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From: "Michael J. Ruhl" <michael.j.ruhl@intel.com>
To: platform-driver-x86@vger.kernel.org,
	intel-xe@lists.freedesktop.org, hansg@kernel.org,
	ilpo.jarvinen@linux.intel.com, matthew.brost@intel.com,
	rodrigo.vivi@intel.com, thomas.hellstrom@linux.intel.com,
	airlied@gmail.com, simona@ffwll.ch, david.e.box@linux.intel.com,
	anoop.c.vijay@intel.com, badal.nilawar@intel.com,
	matthew.d.roper@intel.com, james.ausmus@intel.com,
	karthik.poosa@intel.com
Subject: [PATCH v11 07/20] drm/xe/vsec: Correct locking order
Date: Wed, 23 Sep 2026 11:11:22 -0700	[thread overview]
Message-ID: <20260923181115.2514193-29-michael.j.ruhl@intel.com> (raw)
In-Reply-To: <20260923181115.2514193-22-michael.j.ruhl@intel.com>

Xe locking order is power state first, and then local locks.

Reorder locking for correct usage.

Reviewed-by: Rodrigo Vivi <rodrigo.vivi@intel.com>
Signed-off-by: Michael J. Ruhl <michael.j.ruhl@intel.com>
---
 drivers/gpu/drm/xe/xe_vsec.c | 11 ++++++-----
 1 file changed, 6 insertions(+), 5 deletions(-)

diff --git a/drivers/gpu/drm/xe/xe_vsec.c b/drivers/gpu/drm/xe/xe_vsec.c
index 178f22db4046..d93c042cf25b 100644
--- a/drivers/gpu/drm/xe/xe_vsec.c
+++ b/drivers/gpu/drm/xe/xe_vsec.c
@@ -157,16 +157,17 @@ int xe_pmt_telem_read(struct device *dev, u32 guid, u64 *data, loff_t user_offse
 
 	telem_addr += offset + user_offset;
 
-	guard(mutex)(&xe->pmt.lock);
-
 	/* indicate that we are not at an appropriate power level */
 	if (!xe_pm_runtime_get_if_active(xe))
 		return -ENODATA;
 
-	/* set SoC re-mapper index register based on GUID memory region */
-	xe->soc_remapper.set_telem_region(xe, mem_region);
+	scoped_guard(mutex, &xe->pmt.lock) {
+		/* set SoC re-mapper index register based on GUID memory region */
+		xe->soc_remapper.set_telem_region(xe, mem_region);
+
+		memcpy_fromio(data, telem_addr, count);
+	}
 
-	memcpy_fromio(data, telem_addr, count);
 	xe_pm_runtime_put(xe);
 
 	return count;
-- 
2.43.0


  parent reply	other threads:[~2026-09-23 18:11 UTC|newest]

Thread overview: 36+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2026-09-23 18:11 [PATCH v11 00/20] Crescent Island PMT support Michael J. Ruhl
2026-09-23 18:11 ` [PATCH v11 01/20] platform/x86/intel/pmt: complete pcidev to device update Michael J. Ruhl
2026-09-23 18:11 ` [PATCH v11 02/20] platform/x86/intel/pmt: refactor rmw with a return value Michael J. Ruhl
2026-09-23 18:11 ` [PATCH v11 03/20] platform/x86/intel/pmt: refactor rc " Michael J. Ruhl
2026-09-23 18:11 ` [PATCH v11 04/20] platform/x86/intel/pmt: Add register access callbacks Michael J. Ruhl
2026-09-23 18:11 ` [PATCH v11 05/20] platform/x86/intel/pmt: Do not remap when using callbacks Michael J. Ruhl
2026-09-23 18:29   ` sashiko-bot
2026-09-29 13:12   ` Rodrigo Vivi
2026-09-23 18:11 ` [PATCH v11 06/20] drm/xe/vsec: Do not register BMG PMT for VF Michael J. Ruhl
2026-09-23 18:11 ` Michael J. Ruhl [this message]
2026-09-23 18:11 ` [PATCH v11 08/20] drm/xe/vsec: Use correct pm state get Michael J. Ruhl
2026-09-23 18:11 ` [PATCH v11 09/20] drm/xe/vsec: Add DOC text for VSEC Michael J. Ruhl
2026-09-23 18:11 ` [PATCH v11 10/20] drm/xe/vsec: Support possible hotplug exit Michael J. Ruhl
2026-09-23 18:18   ` sashiko-bot
2026-09-23 18:11 ` [PATCH v11 11/20] drm/xe/vsec: Refactor BattleMage PMT defines Michael J. Ruhl
2026-09-23 18:11 ` [PATCH v11 12/20] drm/xe/vsec: Update VSEC probe order Michael J. Ruhl
2026-09-23 18:11 ` [PATCH v11 13/20] drm/xe/vsec: Add base_offset to allow for more flexibilty Michael J. Ruhl
2026-09-23 18:11 ` [PATCH v11 14/20] drm/xe/vsec: Support Crescent Island PMT Michael J. Ruhl
2026-09-23 18:11 ` [PATCH v11 15/20] drm/xe/vsec: Crescent Island PMT decode Michael J. Ruhl
2026-09-23 18:11 ` [PATCH v11 16/20] drm/xe/vsec: Crescent Island PMT callbacks Michael J. Ruhl
2026-09-23 18:28   ` sashiko-bot
2026-09-23 18:11 ` [PATCH v11 17/20] drm/xe/vsec: Support late bind fw information Michael J. Ruhl
2026-09-23 18:31   ` sashiko-bot
2026-09-30  4:09   ` Rodrigo Vivi
2026-09-30 12:57     ` Ruhl, Michael J
2026-09-30 13:04       ` Rodrigo Vivi
2026-09-23 18:11 ` [PATCH v11 18/20] drm/xe/vsec: Add PMT GUID internal access Michael J. Ruhl
2026-09-23 18:11 ` [PATCH v11 19/20] drm/xe/vsec: Update PMT " Michael J. Ruhl
2026-09-23 18:11 ` [PATCH v11 20/20] drm/xe/vsec: Refactor platform check Michael J. Ruhl
2026-09-23 18:20 ` ✗ CI.checkpatch: warning for Crescent Island PMT support (rev13) Patchwork
2026-09-23 18:22 ` ✓ CI.KUnit: success " Patchwork
2026-09-23 20:26 ` ✓ Xe.CI.BAT: " Patchwork
2026-09-24  8:49 ` ✗ Xe.CI.FULL: failure " Patchwork
2026-09-29  8:12 ` [PATCH v11 00/20] Crescent Island PMT support Ilpo Järvinen
2026-09-29 13:20   ` Rodrigo Vivi
2026-09-30  6:23     ` Ilpo Järvinen

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