diff mbox

[3.19.y-ckt,153/251] of/address: use atomic allocation in pci_register_io_range()

Message ID 1437008972-9140-154-git-send-email-kamal@canonical.com
State New
Headers show

Commit Message

Kamal Mostafa July 16, 2015, 1:07 a.m. UTC 
3.19.8-ckt4 -stable review patch.  If anyone has any objections, please let me know.

------------------

From: Jingoo Han <jingoohan1@gmail.com>

commit 294240ffe784e951dc2ef070da04fa31ef6db3a0 upstream.

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 <jingoohan1@gmail.com>
Signed-off-by: Rob Herring <robh@kernel.org>
Signed-off-by: Kamal Mostafa <kamal@canonical.com>
---
 drivers/of/address.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)
diff mbox

Patch

diff --git a/drivers/of/address.c b/drivers/of/address.c
index 6906a3f..8bfda6a 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;