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Fri, 13 Nov 2026 03:05:18 -0800 (PST) Received: from deb05.proceq.com ([213.160.61.66]) by smtp.gmail.com with ESMTPSA id ffacd0b85a97d-49c605e4a2asm4788105f8f.39.2026.11.13.03.05.17 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Fri, 13 Nov 2026 03:05:17 -0800 (PST) From: Mehmet Fide To: Andi Shyti , Oleksij Rempel Cc: Pengutronix Kernel Team , Frank Li , Sascha Hauer , Fabio Estevam , Yao Yuan , Wolfram Sang , linux-i2c@vger.kernel.org, imx@lists.linux.dev, linux-arm-kernel@lists.infradead.org, linux-kernel@vger.kernel.org, stable@vger.kernel.org Subject: Re: [PATCH 2/2] i2c: imx: return -ENXIO at once when a DMA write is not acknowledged Date: Fri, 13 Nov 2026 12:05:16 +0100 Message-ID: <20261113110517.1142293-1-mehmet.fide@gmail.com> X-Mailer: git-send-email 2.56.0 In-Reply-To: <20261113073250.1037215-3-mehmet.fide@gmail.com> References: X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Post: List-Help: List-Subscribe: List-Unsubscribe: List-Owner: Precedence: list MIME-Version: 1.0 Content-Transfer-Encoding: 8bit Please do not apply this patch as it is. Sashiko is right on both points: the new -ENXIO path leaves the DMA buffer mapped, as the timeout path does today, and a NACK of the last byte the DMA writes can be missed. v2 fixes both. Patch 1/2 is not affected. The block_data remark on patch 1/2 is a separate bug; I have sent a patch for it on its own.