tjh.dev / kernel
Linux kernel mirror (for testing) git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
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drm/xe/vf: Don't expose sysfs attributes not applicable for VFs

VFs can't read BMG_PCIE_CAP(0x138340) register nor access PCODE
(already guarded by the info.skip_pcode flag) so we shouldn't
expose attributes that require any of them to avoid errors like:

[] xe 0000:03:00.1: [drm] Tile0: GT0: VF is trying to read an \
inaccessible register 0x138340+0x0
[] RIP: 0010:xe_gt_sriov_vf_read32+0x6c2/0x9a0 [xe]
[] Call Trace:
[] xe_mmio_read32+0x110/0x280 [xe]
[] auto_link_downgrade_capable_show+0x2e/0x70 [xe]
[] dev_attr_show+0x1a/0x70
[] sysfs_kf_seq_show+0xaa/0x120
[] kernfs_seq_show+0x41/0x60

Fixes: 0e414bf7ad01 ("drm/xe: Expose PCIe link downgrade attributes")
Fixes: cdc36b66cd41 ("drm/xe: Expose fan control and voltage regulator version")
Signed-off-by: Michal Wajdeczko <michal.wajdeczko@intel.com>
Cc: Lucas De Marchi <lucas.demarchi@intel.com>
Cc: Lukasz Laguna <lukasz.laguna@intel.com>
Reviewed-by: Raag Jadav <raag.jadav@intel.com>
Reviewed-by: Lucas De Marchi <lucas.demarchi@intel.com>
Link: https://lore.kernel.org/r/20250916170029.3313-2-michal.wajdeczko@intel.com

Michal Wajdeczko a2d6223d 33fe111a

+1 -1
+1 -1
drivers/gpu/drm/xe/xe_device_sysfs.c
··· 308 308 return ret; 309 309 } 310 310 311 - if (xe->info.platform == XE_BATTLEMAGE) { 311 + if (xe->info.platform == XE_BATTLEMAGE && !IS_SRIOV_VF(xe)) { 312 312 ret = sysfs_create_files(&dev->kobj, auto_link_downgrade_attrs); 313 313 if (ret) 314 314 goto cleanup;