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Diffstat (limited to 'common/recipes-kernel/linux/linux-yocto-4.14.71/1079-drm-amdgpu-fix-kernel-hang-when-starting-VNC-server.patch')
-rw-r--r--common/recipes-kernel/linux/linux-yocto-4.14.71/1079-drm-amdgpu-fix-kernel-hang-when-starting-VNC-server.patch70
1 files changed, 70 insertions, 0 deletions
diff --git a/common/recipes-kernel/linux/linux-yocto-4.14.71/1079-drm-amdgpu-fix-kernel-hang-when-starting-VNC-server.patch b/common/recipes-kernel/linux/linux-yocto-4.14.71/1079-drm-amdgpu-fix-kernel-hang-when-starting-VNC-server.patch
new file mode 100644
index 00000000..bd481d94
--- /dev/null
+++ b/common/recipes-kernel/linux/linux-yocto-4.14.71/1079-drm-amdgpu-fix-kernel-hang-when-starting-VNC-server.patch
@@ -0,0 +1,70 @@
+From 52b6c7e92f5eafe1e2cc1dac5679cc8bad1348f5 Mon Sep 17 00:00:00 2001
+From: "Xiangliang.Yu" <Xiangliang.Yu@amd.com>
+Date: Fri, 20 Oct 2017 17:21:40 +0800
+Subject: [PATCH 1079/4131] drm/amdgpu: fix kernel hang when starting VNC
+ server
+MIME-Version: 1.0
+Content-Type: text/plain; charset=UTF-8
+Content-Transfer-Encoding: 8bit
+
+After starting VNC server or running CTS test, kernel will hang and
+can see below call trace:
+
+[961816] INFO: task khugepaged:42 blocked for more than 120 seconds.
+[968581] Tainted: G OE 4.13.0 #1
+[973495] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables
+ this message.
+[980962] khugepaged D 0 42 2 0x00000000
+[980967] Call Trace:
+[980977] __schedule+0x28d/0x890
+[980982] schedule+0x36/0x80
+[980986] rwsem_down_read_failed+0x139/0x1c0
+[980991] ? update_curr+0x100/0x1c0
+[981004] call_rwsem_down_read_failed+0x18/0x30
+[981007] down_read+0x20/0x40
+[981012] khugepaged_scan_mm_slot+0x78/0x1ac0
+[981018] ? __switch_to+0x23e/0x4a0
+[981022] ? finish_task_switch+0x79/0x240
+[981026] khugepaged+0x146/0x480
+[981031] ? remove_wait_queue+0x60/0x60
+[981035] kthread+0x109/0x140
+[981037] ? khugepaged_scan_mm_slot+0x1ac0/0x1ac0
+[981039] ? kthread_park+0x60/0x60
+[981044] ret_from_fork+0x25/0x30
+
+After checking code and found 'commit b72cf4fca2bb7 ("drm/amdgpu: move
+taking mmap_sem into get_user_pages v2")' forget to drop one case of
+up_read.
+
+Signed-off-by: Xiangliang.Yu <Xiangliang.Yu@amd.com>
+Reviewed-by: Christian König <christian.koenig@amd.com>
+---
+ drivers/gpu/drm/amd/amdgpu/amdgpu_gem.c | 5 +----
+ 1 file changed, 1 insertion(+), 4 deletions(-)
+
+diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_gem.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_gem.c
+index bbc3d1e..19631d0 100644
+--- a/drivers/gpu/drm/amd/amdgpu/amdgpu_gem.c
++++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_gem.c
+@@ -436,7 +436,7 @@ int amdgpu_gem_userptr_ioctl(struct drm_device *dev, void *data,
+ r = amdgpu_ttm_tt_get_user_pages(bo->tbo.ttm,
+ bo->tbo.ttm->pages);
+ if (r)
+- goto unlock_mmap_sem;
++ goto release_object;
+
+ r = amdgpu_bo_reserve(bo, true);
+ if (r)
+@@ -461,9 +461,6 @@ int amdgpu_gem_userptr_ioctl(struct drm_device *dev, void *data,
+ free_pages:
+ release_pages(bo->tbo.ttm->pages, bo->tbo.ttm->num_pages, false);
+
+-unlock_mmap_sem:
+- up_read(&current->mm->mmap_sem);
+-
+ release_object:
+ drm_gem_object_put_unlocked(gobj);
+
+--
+2.7.4
+