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vfio/mbochs: Fix missing error unwind of mbochs_used_mbytes
[ Upstream commit de5494a ] Convert mbochs to use an atomic scheme for this like mtty was changed into. The atomic fixes various race conditions with probing. Add the missing error unwind. Also add the missing kfree of mdev_state->pages. Fixes: 681c161 ("vfio/mbochs: Convert to use vfio_register_group_dev()") Reported-by: Cornelia Huck <cohuck@redhat.com> Co-developed-by: Alex Williamson <alex.williamson@redhat.com> Reviewed-by: Christoph Hellwig <hch@lst.de> Signed-off-by: Jason Gunthorpe <jgg@nvidia.com> Reviewed-by: Cornelia Huck <cohuck@redhat.com> Link: https://lore.kernel.org/r/2-v4-9ea22c5e6afb+1adf-vfio_reflck_jgg@nvidia.com Signed-off-by: Alex Williamson <alex.williamson@redhat.com> Signed-off-by: Sasha Levin <sashal@kernel.org>
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