]> git.proxmox.com Git - mirror_ubuntu-eoan-kernel.git/commit
iommu/iova: Fix tracking of recently failed iova address
authorRobert Richter <rrichter@marvell.com>
Wed, 20 Mar 2019 18:57:23 +0000 (18:57 +0000)
committerJoerg Roedel <jroedel@suse.de>
Fri, 22 Mar 2019 11:01:58 +0000 (12:01 +0100)
commit80ef4464d5e27408685e609d389663aad46644b9
treeca955b70bf998d4b527e0e1f2de41c9ce50029a7
parent4e50ce03976fbc8ae995a000c4b10c737467beaa
iommu/iova: Fix tracking of recently failed iova address

If a 32 bit allocation request is too big to possibly succeed, it
early exits with a failure and then should never update max32_alloc_
size. This patch fixes current code, now the size is only updated if
the slow path failed while walking the tree. Without the fix the
allocation may enter the slow path again even if there was a failure
before of a request with the same or a smaller size.

Cc: <stable@vger.kernel.org> # 4.20+
Fixes: bee60e94a1e2 ("iommu/iova: Optimise attempts to allocate iova from 32bit address range")
Reviewed-by: Robin Murphy <robin.murphy@arm.com>
Signed-off-by: Robert Richter <rrichter@marvell.com>
Signed-off-by: Joerg Roedel <jroedel@suse.de>
drivers/iommu/iova.c