[PATCH 1/4] drm/amdkfd: Fix permissions of hang_hws

[Russell, Kent]

[AMD Official Use Only - Internal Distribution Only]

Reviewed-by: Kent Russell <kent.russell at amd.com>

-----Original Message-----
From: amd-gfx <amd-gfx-bounces at lists.freedesktop.org> On Behalf Of Felix Kuehling
Sent: Friday, December 20, 2019 3:30 AM
To: amd-gfx at lists.freedesktop.org
Subject: [PATCH 1/4] drm/amdkfd: Fix permissions of hang_hws

Reading from /sys/kernel/debug/kfd/hang_hws would cause a kernel oops because we didn't implement a read callback. Set the permission to write-only to prevent that.

Signed-off-by: Felix Kuehling <Felix.Kuehling at amd.com>
---
 drivers/gpu/drm/amd/amdkfd/kfd_debugfs.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/gpu/drm/amd/amdkfd/kfd_debugfs.c b/drivers/gpu/drm/amd/amdkfd/kfd_debugfs.c
index 15c523027285..511712c2e382 100644
--- a/drivers/gpu/drm/amd/amdkfd/kfd_debugfs.c
+++ b/drivers/gpu/drm/amd/amdkfd/kfd_debugfs.c
@@ -93,7 +93,7 @@ void kfd_debugfs_init(void)
 			    kfd_debugfs_hqds_by_device, &kfd_debugfs_fops);
 	debugfs_create_file("rls", S_IFREG | 0444, debugfs_root,
 			    kfd_debugfs_rls_by_device, &kfd_debugfs_fops);
-	debugfs_create_file("hang_hws", S_IFREG | 0644, debugfs_root,
+	debugfs_create_file("hang_hws", S_IFREG | 0200, debugfs_root,
 			    NULL, &kfd_debugfs_hang_hws_fops);  }
 
--
2.24.1

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