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PCI/P2PDMA: Fix a sleeping issue in a RCU read section
[ Upstream commit1e5c66afd4
] It is not allowed to sleep within a RCU read section, so use GFP_ATOMIC instead of GFP_KERNEL here. Link: https://lore.kernel.org/r/02d9ec4a10235def0e764ff1f5be881ba12e16e8.1704397858.git.christophe.jaillet@wanadoo.fr Fixes:ae21f835a5
("PCI/P2PDMA: Finish RCU conversion of pdev->p2pdma") Signed-off-by: Christophe JAILLET <christophe.jaillet@wanadoo.fr> Signed-off-by: Bjorn Helgaas <bhelgaas@google.com> Reviewed-by: Logan Gunthorpe <logang@deltatee.com> Signed-off-by: Sasha Levin <sashal@kernel.org>
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@ -661,7 +661,7 @@ calc_map_type_and_dist(struct pci_dev *provider, struct pci_dev *client,
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p2pdma = rcu_dereference(provider->p2pdma);
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p2pdma = rcu_dereference(provider->p2pdma);
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if (p2pdma)
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if (p2pdma)
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xa_store(&p2pdma->map_types, map_types_idx(client),
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xa_store(&p2pdma->map_types, map_types_idx(client),
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xa_mk_value(map_type), GFP_KERNEL);
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xa_mk_value(map_type), GFP_ATOMIC);
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rcu_read_unlock();
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rcu_read_unlock();
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return map_type;
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return map_type;
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}
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}
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