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Adrian Hunter 003df94bcc i3c: mipi-i3c-hci: Correct RING_CTRL_ABORT handling in DMA dequeue ... commit b795e68bf3 upstream. The logic used to abort the DMA ring contains several flaws: 1. The driver unconditionally issues a ring abort even when the ring has already stopped. 2. The completion used to wait for abort completion is never re-initialized, resulting in incorrect wait behavior. 3. The abort sequence unintentionally clears RING_CTRL_ENABLE, which resets hardware ring pointers and disrupts the controller state. 4. If the ring is already stopped, the abort operation should be considered successful without attempting further action. Fix the abort handling by checking whether the ring is running before issuing an abort, re-initializing the completion when needed, ensuring that RING_CTRL_ENABLE remains asserted during abort, and treating an already stopped ring as a successful condition. Fixes: 9ad9a52cce ("i3c/master: introduce the mipi-i3c-hci driver") Cc: stable@vger.kernel.org Signed-off-by: Adrian Hunter <adrian.hunter@intel.com> Reviewed-by: Frank Li <Frank.Li@nxp.com> Link: https://patch.msgid.link/20260306072451.11131-9-adrian.hunter@intel.com Signed-off-by: Alexandre Belloni <alexandre.belloni@bootlin.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>		History 2026-03-19 16:08:48 +01:00
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master	i3c: mipi-i3c-hci: Correct RING_CTRL_ABORT handling in DMA dequeue	2026-03-19 16:08:48 +01:00
device.c	i3c: Fix i3c_device_do_priv_xfers() kernel-doc indentation	2025-07-31 01:23:12 +02:00
internals.h	i3c: fix big-endian FIFO transfers	2025-09-29 00:17:22 +02:00
Kconfig	i3c: Add core I3C infrastructure	2018-11-12 10:33:49 +01:00
Makefile	i3c: Add core I3C infrastructure	2018-11-12 10:33:49 +01:00
master.c	i3c: master: Update hot-join flag only on success	2026-02-26 14:58:57 -08:00