From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from smtp.kernel.org (aws-us-west-2-korg-mail-1.web.codeaurora.org [10.30.226.201]) (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 12FBD218EB1; Mon, 27 Oct 2025 18:39:46 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=10.30.226.201 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1761590386; cv=none; b=AVoM8CO7AaDfbgt8caB2BzJ0w+991njcnDbk4mPmRhJ6TsFPBQ4AeLugMjkCDWo9Qefg2ZTAU7aODCG9xPBFOyoWwet13Go7KaBDtXM1E4poaG8JrTqlLRq3qAzLHSnmAWTI0DvZw/NqwlHVVGzMfughgkMRRihg60b+4NqLFNs= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1761590386; c=relaxed/simple; bh=uYUBxInjEvs8zC5D+nm2QIO2quYjbJunDRpDRRtSY0Q=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=uWoO4YkD3PchiGEXYJzh38p7LSl8rS5CIGzKm7HpQmOf55fZZX/2HrOUs5m2cLRZwZI7tQwNx4DYfIFArd1LfQqT5I6tyLye2cKqgdrPPkl8i76eO9ib1/Aj+0c1YXAG5pA/R4G8xCooUeK6+KKKi2mPdor6dFcEs6U1EVhAa90= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=linuxfoundation.org header.i=@linuxfoundation.org header.b=Al3V/XvN; arc=none smtp.client-ip=10.30.226.201 Authentication-Results: smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=linuxfoundation.org header.i=@linuxfoundation.org header.b="Al3V/XvN" Received: by smtp.kernel.org (Postfix) with ESMTPSA id 9BF30C4CEF1; Mon, 27 Oct 2025 18:39:45 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=linuxfoundation.org; s=korg; t=1761590386; bh=uYUBxInjEvs8zC5D+nm2QIO2quYjbJunDRpDRRtSY0Q=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=Al3V/XvNraDRDME9wYNvHk4n3gyCPhgJXQs0NjOLzKrnfMLgvpskRly2jBtnOahOV b8sp4GFKk1K1ckiquUlVsE+gpmty2M8KQT4SS9BHrTdKmhsYnDakYbGta3ia3lqnEi hzAemDg1DHZ7b7uGPXAx/PlZWb3XJCfs3pZiaiic= From: Greg Kroah-Hartman To: stable@vger.kernel.org Cc: Greg Kroah-Hartman , patches@lists.linux.dev, Qianfeng Rong , John Garry , Bart Van Assche , Jens Axboe , Sasha Levin Subject: [PATCH 5.4 025/224] block: use int to store blk_stack_limits() return value Date: Mon, 27 Oct 2025 19:32:51 +0100 Message-ID: <20251027183509.679051278@linuxfoundation.org> X-Mailer: git-send-email 2.51.1 In-Reply-To: <20251027183508.963233542@linuxfoundation.org> References: <20251027183508.963233542@linuxfoundation.org> User-Agent: quilt/0.69 X-stable: review X-Patchwork-Hint: ignore Precedence: bulk X-Mailing-List: patches@lists.linux.dev List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: 8bit 5.4-stable review patch. If anyone has any objections, please let me know. ------------------ From: Qianfeng Rong [ Upstream commit b0b4518c992eb5f316c6e40ff186cbb7a5009518 ] Change the 'ret' variable in blk_stack_limits() from unsigned int to int, as it needs to store negative value -1. Storing the negative error codes in unsigned type, or performing equality comparisons (e.g., ret == -1), doesn't cause an issue at runtime [1] but can be confusing. Additionally, assigning negative error codes to unsigned type may trigger a GCC warning when the -Wsign-conversion flag is enabled. No effect on runtime. Link: https://lore.kernel.org/all/x3wogjf6vgpkisdhg3abzrx7v7zktmdnfmqeih5kosszmagqfs@oh3qxrgzkikf/ #1 Signed-off-by: Qianfeng Rong Reviewed-by: John Garry Fixes: fe0b393f2c0a ("block: Correct handling of bottom device misaligment") Reviewed-by: Bart Van Assche Link: https://lore.kernel.org/r/20250902130930.68317-1-rongqianfeng@vivo.com Signed-off-by: Jens Axboe Signed-off-by: Sasha Levin --- block/blk-settings.c | 3 ++- 1 file changed, 2 insertions(+), 1 deletion(-) diff --git a/block/blk-settings.c b/block/blk-settings.c index 13be635300a85..d4870441a38ac 100644 --- a/block/blk-settings.c +++ b/block/blk-settings.c @@ -505,7 +505,8 @@ static unsigned int blk_round_down_sectors(unsigned int sectors, unsigned int lb int blk_stack_limits(struct queue_limits *t, struct queue_limits *b, sector_t start) { - unsigned int top, bottom, alignment, ret = 0; + unsigned int top, bottom, alignment; + int ret = 0; t->max_sectors = min_not_zero(t->max_sectors, b->max_sectors); t->max_hw_sectors = min_not_zero(t->max_hw_sectors, b->max_hw_sectors); -- 2.51.0