From 9c057dbe7457bd69e3f420abc456cf84eb590a39 Mon Sep 17 00:00:00 2001
From: Ramalingam C <ramalingam.c@intel.com>
Date: Tue, 5 Apr 2022 20:38:35 +0530
Subject: drm/i915/gt: Pass the -EINVAL when emit_pte doesn't update any PTE
Git-commit: 310bf25df2fcccc1d91f96928adb66bdc26613b5
Patch-mainline: v5.19-rc1
References: jsc#PED-1166 jsc#PED-1168 jsc#PED-1170 jsc#PED-1218 jsc#PED-1220 jsc#PED-1222 jsc#PED-1223 jsc#PED-1225
When emit_pte doesn't update any PTE with return value as 0, interpret
it as -EINVAL.
v2:
Add missing goto [Thomas]
Signed-off-by: Ramalingam C <ramalingam.c@intel.com>
Reviewed-by: Thomas Hellstrom <thomas.hellstrom@linux.intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20220405150840.29351-5-ramalingam.c@intel.com
Acked-by: Patrik Jakobsson <pjakobsson@suse.de>
---
drivers/gpu/drm/i915/gt/intel_migrate.c | 6 +++++-
1 file changed, 5 insertions(+), 1 deletion(-)
diff --git a/drivers/gpu/drm/i915/gt/intel_migrate.c b/drivers/gpu/drm/i915/gt/intel_migrate.c
index e0f1c727662e..6378d4450e1a 100644
--- a/drivers/gpu/drm/i915/gt/intel_migrate.c
+++ b/drivers/gpu/drm/i915/gt/intel_migrate.c
@@ -577,7 +577,11 @@ intel_context_migrate_copy(struct intel_context *ce,
len = emit_pte(rq, &it_src, src_cache_level, src_is_lmem,
src_offset, CHUNK_SZ);
- if (len <= 0) {
+ if (!len) {
+ err = -EINVAL;
+ goto out_rq;
+ }
+ if (len < 0) {
err = len;
goto out_rq;
}
--
2.38.1