Qiang Yu 9a8bf443f6 bus: mhi: host: Fix race between channel preparation and M0 event ... [ Upstream commit 869a99907f ] There is a race condition where mhi_prepare_channel() updates the read and write pointers as the base address and in parallel, if an M0 transition occurs, the tasklet goes ahead and rings doorbells for all channels with a delta in TRE rings assuming they are already enabled. This causes a null pointer access. Fix it by adding a channel enabled check before ringing channel doorbells. Cc: stable@vger.kernel.org # 5.19 Fixes: a6e2e3522f "bus: mhi: core: Add support for PM state transitions" Signed-off-by: Qiang Yu <quic_qianyu@quicinc.com> Reviewed-by: Manivannan Sadhasivam <mani@kernel.org> Link: https://lore.kernel.org/r/1665889532-13634-1-git-send-email-quic_qianyu@quicinc.com [mani: CCed stable list] Signed-off-by: Manivannan Sadhasivam <manivannan.sadhasivam@linaro.org> Signed-off-by: Sasha Levin <sashal@kernel.org>		2023-01-18 11:48:52 +01:00
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core	bus: mhi: host: Fix race between channel preparation and M0 event	2023-01-18 11:48:52 +01:00
Kconfig	bus: mhi: Add MHI PCI support for WWAN modems	2020-11-18 15:20:34 +05:30
Makefile	bus: mhi: Add MHI PCI support for WWAN modems	2020-11-18 15:20:34 +05:30
pci_generic.c	bus: mhi: host: pci_generic: add Telit FN990	2022-07-29 17:25:06 +02:00