From: Sumit Kumar <sumit.kumar@oss.qualcomm.com>
To: Manivannan Sadhasivam <mani@kernel.org>,
Alex Elder <elder@kernel.org>,
Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Cc: mhi@lists.linux.dev, linux-arm-msm@vger.kernel.org,
linux-kernel@vger.kernel.org,
Veerabhadrarao Badiganti
<veerabhadrarao.badiganti@oss.qualcomm.com>,
Subramanian Ananthanarayanan
<subramanian.ananthanarayanan@oss.qualcomm.com>,
Akhil Vinod <akhil.vinod@oss.qualcomm.com>,
Sumit Kumar <sumit.kumar@oss.qualcomm.com>
Subject: [PATCH v2 0/2] bus: mhi: ep: Fix state_lock protection issues
Date: Tue, 14 Apr 2026 11:59:39 +0530 [thread overview]
Message-ID: <20260414-reset_worker_deadlock-v2-0-42fd682b45db@oss.qualcomm.com> (raw)
This series fixes a deadlock in mhi_ep_reset_worker() where state_lock is
acquired twice, and adds missing lock protection for mhi_state access in
mhi_ep_power_up() to prevent race conditions and state machine corruption.
Signed-off-by: Sumit Kumar <sumit.kumar@oss.qualcomm.com>
---
Changes in v2:
- Move `mhi_ep_mmio_reset()` out of state mutex lock.(Mani).
- Removed the mutex lock from `mhi_ep_handle_syserr()`, since the caller of
mhi_ep_handle_syserr() holds the lock.(Mani)
- Link to v1: https://lore.kernel.org/r/20260203-reset_worker_deadlock-v1-0-7ed889b5bf19@oss.qualcomm.com
---
Sumit Kumar (2):
bus: mhi: ep: Fix potential deadlock in mhi_ep_reset_worker()
bus: mhi: ep: Add missing state_lock protection for mhi_state access
drivers/bus/mhi/ep/main.c | 9 +++++----
1 file changed, 5 insertions(+), 4 deletions(-)
---
base-commit: 6fa9041b7177f6771817b95e83f6df17b147c8c6
change-id: 20251113-reset_worker_deadlock-0223907f7c9d
Best regards,
--
Sumit Kumar <sumit.kumar@oss.qualcomm.com>
next reply other threads:[~2026-04-14 6:29 UTC|newest]
Thread overview: 4+ messages / expand[flat|nested] mbox.gz Atom feed top
2026-04-14 6:29 Sumit Kumar [this message]
2026-04-14 6:29 ` [PATCH v2 1/2] bus: mhi: ep: Fix potential deadlock in mhi_ep_reset_worker() Sumit Kumar
2026-04-14 6:29 ` [PATCH v2 2/2] bus: mhi: ep: Add missing state_lock protection for mhi_state access Sumit Kumar
2026-05-12 14:31 ` [PATCH v2 0/2] bus: mhi: ep: Fix state_lock protection issues Manivannan Sadhasivam
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