Dong Jia Shi 5c1cfb1c39
vfio: ccw: refactor and improve pfn_array_alloc_pin() ...
This refactors pfn_array_alloc_pin() and also improves it by adding
defensive code in error handling so that calling pfn_array_unpin_free()
after error return won't lead to problem. This mainly does:
1. Merge pfn_array_pin() into pfn_array_alloc_pin(), since there is no
other user of pfn_array_pin(). As a result, also remove kernel-doc
for pfn_array_pin() and add/update kernel-doc for pfn_array_alloc_pin()
and struct pfn_array.
2. For a vfio_pin_pages() failure, set pa->pa_nr to zero to indicate
zero pages were pinned.
3. Set pa->pa_iova_pfn to NULL right after it was freed.
Suggested-by: Pierre Morel <pmorel@linux.ibm.com >
Signed-off-by: Dong Jia Shi <bjsdjshi@linux.ibm.com >
Message-Id: <20180523025645.8978-3-bjsdjshi@linux.ibm.com >
Signed-off-by: Cornelia Huck <cohuck@redhat.com >
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5c1cfb1c39