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[3.110.210.194]) by smtp.gmail.com with ESMTPSA id 5a478bee46e88-36a428af91bsm10889097eec.8.2026.10.30.17.42.19 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Fri, 30 Oct 2026 17:42:22 -0700 (PDT) From: Samarth Narang To: Krzysztof Kozlowski , Peter Griffin , Greg Kroah-Hartman , Jiri Slaby Cc: Marek Szyprowski , Alim Akhtar , linux-samsung-soc@vger.kernel.org, linux-serial@vger.kernel.org, linux-arm-kernel@lists.infradead.org, linux-kernel@vger.kernel.org, Samarth Narang Subject: [PATCH 0/2] tty: serial: samsung: RX DMA fixes in stop_rx and the RX completion Date: Sat, 31 Oct 2026 00:42:15 +0000 Message-Id: <20261031004217.3340610-1-samarth.colleges@gmail.com> X-Mailer: git-send-email 2.34.1 X-Archived-By: MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.9.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20261030_174224_441524_1BB365E0 X-CRM114-Status: GOOD ( 10.55 ) X-Spam-Score: -2.1 (--) X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.34 Precedence: list List-Id: List-Archive: List-Post: List-Help: List-Subscribe: , Sender: "linux-arm-kernel" X-Spam-Status: No, score=-10.8 required=3.0 tests=BAYES_00,DKIM_SIGNED, DKIM_VALID,DKIM_VALID_AU,DKIM_VALID_EF,FREEMAIL_FORGED_FROMDOMAIN, FREEMAIL_FROM,HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_PATCH, MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS,USER_AGENT_GIT autolearn=ham autolearn_force=no version=4.0.1 X-Spam-Checker-Version: SpamAssassin 4.0.1 (2024-03-26) on aws-us-west-2-korg-listserv-alma10-1 This series addresses two RX DMA issues previously raised under the release_dma patch [1] and subsequently confirmed by Marek Szyprowski. The first fixes s3c24xx_serial_stop_rx(), which incorrectly pauses the TX channel instead of the RX channel before reading the RX residue. The second prevents s3c24xx_serial_rx_dma_complete() from re-arming RX DMA after reception has been stopped or during shutdown, which could otherwise start a new transfer after the channel has been terminated. The series applies on top of [1] and has only been compile-tested with arm64 defconfig and W=1, with no new warnings. It has not been tested on hardware. [1] https://lore.kernel.org/r/20261030162334.3000737-1-samarth.colleges@gmail.com Samarth Narang (2): tty: serial: samsung: pause the RX DMA channel in stop_rx tty: serial: samsung: do not re-arm RX DMA once RX has been stopped drivers/tty/serial/samsung_tty.c | 8 ++++++-- 1 file changed, 6 insertions(+), 2 deletions(-) base-commit: 83f32c773255720a661aa45d83e36278135f23f5 prerequisite-patch-id: cfa1c1db9d23de3ae1cc6f0476a8ac611d09c7a8 -- 2.34.1