On Mon, Sep 07, 2026 at 10:59:18AM +0200, Janusz Krzysztofik wrote:
> DRM CI consistently reports failing device reset attempts on Intel DG1
> discrete graphics adapters. Manual reproduction attempts allowed to
> narrow down the scope of that problem to a specific revision of that
> hardware, SKU 8086:4905. It has been confirmed that both reset methods
> claimed by the device, i.e., flr and bus, suffer from that issue.
>
> Since consecutively failing device resets may lead to system hangs,
> disable both useless reset methods. A respective CI test will then be
> skipped instead of aborting whole CI jobs.
>
> Suggested-by: Joonas Lahtinen <[email protected]>
> Closes: https://gitlab.freedesktop.org/drm/i915/kernel/-/work_items/11814
> Reviewed-by: Andi Shyti <[email protected]>
> Reviewed-by: Krzysztof Karas <[email protected]>
> Signed-off-by: Janusz Krzysztofik <[email protected]>
Applied to pci/reset for v7.4, thanks!
> ---
> v2: Fix commit description wording (Andi)
> - add Suggested-by: tag missing from v1,
> - add collected Reviewed-by: tags.
>
> drivers/pci/quirks.c | 5 +++++
> 1 file changed, 5 insertions(+)
>
> diff --git a/drivers/pci/quirks.c b/drivers/pci/quirks.c
> index de9bbccda21fd..e55475374c6fd 100644
> --- a/drivers/pci/quirks.c
> +++ b/drivers/pci/quirks.c
> @@ -3811,6 +3811,9 @@ DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_TI, 0xb005,
> quirk_no_bus_reset);
> */
> DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_ASMEDIA, 0x1164, quirk_no_bus_reset);
>
> +/* Intel DG1 0x4905 may not recover from bus reset */
> +DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_INTEL, 0x4905, quirk_no_bus_reset);
> +
> static void quirk_no_pm_reset(struct pci_dev *dev)
> {
> /*
> @@ -5597,6 +5600,7 @@ DECLARE_PCI_FIXUP_EARLY(PCI_VENDOR_ID_INTEL, 0x443,
> quirk_intel_qat_vf_cap);
> * AMD Neural Processing Unit 0x1502 0x17f0
> * Intel 82579LM Gigabit Ethernet Controller 0x1502
> * Intel 82579V Gigabit Ethernet Controller 0x1503
> + * Intel DG1 Discrete Graphics Adapter 0x4905
> * Mediatek MT7922 802.11ax PCI Express Wireless Network Adapter
> * Mediatek MT7925 802.11be PCI Express Wireless Network Adapter
> */
> @@ -5612,6 +5616,7 @@ DECLARE_PCI_FIXUP_EARLY(PCI_VENDOR_ID_AMD, 0x1502,
> quirk_no_flr);
> DECLARE_PCI_FIXUP_EARLY(PCI_VENDOR_ID_AMD, 0x17f0, quirk_no_flr);
> DECLARE_PCI_FIXUP_EARLY(PCI_VENDOR_ID_INTEL, 0x1502, quirk_no_flr);
> DECLARE_PCI_FIXUP_EARLY(PCI_VENDOR_ID_INTEL, 0x1503, quirk_no_flr);
> +DECLARE_PCI_FIXUP_EARLY(PCI_VENDOR_ID_INTEL, 0x4905, quirk_no_flr);
> DECLARE_PCI_FIXUP_EARLY(PCI_VENDOR_ID_MEDIATEK, 0x0616, quirk_no_flr);
> DECLARE_PCI_FIXUP_EARLY(PCI_VENDOR_ID_MEDIATEK, 0x7925, quirk_no_flr);
>
> --
> 2.54.0
>
