linux-kernel - Re: [PATCH] omap-iommu: no need to check return value of debugfs

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Date:   Thu, 4 Jul 2019 17:35:52 +0200
From:   Joerg Roedel <joro@...tes.org>
To:     Greg Kroah-Hartman <gregkh@...uxfoundation.org>
Cc:     iommu@...ts.linux-foundation.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH] omap-iommu: no need to check return value of
 debugfs_create functions

On Thu, Jul 04, 2019 at 04:36:49PM +0200, Greg Kroah-Hartman wrote:
> When calling debugfs functions, there is no need to ever check the
> return value.  The function can work or not, but the code logic should
> never do something different based on this.
> 
> Cc: Joerg Roedel <joro@...tes.org>
> Cc: iommu@...ts.linux-foundation.org
> Signed-off-by: Greg Kroah-Hartman <gregkh@...uxfoundation.org>
> ---
> Warning, not even test-built, but "should" work :)

It almost did :)

> +	debugfs_create_file("regs", 0400, d, obj, &attrregs_fops);
> +	debugfs_create_file("tlb", 0400, d, obj, &attrtlb_fops);
> +	debugfs_create_file("pagetable", 0400, d, obj, &attrpagetable_fops);

The _fops were named without the 'attr' prefix, changed that and it
compiled. Patch is now applied.

Thanks,

	Joerg