[PATCH] of/address: use atomic allocation in pci_register_io_range()

[Jingoo Han]

When kzalloc() is called under spin_lock(), GFP_ATOMIC should be
used to avoid sleeping allocation.
The call tree is:
  of_pci_range_to_resource()
    --> pci_register_io_range() <-- takes spin_lock(&io_range_lock);
       --> kzalloc()

Signed-off-by: Jingoo Han <jingooh...@gmail.com>
---
 drivers/of/address.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/of/address.c b/drivers/of/address.c
index 78a7dcb..65c3289 100644
--- a/drivers/of/address.c
+++ b/drivers/of/address.c
@@ -712,7 +712,7 @@ int __weak pci_register_io_range(phys_addr_t addr, 
resource_size_t size)
        }
 
        /* add the range to the list */
-       range = kzalloc(sizeof(*range), GFP_KERNEL);
+       range = kzalloc(sizeof(*range), GFP_ATOMIC);
        if (!range) {
                err = -ENOMEM;
                goto end_register;
-- 
1.9.1


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