From: jsg <jsg@openbsd.org>
Date: Thu, 14 Apr 2022 08:38:48 +0000 (+0000)
Subject: drm/amdkfd: Don't take process mutex for svm ioctls
X-Git-Url: http://artulab.com/gitweb/?a=commitdiff_plain;h=6b0be0d3d85d7011dcbc447755cd4cf1b87964ca;p=openbsd

drm/amdkfd: Don't take process mutex for svm ioctls

From Philip Yang
e84b0438010d3359ae4830ba44108150f4839a92 in linux 5.15.y/5.15.34
ac7c48c0cce00d03b3c95fddcccb0a45257e33e3 in mainline linux
---

diff --git a/sys/dev/pci/drm/amd/amdkfd/kfd_chardev.c b/sys/dev/pci/drm/amd/amdkfd/kfd_chardev.c
index 444ad4ebcaf..f800dbfc048 100644
--- a/sys/dev/pci/drm/amd/amdkfd/kfd_chardev.c
+++ b/sys/dev/pci/drm/amd/amdkfd/kfd_chardev.c
@@ -1807,13 +1807,9 @@ static int kfd_ioctl_svm(struct file *filep, struct kfd_process *p, void *data)
 	if (!args->start_addr || !args->size)
 		return -EINVAL;
 
-	mutex_lock(&p->mutex);
-
 	r = svm_ioctl(p, args->op, args->start_addr, args->size, args->nattr,
 		      args->attrs);
 
-	mutex_unlock(&p->mutex);
-
 	return r;
 }
 #else