Commit f6c1345a authored by Matthew Brost's avatar Matthew Brost
Browse files

drm/xe: Avoid PM wake reference during VF migration 



Virtual Functions (VFs) do not use runtime PM. Avoid taking PM
references during VF migration, as lockdep may get confused—VF migration
occurs in the reclaim path, and waking a PM reference can trigger memory
allocation warnings.

Signed-off-by: default avatarMatthew Brost <matthew.brost@intel.com>
Reviewed-by: default avatarMatthew Auld <matthew.auld@intel.com>
Link: https://lore.kernel.org/r/20251022005538.828980-4-matthew.brost@intel.com
parent 480b358e

drivers/gpu/drm/xe/xe_gt_sriov_vf.c

+0 −5
Original line number Diff line number Diff line
@@ -31,7 +31,6 @@ 
#include "xe_lrc.h"

#include "xe_memirq.h"

#include "xe_mmio.h"

#include "xe_pm.h"

#include "xe_sriov.h"

#include "xe_sriov_vf.h"

#include "xe_sriov_vf_ccs.h"
@@ -1218,7 +1217,6 @@ static void vf_post_migration_recovery(struct xe_gt *gt) 


	xe_gt_sriov_dbg(gt, "migration recovery in progress\n");



	xe_pm_runtime_get(xe);

	retry = vf_post_migration_shutdown(gt);

	if (retry)

		goto queue;
@@ -1241,12 +1239,10 @@ static void vf_post_migration_recovery(struct xe_gt *gt) 


	vf_post_migration_kickstart(gt);



	xe_pm_runtime_put(xe);

	xe_gt_sriov_notice(gt, "migration recovery ended\n");

	return;

fail:

	vf_post_migration_abort(gt);

	xe_pm_runtime_put(xe);

	xe_gt_sriov_err(gt, "migration recovery failed (%pe)\n", ERR_PTR(err));

	xe_device_declare_wedged(xe);

	return;
@@ -1254,7 +1250,6 @@ static void vf_post_migration_recovery(struct xe_gt *gt) 
queue:

	xe_gt_sriov_info(gt, "Re-queuing migration recovery\n");

	queue_work(gt->ordered_wq, &gt->sriov.vf.migration.worker);

	xe_pm_runtime_put(xe);

}



static void migration_worker_func(struct work_struct *w)