From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from lamorak.hansenpartnership.com (lamorak.hansenpartnership.com [198.37.111.173]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id B5490229B18 for ; Wed, 7 Jan 2026 12:36:49 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=198.37.111.173 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1767789411; cv=none; b=VnnPige3WwygQzvfK3kOV4IJVXZISmEM7BWa+u3z+6W302mzrlEg306NmUn1FN+iYpECsbU5VOcQKfc/jO+wW4/60SqHsYKn7iZ64vFg8xk5rcxfXlwxM4VV3qqoSTAmCBJNxp4SARcaXJ9FmeNsxKP1FKtoiugPZL6cf2qru5E= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1767789411; c=relaxed/simple; bh=vzA3PpKXskqdZhNhgvq0MoYJ9KkiPOvjG0+k0ShcBRQ=; h=Message-ID:Subject:From:To:Cc:Date:In-Reply-To:References: Content-Type:MIME-Version; b=mHgpA2SBANGuSKuV5tqj51gNwfMaKwSYOwIQY0I/48TY9+rURqa7tFNseoY2NrUxeK8D0KEIZJnSXX+zKUECXyyY4wb0+s7YA6GnJTxgv6ZY8Z33OZCvI11GMtgTaPeGVoFOBJX5ZEqaxuvFv1Q1oWlKLfNDA1vJCpMOcSfuGIQ= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dmarc=pass (p=quarantine dis=none) header.from=HansenPartnership.com; spf=pass smtp.mailfrom=HansenPartnership.com; dkim=pass (1024-bit key) header.d=hansenpartnership.com header.i=@hansenpartnership.com header.b=AkoDOYTu; arc=none smtp.client-ip=198.37.111.173 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=quarantine dis=none) header.from=HansenPartnership.com Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=HansenPartnership.com Authentication-Results: smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=hansenpartnership.com header.i=@hansenpartnership.com header.b="AkoDOYTu" DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=hansenpartnership.com; s=20151216; t=1767789407; bh=vzA3PpKXskqdZhNhgvq0MoYJ9KkiPOvjG0+k0ShcBRQ=; h=Message-ID:Subject:From:To:Date:In-Reply-To:References:From; b=AkoDOYTuZAoSxCu+HVFjFs9TW15Y+uldl2a/gAlWYoduuYSEewnEz1o2FDf6dCT1i 9DU8bqzPETRjc9AELKbtzbX8eIC+2e6K8GYFhzW/sNl+4vI+p9L8WiFbCQyTkEa9nC yxgmdttwAiN1as3xf+XUfvvPPbYhCrL0yzItpiiM= Received: from lingrow.int.hansenpartnership.com (unknown [IPv6:2601:5c4:4300:d341::a774]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange x25519 server-signature RSA-PSS (2048 bits) server-digest SHA256) (No client certificate requested) by lamorak.hansenpartnership.com (Postfix) with ESMTPSA id 8EF5A1C035D; Wed, 07 Jan 2026 07:36:45 -0500 (EST) Message-ID: Subject: Re: [PATCH] scsi: Change the return type of the .queuecommand() callback From: James Bottomley To: Bart Van Assche , "Martin K . Petersen" Cc: linux-scsi@vger.kernel.org, Damien Le Moal , John Garry , Jonathan Corbet , Niklas Cassel , Takashi Sakamoto , Jason Gunthorpe , Leon Romanovsky , Sathya Prakash , Sreekanth Reddy , Suganath Prabu Subramani , Nihar Panda , Heiko Carstens , Vasily Gorbik , Alexander Gordeev , Khalid Aziz , Finn Thain , Michael Schmitz , Adaptec OEM Raid Solutions , Russell King , Anil Gurumurthy , Sudarsana Kalluru , Saurav Kashyap , Javed Hasan , GR-QLogic-Storage-Upstream@marvell.com, Satish Kharat , Sesidhar Baddela , Karan Tilak Kumar , Don Brace , Tyrel Datwyler , Madhavan Srinivasan , Michael Ellerman , Brian King , Hannes Reinecke , Lee Duncan , Chris Leech , Mike Christie , Justin Tee , Paul Ely , Kashyap Desai , Sumit Saxena , Shivasharan S , Chandrakanth patil , GOTO Masanori , Nilesh Javali , Manish Rangankar , "K. Y. Srinivasan" , Haiyang Zhang , Wei Liu , Dexuan Cui , Long Li , "Michael S. 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Nguyen" Date: Wed, 07 Jan 2026 07:36:44 -0500 In-Reply-To: <20260106185310.2524290-1-bvanassche@acm.org> References: <20260106185310.2524290-1-bvanassche@acm.org> Autocrypt: addr=James.Bottomley@HansenPartnership.com; prefer-encrypt=mutual; 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 8mT2Eh9SkH+YVOmaKsajgZgrBxA7fWmGoxXswEVxJIFj3vW7yNc0C5HaUdYa5iGOMs4kg2ht4s7yy7NRQuh7BifWjo6BQ6k4S1H+6axZucxhSV1L6zN9d+lr3Xo/vy1unzA== Content-Type: text/plain; charset="UTF-8" Content-Transfer-Encoding: quoted-printable User-Agent: Evolution 3.50.3 Precedence: bulk X-Mailing-List: linux-scsi@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 On Tue, 2026-01-06 at 11:52 -0700, Bart Van Assche wrote: > Let the compiler verify whether a valid value is returned by the > .queuecommand() implementations by changing their return type from > 'int' into 'enum scsi_qc_status'. What makes you think the C compiler checks enum values? Traditionally the opposite has been true: enum is just a fancy #define, which is how we use it in a lot of the kernel code. Even if the compiler people came up with a switch to turn on this behaviour, we'd likely have trouble turning it on without eliminating all the fancy #define use. Regards, James