Qiang Yu 20a6dea2d1 bus: mhi: host: Drop chan lock before queuing buffers ... commit 01bd694ac2f682fb8017e16148b928482bc8fa4b upstream. Ensure read and write locks for the channel are not taken in succession by dropping the read lock from parse_xfer_event() such that a callback given to client can potentially queue buffers and acquire the write lock in that process. Any queueing of buffers should be done without channel read lock acquired as it can result in multiple locks and a soft lockup. Cc: <stable@vger.kernel.org> # 5.7 Fixes: 1d3173a3ba ("bus: mhi: core: Add support for processing events from client device") Signed-off-by: Qiang Yu <quic_qianyu@quicinc.com> Reviewed-by: Jeffrey Hugo <quic_jhugo@quicinc.com> Tested-by: Jeffrey Hugo <quic_jhugo@quicinc.com> Reviewed-by: Manivannan Sadhasivam <manivannan.sadhasivam@linaro.org> Link: https://lore.kernel.org/r/1702276972-41296-3-git-send-email-quic_qianyu@quicinc.com [mani: added fixes tag and cc'ed stable] Signed-off-by: Manivannan Sadhasivam <manivannan.sadhasivam@linaro.org> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>		2024-02-23 08:41:53 +01:00
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host	bus: mhi: host: Drop chan lock before queuing buffers	2024-02-23 08:41:53 +01:00
Kconfig	bus: mhi: Move host MHI code to "host" directory	2023-08-26 15:26:48 +02:00
Makefile	bus: mhi: Move host MHI code to "host" directory	2023-08-26 15:26:48 +02:00