From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from smtp.kernel.org (aws-us-west-2-korg-mail-alma10-1.taild15c8.ts.net [100.103.45.18]) (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 359D33FD139; Tue, 25 Aug 2026 11:49:49 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=100.103.45.18 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1787658593; cv=none; b=UtUZRtcQWWOCMYDI+mY+XhZMRIg0XRZxjFkbavsSb9R854slBK0wFXdcTUaX+VAjyk+lMXw2gU48esMagaocI+cp240ryWpQX9BulzmY06/f/1UQIT4z+ukIPxA+X1Sq3la/jpwPcUmX8/R9m5dMSrUQ9322mAwYRLhQEJ9mAIk= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1787658593; c=relaxed/simple; bh=7HsK/q4hdd5iyl6NAyoOJKhkw1wlJiWWUjnmuaw9sQ4=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=oeRbeH3sw90s9+xntB5QnEawC9O35fqd70NlF6ws58THQwjFN90U7gtgMghov/Eev3JTbvqascOpUFhhCnUKEfbCcEgCjnuHvoVuAr2OwktgqxLT2DWaswm6KFCyWwLHubEdaBqoUKAf1S0yjLuIgOM8kAeLo4gQk9AQlKVSt3o= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b=OsJRqSNO; arc=none smtp.client-ip=100.103.45.18 Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b="OsJRqSNO" Received: by smtp.kernel.org (Postfix) with ESMTPSA id C956B1F00AC4; Tue, 25 Aug 2026 11:49:47 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=kernel.org; s=k20260515; t=1787658589; bh=I8aAnpC+U2U4v4kj2zSuG8wXI0uZsk9I36mmsIH0Apc=; h=From:To:Cc:Subject:Date:In-Reply-To:References; b=OsJRqSNOWC/g01jeLPauOGWu+TMXfIKOH0mwfvb/kn7zJedG0+1cM1NbzOeW2QYHq T9MJNw+vkz8vEYdjA8kAKg5flhaWyl1M9nyCdnCryUudwKyfBesrPejSlfbPHrrerF 54sgE+QjRDzb9kSCveyDB6mAMakmGYGeLbOEHVF7ejP63e2u/0so4RvwMG+A1eCleF 0n4YzjbkE/PFKPGZLgb7bD8t+wZ/VbsVOYrZzFr3B9HCGUZ4nf4YMdCAVaH8C3lv2w SWgOgL0I9pHPWzXVjzmG4mMiiuNX6ILiqu5iRO3hrOb1B9UVxzjbjrnpDIQYbJDgXX qQdcgXKRmSF9g== From: Sasha Levin To: Vincent Jardin Cc: Sasha Levin , Oleksij Rempel , Pengutronix Kernel Team , Andi Shyti , Frank Li , Sascha Hauer , Fabio Estevam , Wolfram Sang , Kaushal Butala , Shawn Guo , Stefan Eichenberger , linux-i2c@vger.kernel.org, imx@lists.linux.dev, linux-arm-kernel@lists.infradead.org, linux-kernel@vger.kernel.org, stable@vger.kernel.org, Carlos Song , Stefan Eichenberger , Dominique Martinet Subject: Re: [PATCH v3 0/2] i2c: imx: fix SMBus block-read of 0 locking the bus [stable backport question/offer] Date: Tue, 25 Aug 2026 07:49:30 -0400 Message-ID: <202608250009.7e963743cf842d4e@kernel.org> X-Mailer: git-send-email 2.53.0 In-Reply-To: References: Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: 8bit Dominique Martinet wrote on Fri, Aug 21, 2026 at 06:07:35PM +0900: > tl;dr: If maintainers agree, I can send these two for a future 6.6/6.12: > 5f5c2d4579ca ("i2c: imx: prevent rescheduling in non dma mode") > 07fd9385f0d8 ("i2c: imx: fix locked bus on SMBus block-read of 0 (IRQ)") Thanks for the offer, but let's not take these on 6.6/6.12. 5f5c2d4579ca splits the read path, and the split leaves the block_err handling in the atomic variant only, while the live non-dma path ends up back in the unfixed handler. On 6.6/6.12 the block-read-of-0 fix that shipped in 6.12.101 and its 6.6 sibling landed in the shared i2c_imx_read(), which both paths still go through - so pulling the rework in would actually re-open the bus lockup those trees are already protected against. 07fd9385f0d8 on its own buys nothing there either: it patches i2c_imx_isr_read_block_data_len(), which only exists once 5f5c2d4579ca is applied. Your premise is right that b460b15b3cc2 is now everywhere, but 5f5c2d4579ca also carries five Fixes: follow-ups, four of them tagged Cc: stable # v6.13+, none of which are on 6.6/6.12 - so doing it properly means backporting a six-commit ISR state-machine rework into two frozen trees, and upstream was still fixing that rework in February. -- Thanks, Sasha