From: Jason Gunthorpe <jgg@nvidia.com>
To: Baolu Lu <baolu.lu@linux.intel.com>
Cc: iommu@lists.linux.dev, Kevin Tian <kevin.tian@intel.com>,
linux-kselftest@vger.kernel.org, kvm@vger.kernel.org,
Nicolin Chen <nicolinc@nvidia.com>, Yi Liu <yi.l.liu@intel.com>
Subject: Re: [PATCH 09/14] iommufd: Add iommufd_device_replace()
Date: Mon, 27 Feb 2023 09:58:27 -0400 [thread overview]
Message-ID: <Y/y3A4LJqunT0ZwS@nvidia.com> (raw)
In-Reply-To: <cdbc3707-d326-26d4-3adc-ff2ed80aa2ba@linux.intel.com>
On Sun, Feb 26, 2023 at 11:01:59AM +0800, Baolu Lu wrote:
> On 2/25/23 8:27 AM, Jason Gunthorpe wrote:
> > @@ -437,25 +517,77 @@ int iommufd_device_attach(struct iommufd_device *idev, u32 *pt_id)
> > struct iommufd_ioas *ioas =
> > container_of(pt_obj, struct iommufd_ioas, obj);
> > - rc = iommufd_device_auto_get_domain(idev, ioas, pt_id);
> > - if (rc)
> > + destroy_hwpt = iommufd_device_auto_get_domain(idev, ioas, pt_id,
> > + do_attach);
> > + if (IS_ERR(destroy_hwpt))
> > goto out_put_pt_obj;
> > break;
> > }
> > default:
> > - rc = -EINVAL;
> > + destroy_hwpt = ERR_PTR(-EINVAL);
> > goto out_put_pt_obj;
> > }
> > + iommufd_put_object(pt_obj);
> > - refcount_inc(&idev->obj.users);
> > - rc = 0;
> > + /* This destruction has to be after we unlock everything */
> > + if (destroy_hwpt)
>
> Should this be
>
> if (!IS_ERR_OR_NULL(destroy_hwpt))
>
> ?
Never use IS_ERR_OR_NULL ..
What am I missing? all the flows that could possibly have err_ptr here
do goto_out_put_pt_obj ?
Jason
next prev parent reply other threads:[~2023-02-27 13:58 UTC|newest]
Thread overview: 64+ messages / expand[flat|nested] mbox.gz Atom feed top
2023-02-25 0:27 [PATCH 00/14] Add iommufd physical device operations for replace and alloc hwpt Jason Gunthorpe
2023-02-25 0:27 ` [PATCH 01/14] iommufd: Move isolated msi enforcement to iommufd_device_bind() Jason Gunthorpe
2023-03-02 7:45 ` Tian, Kevin
2023-02-25 0:27 ` [PATCH 02/14] iommufd: Add iommufd_group Jason Gunthorpe
2023-03-02 7:55 ` Tian, Kevin
2023-03-02 12:51 ` Jason Gunthorpe
2023-03-03 2:13 ` Tian, Kevin
2023-03-06 19:16 ` Jason Gunthorpe
2023-03-07 2:32 ` Tian, Kevin
2023-02-25 0:27 ` [PATCH 03/14] iommufd: Replace the hwpt->devices list with iommufd_group Jason Gunthorpe
2023-03-02 8:01 ` Tian, Kevin
2023-03-06 20:22 ` Jason Gunthorpe
2023-03-07 2:38 ` Tian, Kevin
2023-03-07 13:53 ` Jason Gunthorpe
2023-03-08 7:29 ` Tian, Kevin
2023-03-08 19:00 ` Jason Gunthorpe
2023-02-25 0:27 ` [PATCH 04/14] iommufd: Use the iommufd_group to avoid duplicate reserved groups and msi setup Jason Gunthorpe
2023-03-02 8:06 ` Tian, Kevin
2023-03-02 12:55 ` Jason Gunthorpe
2023-03-03 2:16 ` Tian, Kevin
2023-02-25 0:27 ` [PATCH 05/14] iommufd: Make sw_msi_start a group global Jason Gunthorpe
2023-03-02 8:09 ` Tian, Kevin
2023-03-06 20:27 ` Jason Gunthorpe
2023-02-25 0:27 ` [PATCH 06/14] iommufd: Move putting a hwpt to a helper function Jason Gunthorpe
2023-03-02 8:12 ` Tian, Kevin
2023-03-06 20:29 ` Jason Gunthorpe
2023-02-25 0:27 ` [PATCH 07/14] iommufd: Add enforced_cache_coherency to iommufd_hw_pagetable_alloc() Jason Gunthorpe
2023-03-02 8:14 ` Tian, Kevin
2023-02-25 0:27 ` [PATCH 08/14] iommu: Introduce a new iommu_group_replace_domain() API Jason Gunthorpe
2023-03-02 8:16 ` Tian, Kevin
2023-02-25 0:27 ` [PATCH 09/14] iommufd: Add iommufd_device_replace() Jason Gunthorpe
2023-02-26 3:01 ` Baolu Lu
2023-02-27 13:58 ` Jason Gunthorpe [this message]
2023-02-28 1:50 ` Baolu Lu
2023-02-28 13:51 ` Jason Gunthorpe
2023-03-01 1:55 ` Baolu Lu
2023-02-26 3:13 ` Baolu Lu
2023-02-27 14:00 ` Jason Gunthorpe
2023-02-28 2:10 ` Baolu Lu
2023-02-28 13:52 ` Jason Gunthorpe
2023-03-01 2:23 ` Baolu Lu
2023-03-02 8:20 ` Tian, Kevin
2023-03-06 20:44 ` Jason Gunthorpe
2023-03-07 2:42 ` Tian, Kevin
2023-03-07 13:54 ` Jason Gunthorpe
2023-02-25 0:27 ` [PATCH 10/14] iommufd: Make destroy_rwsem use a lock class per object type Jason Gunthorpe
2023-02-25 0:27 ` [PATCH 11/14] iommufd/selftest: Test iommufd_device_replace() Jason Gunthorpe
2023-02-25 0:27 ` [PATCH 12/14] iommufd: Add IOMMU_HWPT_ALLOC Jason Gunthorpe
2023-03-06 1:42 ` Nicolin Chen
2023-03-06 20:31 ` Jason Gunthorpe
2023-03-17 3:02 ` Tian, Kevin
2023-03-17 4:02 ` Nicolin Chen
2023-03-17 10:20 ` Tian, Kevin
2023-03-21 17:16 ` Jason Gunthorpe
2023-02-25 0:27 ` [PATCH 13/14] iommufd/selftest: Return the real idev id from selftest mock_domain Jason Gunthorpe
2023-02-25 0:27 ` [PATCH 14/14] iommufd/selftest: Add a selftest for IOMMU_HWPT_ALLOC Jason Gunthorpe
2023-02-26 19:29 ` Nicolin Chen
2023-02-27 15:02 ` Jason Gunthorpe
2023-02-28 0:17 ` Nicolin Chen
2023-03-07 8:42 ` [PATCH 00/14] Add iommufd physical device operations for replace and alloc hwpt Tian, Kevin
2023-03-07 12:46 ` Jason Gunthorpe
2023-03-08 2:08 ` Baolu Lu
2023-03-08 7:38 ` Tian, Kevin
2023-03-08 18:59 ` Jason Gunthorpe
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