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authorAlex Williamson2005-04-25 13:14:36 -0700
committerTony Luck2005-04-25 13:14:36 -0700
commit5f6602a101993592b437b801c401443bec65d0cf (patch)
tree603ce367a349b9454a7f6b77953b3ecdf194ec68 /include
parentfde740e4dd4a05ca8957490d468fa9b2770f5bd6 (diff)
[IA64] sba_iommu bug fixes
This fixes a couple of bugs in the zx1/sx1000 sba_iommu. These are all pretty low likelihood of hitting. The first problem is a simple off by one, deep in the sba_alloc_range() error path. Surrounding that was a lock ordering problem that could have potentially deadlocked with the order the locks are grabbed in sba_unmap_single(). I moved the resource locking into sba_search_bitmap() to prevent this. Finally, there's a potential race between unmapping pdir entries and marking incoming DMA pages clean. If you see any oddities, please let me know, but I've tested it pretty thoroughly here. Tony, please apply. Thanks, BTW, many of the options in this driver not on by default are becoming more and more broken. I'll be working on some patches to clean them out, but I wanted to get this bug fix out first. Signed-off-by: Alex Williamson <alex.williamson@hp.com> Signed-off-by: Tony Luck <tony.luck@intel.com>
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