From: Mostafa Saleh <smostafa@google.com>
To: linux-kernel@vger.kernel.org, dmaengine@vger.kernel.org
Cc: linux-arm-msm@vger.kernel.org, vkoul@kernel.org,
Frank.Li@kernel.org, bartosz.golaszewski@oss.qualcomm.com,
Mostafa Saleh <smostafa@google.com>
Subject: [PATCH v2 0/2] dmaengine: qcom: bam_dma: Fixes for unbind
Date: Fri, 23 Oct 2026 10:15:34 +0000 [thread overview]
Message-ID: <20261023101536.3965344-1-smostafa@google.com> (raw)
On Lenovo Mini-x Gen 10 (X1P42100 based) I am using VFIO-platform
to assign the QCE/BAM to VMs.
During unbind:
echo 1dc4000.dma-controller > /sys/bus/platform/drivers/bam-dma-engine/unbind
echo 1dfa000.crypto > /sys/bus/platform/drivers/qcrypto/unbind
I see a system reset quite often, looking more into this,
that seems to be related to runtime PM, with those fixes I don't
see that anymore.
This patches apply on linux-next.
Changes in v2:
v1: https://lore.kernel.org/all/20261020180804.140766-1-smostafa@google.com/
- Collect Frank Rb
- Drop call to pm_runtime_dont_use_autosuspend()
Mostafa Saleh (2):
dmaengine: qcom: bam_dma: Take a PM ref at remove()
dmaengine: qcom: bam_dma: Do not touch remote BAM in remove()
drivers/dma/qcom/bam_dma.c | 17 ++++++++++++-----
1 file changed, 12 insertions(+), 5 deletions(-)
base-commit: bd1ecbb61afefc6a8b876ccbc31e9228b44e9eab
--
2.56.0.307.g5fe7bd680c-goog
next reply other threads:[~2026-10-23 10:16 UTC|newest]
Thread overview: 4+ messages / expand[flat|nested] mbox.gz Atom feed top
2026-10-23 10:15 Mostafa Saleh [this message]
2026-10-23 10:15 ` [PATCH v2 1/2] dmaengine: qcom: bam_dma: Take a PM ref at remove() Mostafa Saleh
2026-10-23 19:38 ` Frank Li
2026-10-23 10:15 ` [PATCH v2 2/2] dmaengine: qcom: bam_dma: Do not touch remote BAM in remove() Mostafa Saleh
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