Chunkai Deng 786439ad58 rpmsg: glink: smem: order FIFO read after availability check ... glink_smem_rx_peek() reads the RX FIFO payload after the caller has determined data is available via glink_smem_rx_avail(), which reads the remote-updated head index. A control dependency between the head read and the subsequent payload read does not order the two loads, so the CPU may speculatively read the FIFO before observing the head update and consume stale data the remote has not yet published. Add rmb() in glink_smem_rx_peek() before the memcpy_fromio() so the availability (head) read is ordered ahead of the FIFO payload read, matching the consumer pattern in Documentation/core-api/circular-buffers.rst. Fixes: caf989c350 ("rpmsg: glink: Introduce glink smem based transport") Cc: stable@vger.kernel.org Signed-off-by: Chunkai Deng <chunkai.deng@oss.qualcomm.com> Reviewed-by: Konrad Dybcio <konrad.dybcio@oss.qualcomm.com> Link: https://lore.kernel.org/r/20260618-rpmsg-glink-smem-mb-v1-1-68a026453a69@oss.qualcomm.com Signed-off-by: Bjorn Andersson <andersson@kernel.org>		2026-07-13 22:11:52 -05:00
..
Kconfig
Makefile
mtk_rpmsg.c
qcom_glink_native.c	rpmsg: glink: fix deadlock in endpoint destroy during driver detach	2026-07-13 21:55:29 -05:00
qcom_glink_native.h
qcom_glink_rpm.c
qcom_glink_smem.c	rpmsg: glink: smem: order FIFO read after availability check	2026-07-13 22:11:52 -05:00
qcom_glink_ssr.c
qcom_glink_trace.h
qcom_smd.c	rpmsg: Replace sprintf() with sysfs_emit() in sysfs show	2026-07-09 14:45:34 -05:00
rpmsg_char.c	rpmsg: char: Check for ongoing chrdev destroy	2026-07-09 15:11:17 -05:00
rpmsg_char.h
rpmsg_core.c	rpmsg: core: Fix incorrect return value documentation	2026-07-09 14:45:37 -05:00
rpmsg_ctrl.c
rpmsg_internal.h
rpmsg_ns.c
virtio_rpmsg_bus.c