From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from perceval.ideasonboard.com (perceval.ideasonboard.com [213.167.242.64]) (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 178A21917F6; Mon, 28 Oct 2024 08:28:13 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=213.167.242.64 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1730104096; cv=none; b=d3uOTW0HyORIi+83WzeV2jL4ytT3FQQwqG6yeBU8qEmneHnCWeMsMzmy5iv5zNG6XHnE9lFmt5ISJuoBIDJIho3HJdVGo+Pmy8OFHe218kRVfkNEOw5ROab5Dt3MOspXfHWjQeH5Zj77KpXgr1YJq8fYOBqmk8l2Ywh6Us4K5co= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1730104096; c=relaxed/simple; bh=81mWiUdsA2MAHHKPZ89jMOhSc9q47y3FOIO6Pr6V9uQ=; h=Message-ID:Date:MIME-Version:Subject:To:Cc:References:From: In-Reply-To:Content-Type; b=YysvWdsazB8bIFKQw2LEytRLDSVmEryCyaq97bVQY9KNpZtq8PwpXFu9+EugS62CLEIXG4QS4/2WjKOU7i2DR8guCV65NMGi5sYQ3k9W9/C9Rxe8vg8dg4f6O2z3O0Klw4mgvKHemqc4+zsm0yzndlcWx9ccbDixt749dX1f1Ig= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dmarc=none (p=none dis=none) header.from=ideasonboard.com; spf=pass smtp.mailfrom=ideasonboard.com; dkim=pass (1024-bit key) header.d=ideasonboard.com header.i=@ideasonboard.com header.b=fylOE24c; arc=none smtp.client-ip=213.167.242.64 Authentication-Results: smtp.subspace.kernel.org; dmarc=none (p=none dis=none) header.from=ideasonboard.com Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=ideasonboard.com Authentication-Results: smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=ideasonboard.com header.i=@ideasonboard.com header.b="fylOE24c" Received: from [192.168.88.20] (91-157-155-49.elisa-laajakaista.fi [91.157.155.49]) by perceval.ideasonboard.com (Postfix) with ESMTPSA id DFCD1594; Mon, 28 Oct 2024 09:28:07 +0100 (CET) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=ideasonboard.com; s=mail; t=1730104088; bh=81mWiUdsA2MAHHKPZ89jMOhSc9q47y3FOIO6Pr6V9uQ=; h=Date:Subject:To:Cc:References:From:In-Reply-To:From; b=fylOE24cfShWR6CFrHxYAOyoj/QBe1psQyg9SgkWeuDf7o36ABwyRNYlZ/nUeAbzv yoj+bfp6Od7TbJKfxzkh4m6FWxPywCtOv9x1ApbVa/XqPV4dhvKdt2Ej5rGn/Dtl5y ogKcRw5x11/xmiFBWslr7an1zZz2luJRh/RHZ44g= Message-ID: <3ecf364c-8bb1-4f96-817e-fd36a2c29c84@ideasonboard.com> Date: Mon, 28 Oct 2024 10:28:06 +0200 Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 User-Agent: Mozilla Thunderbird Subject: Re: [PATCH][next] drm/omap: clean up error exit path on omap_encoder allocation failure To: Colin Ian King Cc: kernel-janitors@vger.kernel.org, linux-kernel@vger.kernel.org, Maarten Lankhorst , Maxime Ripard , Thomas Zimmermann , David Airlie , Simona Vetter , dri-devel@lists.freedesktop.org References: <20241015141012.155559-1-colin.i.king@gmail.com> Content-Language: en-US From: Tomi Valkeinen Autocrypt: addr=tomi.valkeinen@ideasonboard.com; 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charset=UTF-8; format=flowed Content-Transfer-Encoding: 7bit Hi, On 15/10/2024 17:10, Colin Ian King wrote: > Currently when an allocation failure occurs for omap_encoder the exit > path will destroy encoder via omap_encoder_destroy if it is not null. > However, encoder is always null at this point, so the check and destroy > is redundant and can be removed. Clean up the code by removing the exit > path and redundant omap_encoder_destroy call, and just return NULL. > > Signed-off-by: Colin Ian King > --- > drivers/gpu/drm/omapdrm/omap_encoder.c | 8 +------- > 1 file changed, 1 insertion(+), 7 deletions(-) This is correct, but I think it would make sense to fix the error handling in omap_encoder_init() fully, instead of just partially: drm_encoder_init() can return an error, in which case we should free the omap_encoder. Could you update the patch to do that too? Tomi > diff --git a/drivers/gpu/drm/omapdrm/omap_encoder.c b/drivers/gpu/drm/omapdrm/omap_encoder.c > index 4dd05bc732da..a99022638a2c 100644 > --- a/drivers/gpu/drm/omapdrm/omap_encoder.c > +++ b/drivers/gpu/drm/omapdrm/omap_encoder.c > @@ -126,21 +126,15 @@ struct drm_encoder *omap_encoder_init(struct drm_device *dev, > > omap_encoder = kzalloc(sizeof(*omap_encoder), GFP_KERNEL); > if (!omap_encoder) > - goto fail; > + return NULL; > > omap_encoder->output = output; > > encoder = &omap_encoder->base; > > drm_encoder_init(dev, encoder, &omap_encoder_funcs, > DRM_MODE_ENCODER_TMDS, NULL); > drm_encoder_helper_add(encoder, &omap_encoder_helper_funcs); > > return encoder; > - > -fail: > - if (encoder) > - omap_encoder_destroy(encoder); > - > - return NULL; > }