summaryrefslogtreecommitdiffstats
path: root/drivers/dma/idxd/init.c
diff options
context:
space:
mode:
Diffstat (limited to 'drivers/dma/idxd/init.c')
-rw-r--r--drivers/dma/idxd/init.c15
1 files changed, 12 insertions, 3 deletions
diff --git a/drivers/dma/idxd/init.c b/drivers/dma/idxd/init.c
index 0eb1c827a2..d09a8553ea 100644
--- a/drivers/dma/idxd/init.c
+++ b/drivers/dma/idxd/init.c
@@ -342,7 +342,9 @@ static void idxd_cleanup_internals(struct idxd_device *idxd)
static int idxd_init_evl(struct idxd_device *idxd)
{
struct device *dev = &idxd->pdev->dev;
+ unsigned int evl_cache_size;
struct idxd_evl *evl;
+ const char *idxd_name;
if (idxd->hw.gen_cap.evl_support == 0)
return 0;
@@ -354,9 +356,16 @@ static int idxd_init_evl(struct idxd_device *idxd)
spin_lock_init(&evl->lock);
evl->size = IDXD_EVL_SIZE_MIN;
- idxd->evl_cache = kmem_cache_create(dev_name(idxd_confdev(idxd)),
- sizeof(struct idxd_evl_fault) + evl_ent_size(idxd),
- 0, 0, NULL);
+ idxd_name = dev_name(idxd_confdev(idxd));
+ evl_cache_size = sizeof(struct idxd_evl_fault) + evl_ent_size(idxd);
+ /*
+ * Since completion record in evl_cache will be copied to user
+ * when handling completion record page fault, need to create
+ * the cache suitable for user copy.
+ */
+ idxd->evl_cache = kmem_cache_create_usercopy(idxd_name, evl_cache_size,
+ 0, 0, 0, evl_cache_size,
+ NULL);
if (!idxd->evl_cache) {
kfree(evl);
return -ENOMEM;