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X-BeenThere: linux-i3c@lists.infradead.org X-Mailman-Version: 2.1.34 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Sender: "linux-i3c" Errors-To: linux-i3c-bounces+linux-i3c=archiver.kernel.org@lists.infradead.org On Tue, Mar 31, 2026 at 08:12:23PM +0800, Billy Tsai wrote: > The RING_OPERATION1 register contains multiple bitfields (enqueue, > software dequeue, and IBI dequeue pointers) that are updated from > different contexts. Because these updates are performed via > read-modify-write sequences, concurrent access from process and IRQ > contexts can lead to lost updates. > > Example: > CPU 0 (hci_dma_queue_xfer): reads RING_OPERATION1 (enq=5, deq=2) > CPU 1 (hci_dma_xfer_done): reads RING_OPERATION1 (enq=5, deq=2) Add Adrian Hunter , who add lock at equeue. https://lore.kernel.org/linux-i3c/20260306072451.11131-6-adrian.hunter@intel.com/ Dose above patch fix your problem ? Frank -- linux-i3c mailing list linux-i3c@lists.infradead.org http://lists.infradead.org/mailman/listinfo/linux-i3c