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From: Jose Ignacio Tornos Martinez <jtornosm@redhat.com>
To: helgaas@kernel.org
Cc: alex@shazbot.org, ath11k@lists.infradead.org,
	ath12k@lists.infradead.org, bhelgaas@google.com, jgg@ziepe.ca,
	jjohnson@kernel.org, johannes@sipsolutions.net,
	jtornosm@redhat.com, kevin.tian@intel.com, kvm@vger.kernel.org,
	linux-arm-msm@vger.kernel.org, linux-kernel@vger.kernel.org,
	linux-pci@vger.kernel.org, linux-wireless@vger.kernel.org,
	mani@kernel.org, skolothumtho@nvidia.com, yishaih@nvidia.com
Subject: Re: [PATCH 4/7] ath11k: add PCIe link recovery retry
Date: Thu, 15 Oct 2026 08:57:00 +0200	[thread overview]
Message-ID: <20261015065700.120184-1-jtornosm@redhat.com> (raw)
In-Reply-To: <20261014165829.GA1636877@bhelgaas>

Hi Bjorn,

> Link down is a PCIe reset of the endpoint, which should clear all
> PCIe-specific state, e.g., BAR values.  Is that restored somewhere?

PCIE_SOC_GLOBAL_RESET is a device-internal SoC reset, not a PCIe
fundamental reset. The link drops transiently but PCI configuration
space (including BARs) survives. Only a device-specific window
register needs restoration, handled by ath11k_pci_restore_window()
right after. Same pattern as ath12k.

Thanks

Best regards
Jose Ignacio


  reply	other threads:[~2026-10-15  6:57 UTC|newest]

Thread overview: 23+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2026-09-30 14:08 [PATCH 0/7] Enable Qualcomm WiFi PCIe passthrough to VMs Jose Ignacio Tornos Martinez
2026-09-30 14:08 ` [PATCH 1/7] PCI: Add pci_find_free_ext_cap_offset() helper Jose Ignacio Tornos Martinez
2026-09-30 14:08 ` [PATCH 2/7] vfio: Add qcom_vfio.h header for MSI cache protocol Jose Ignacio Tornos Martinez
2026-09-30 14:08 ` [PATCH 3/7] vfio/pci: Add qcom-vfio-pci variant driver Jose Ignacio Tornos Martinez
2026-09-30 15:12   ` Jason Gunthorpe
2026-10-01  7:19     ` Jose Ignacio Tornos Martinez
2026-10-02 17:10       ` Jason Gunthorpe
2026-10-05 11:01         ` Jose Ignacio Tornos Martinez
2026-09-30 14:08 ` [PATCH 4/7] ath11k: add PCIe link recovery retry Jose Ignacio Tornos Martinez
2026-10-14 16:58   ` Bjorn Helgaas
2026-10-15  6:57     ` Jose Ignacio Tornos Martinez [this message]
2026-09-30 14:08 ` [PATCH 5/7] ath11k: Use VFIO MSI cache when available Jose Ignacio Tornos Martinez
2026-09-30 14:08 ` [PATCH 6/7] ath12k: add PCIe link recovery retry Jose Ignacio Tornos Martinez
2026-09-30 14:08 ` [PATCH 7/7] ath12k: Use VFIO MSI cache when available Jose Ignacio Tornos Martinez
2026-10-11  7:54 ` [PATCH 0/7] Enable Qualcomm WiFi PCIe passthrough to VMs Jose Ignacio Tornos Martinez
2026-10-11 13:25   ` Jason Gunthorpe
2026-10-13 13:43     ` Jose Ignacio Tornos Martinez
2026-10-13 14:03       ` Jason Gunthorpe
2026-10-13 15:42         ` Jose Ignacio Tornos Martinez
2026-10-14 15:00           ` Jason Gunthorpe
2026-10-14 20:46             ` Michael Kelley
2026-10-15  0:06               ` Jason Gunthorpe
2026-10-15  7:09             ` Jose Ignacio Tornos Martinez

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