superfluous IRQ error message

On Fri, Oct 11, 2019 at 09:34:59AM +0100, Jon Hunter wrote:
> Commit 7723f4c5ecdb ("driver core: platform: Add an error message to
> platform_get_irq*()") added an error message to avoid drivers having
> to print an error message when IRQ lookup fails. However, there are
> some cases where IRQs are optional and so new optional versions of
> the platform_get_irq*() APIs have been added for these cases.
> 
> The IRQs for Tegra HSP module are optional because not all instances
> of the module have the doorbell and all of the shared interrupts.
> Hence, since the above commit was applied the following error messages
> are now seen on Tegra194 ...
> 
>  ERR KERN tegra-hsp c150000.hsp: IRQ doorbell not found
>  ERR KERN tegra-hsp c150000.hsp: IRQ shared0 not found
> 
> The Tegra HSP driver deliberately does not fail if these are not found
> and so fix the above errors by updating the Tegra HSP driver to use
> the platform_get_irq_byname_optional() API.
> 
> Signed-off-by: Jon Hunter <jonathanh@...dia.com>
> ---
>  drivers/mailbox/tegra-hsp.c | 4 ++--
>  1 file changed, 2 insertions(+), 2 deletions(-)

Perhaps Greg should pick up this patch because he's carrying the patch
that adds the platform_get_irq_byname_optional() patch for v5.5.

Greg, would you prefer a copy of this in your mailbox, or does the
following patchwork link suffice:

	http://patchwork.ozlabs.org/patch/1175012/

Either way, this patch:

Acked-by: Thierry Reding <treding@...dia.com>

Thierry

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