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X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.34 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+linux-arm-kernel=archiver.kernel.org@lists.infradead.org This patch series addresses issues and optimizations in the Xilinx AXI DMA and MCDMA drivers: 1. Fix channel idle state management in the interrupt handlers. 2. Enable transfer chaining by removing unnecessary idle restrictions. 3. Optimize control register writes and channel start logic. Note: The patches in this series were part of following IRQ coalescing series which is under discussion: https://lore.kernel.org/all/20250710101229.804183-1-suraj.gupta2@amd.com/ Changes in V3: - Patch 2: Restrict the idle-check removal to scatter-gather mode. Direct (non-SG) mode has no descriptor queue, so writing the BTT register while a transfer is in flight would corrupt the active transfer; keep those transfers serialized by retaining the idle check on the non-SG path. MCDMA always operates in scatter-gather mode and is unaffected. Update the commit description accordingly. Changes in V2: - Apply similar fixes and optimizations to MCDMA as well. - Expand the 1/3 commit description with when the described issue occurs. Suraj Gupta (3): dmaengine: xilinx_dma: Fix channel idle state management in AXIDMA and MCDMA interrupt handlers dmaengine: xilinx_dma: Enable transfer chaining for AXIDMA and MCDMA by removing idle restriction dmaengine: xilinx_dma: Optimize control register write and channel start logic for AXIDMA and MCDMA in corresponding start_transfer() drivers/dma/xilinx/xilinx_dma.c | 38 +++++++++++++++++++++------------ 1 file changed, 24 insertions(+), 14 deletions(-) -- 2.25.1