linux-kernel - Re: [PATCH] mtd: blktrans: use better error code for unimplemented ioctl()

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Date:	Wed, 27 May 2015 12:15:21 -0700
From:	Brian Norris <computersforpeace@...il.com>
To:	Richard Weinberger <richard@....at>
Cc:	Wenlin Kang <wenlin.kang@...driver.com>,
	"linux-mtd@...ts.infradead.org" <linux-mtd@...ts.infradead.org>,
	David Woodhouse <dwmw2@...radead.org>,
	LKML <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH] mtd: blktrans: use better error code for unimplemented
 ioctl()

On Thu, May 21, 2015 at 10:54:31AM -0700, Brian Norris wrote:
> In commit 50183936254b ("mtd: blktrans: change blktrans_getgeo return
> value") we fixed the problem that ioctl(HDIO_GETGEO) might return 0
> (success) for mtdblock devices which did not implement the feature and
> would leave a blank (zero) result.
> 
> But now, let's get the error code right. Other code paths on this ioctl
> tend to use -ENOTTY to notify the user that the ioctl() is not supported
> for the device, so let's use that instead of -EOPNOTSUPP.
> 
> Suggested-by: Richard Weinberger <richard@....at>
> Signed-off-by: Brian Norris <computersforpeace@...il.com>
> ---
> Against l2-mtd.git (linux-next)

Applied.
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