From: Kai Ye <yekai13@huawei.com>
To: <gregkh@linuxfoundation.org>,
<linux-accelerators@lists.ozlabs.org>,
<linux-kernel@vger.kernel.org>, <linuxarm@huawei.com>,
<zhangfei.gao@linaro.org>, <wangzhou1@hisilicon.com>,
<yekai13@huawei.com>
Subject: [PATCH v2] uacce: add print information if not enable sva
Date: Wed, 9 Jun 2021 18:09:05 +0800 [thread overview]
Message-ID: <1623233345-8765-1-git-send-email-yekai13@huawei.com> (raw)
Add print information necessary if user not enable sva.
Signed-off-by: Kai Ye <yekai13@huawei.com>
changes v1->v2:
use %pe, ERR_PTR(ret) to descriptive error output
---
drivers/misc/uacce/uacce.c | 11 +++++++++--
1 file changed, 9 insertions(+), 2 deletions(-)
diff --git a/drivers/misc/uacce/uacce.c b/drivers/misc/uacce/uacce.c
index bae18ef0..488eeb2 100644
--- a/drivers/misc/uacce/uacce.c
+++ b/drivers/misc/uacce/uacce.c
@@ -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;
}
--
2.7.4
reply other threads:[~2021-06-09 10:09 UTC|newest]
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