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uacce: add print information if not enable sva

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Add print information necessary if user not enable sva.

Signed-off-by: Kai Ye <yekai13@huawei.com>
Link: https://lore.kernel.org/r/1623233345-8765-1-git-send-email-yekai13@huawei.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Kai Ye 2021-06-09 18:09:05 +08:00 committed by Greg Kroah-Hartman
parent 7504112065
commit 762b296bcb
1 changed files with 9 additions and 2 deletions
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11
drivers/misc/uacce/uacce.c
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@ -387,15 +387,22 @@ static void uacce_release(struct device *dev)
static unsigned int uacce_enable_sva(struct device *parent, unsigned int flags)
{
int ret;
if (!(flags & UACCE_DEV_SVA))
return flags;
flags &= ~UACCE_DEV_SVA;
if (iommu_dev_enable_feature(parent, IOMMU_DEV_FEAT_IOPF))
ret = iommu_dev_enable_feature(parent, IOMMU_DEV_FEAT_IOPF);
if (ret) {
dev_err(parent, "failed to enable IOPF feature! ret = %pe\n", ERR_PTR(ret));
return flags;
}
if (iommu_dev_enable_feature(parent, IOMMU_DEV_FEAT_SVA)) {
ret = iommu_dev_enable_feature(parent, IOMMU_DEV_FEAT_SVA);
if (ret) {
dev_err(parent, "failed to enable SVA feature! ret = %pe\n", ERR_PTR(ret));
iommu_dev_disable_feature(parent, IOMMU_DEV_FEAT_IOPF);
return flags;
}