Messages in this thread | | | From | "Tian, Kevin" <> | Subject | RE: [RFT][PATCH v2 1/9] vfio: Make vfio_unpin_pages() return void | Date | Thu, 7 Jul 2022 08:42:28 +0000 |
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> From: Nicolin Chen <nicolinc@nvidia.com> > Sent: Wednesday, July 6, 2022 2:28 PM > > There's only one caller that checks its return value with a WARN_ON_ONCE, > while all other callers do not check return value at all. So simplify the > API to return void by embedding similar WARN_ON_ONCEs.
While this change keeps the similar effect as before it leads to different policy for same type of errors between pin and unpin paths:
e.g.
vfio_unpin_pages(): if (WARN_ON_ONCE(!user_pfn || !npage || !vfio_assert_device_open(device))) return;
vfio_pin_pages(): if (!user_pfn || !phys_pfn || !npage || !vfio_assert_device_open(device)) return -EINVAL;
It sounds a bit weird when reading related code...
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