Merge tag 'drm-intel-gt-next-2025-10-29' of https://gitlab.freedesktop.org/drm/i915/kernel into drm-next

Driver Changes:

Fixes/improvements/new stuff:

- Set O_LARGEFILE in __create_shmem() (Taotao Chen)
- Fix incorrect error handling in shmem_pwrite() (Taotao Chen)
- Skip GuC communication warning on reset in progress [guc] (Zhanjun Dong)
- Fix conversion between clock ticks and nanoseconds [guc] (Umesh Nerlige Ramappa)

Miscellaneous:

- Avoid accessing uninitialized context in emit_rpcs_query() [selftests] (Krzysztof Karas)
- Fix typo in comment (I915_EXEC_NO_RELOC) [gem] (Marlon Henrique Sanches)

Backmerges:

- Merge drm/drm-next into drm-intel-gt-next (Joonas Lahtinen)

Signed-off-by: Simona Vetter <simona.vetter@ffwll.ch>
From: Tvrtko Ursulin <tursulin@igalia.com>
Link: https://patch.msgid.link/aQH994lQI_iVPzTI@linux

4 files changed, 17 insertions, 7 deletions

diff --git a/drivers/gpu/drm/i915/gem/i915_gem_execbuffer.c b/drivers/gpu/drm/i915/gem/i915_gem_execbuffer.c
index 39c7c32e1e74..7a0dee4111cb 100644
--- a/drivers/gpu/drm/i915/gem/i915_gem_execbuffer.c
+++ b/drivers/gpu/drm/i915/gem/i915_gem_execbuffer.c
@@ -142,7 +142,7 @@ enum {
  * we want to leave the object where it is and for all the existing relocations
  * to match. If the object is given a new address, or if userspace thinks the
  * object is elsewhere, we have to parse all the relocation entries and update
- * the addresses. Userspace can set the I915_EXEC_NORELOC flag to hint that
+ * the addresses. Userspace can set the I915_EXEC_NO_RELOC flag to hint that
  * all the target addresses in all of its objects match the value in the
  * relocation entries and that they all match the presumed offsets given by the
  * list of execbuffer objects. Using this knowledge, we know that if we haven't
diff --git a/drivers/gpu/drm/i915/gem/i915_gem_shmem.c b/drivers/gpu/drm/i915/gem/i915_gem_shmem.c
index b9dae15c1d16..26dda55a07ff 100644
--- a/drivers/gpu/drm/i915/gem/i915_gem_shmem.c
+++ b/drivers/gpu/drm/i915/gem/i915_gem_shmem.c
@@ -441,11 +441,20 @@ shmem_pwrite(struct drm_i915_gem_object *obj,
 	written = file->f_op->write_iter(&kiocb, &iter);
 	BUG_ON(written == -EIOCBQUEUED);
 
-	if (written != size)
-		return -EIO;
-
+	/*
+	 * First, check if write_iter returned a negative error.
+	 * If the write failed, return the real error code immediately.
+	 * This prevents it from being overwritten by the short write check below.
+	 */
 	if (written < 0)
 		return written;
+	/*
+	 * Check for a short write (written bytes != requested size).
+	 * Even if some data was written, return -EIO to indicate that the
+	 * write was not fully completed.
+	 */
+	if (written != size)
+		return -EIO;
 
 	return 0;
 }
diff --git a/drivers/gpu/drm/i915/gem/selftests/i915_gem_context.c b/drivers/gpu/drm/i915/gem/selftests/i915_gem_context.c
index eb0158e43417..1330c0b431a7 100644
--- a/drivers/gpu/drm/i915/gem/selftests/i915_gem_context.c
+++ b/drivers/gpu/drm/i915/gem/selftests/i915_gem_context.c
@@ -962,13 +962,14 @@ emit_rpcs_query(struct drm_i915_gem_object *obj,
 	if (IS_ERR(rpcs))
 		return PTR_ERR(rpcs);
 
+	i915_gem_ww_ctx_init(&ww, false);
+
 	batch = i915_vma_instance(rpcs, ce->vm, NULL);
 	if (IS_ERR(batch)) {
 		err = PTR_ERR(batch);
 		goto err_put;
 	}
 
-	i915_gem_ww_ctx_init(&ww, false);
 retry:
 	err = i915_gem_object_lock(obj, &ww);
 	if (!err)
diff --git a/drivers/gpu/drm/i915/gt/intel_gt_clock_utils.c b/drivers/gpu/drm/i915/gt/intel_gt_clock_utils.c
index 88b147fa5cb1..c90b35881a26 100644
--- a/drivers/gpu/drm/i915/gt/intel_gt_clock_utils.c
+++ b/drivers/gpu/drm/i915/gt/intel_gt_clock_utils.c
@@ -205,7 +205,7 @@ static u64 div_u64_roundup(u64 nom, u32 den)
 
 u64 intel_gt_clock_interval_to_ns(const struct intel_gt *gt, u64 count)
 {
-	return div_u64_roundup(count * NSEC_PER_SEC, gt->clock_frequency);
+	return mul_u64_u32_div(count, NSEC_PER_SEC, gt->clock_frequency);
 }
 
 u64 intel_gt_pm_interval_to_ns(const struct intel_gt *gt, u64 count)
@@ -215,7 +215,7 @@ u64 intel_gt_pm_interval_to_ns(const struct intel_gt *gt, u64 count)
 
 u64 intel_gt_ns_to_clock_interval(const struct intel_gt *gt, u64 ns)
 {
-	return div_u64_roundup(gt->clock_frequency * ns, NSEC_PER_SEC);
+	return mul_u64_u32_div(ns, gt->clock_frequency, NSEC_PER_SEC);
 }
 
 u64 intel_gt_ns_to_pm_interval(const struct intel_gt *gt, u64 ns)