[PATCH -next] PCI: Use GFP_ATOMIC in resource_alignment_store()

[YueHaibing]

When allocating memory, the GFP_KERNEL cannot be used during the
spin_lock period. It may cause scheduling when holding spin_lock.

Fixes: f13755318675 ("PCI: Move pci_[get|set]_resource_alignment_param() into their callers")
Signed-off-by: YueHaibing <yuehaibing@xxxxxxxxxx>
---
 drivers/pci/pci.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/pci/pci.c b/drivers/pci/pci.c
index 484e35349565..0b5fc6736f3f 100644
--- a/drivers/pci/pci.c
+++ b/drivers/pci/pci.c
@@ -6148,7 +6148,7 @@ static ssize_t resource_alignment_store(struct bus_type *bus,
 	spin_lock(&resource_alignment_lock);
 
 	kfree(resource_alignment_param);
-	resource_alignment_param = kstrndup(buf, count, GFP_KERNEL);
+	resource_alignment_param = kstrndup(buf, count, GFP_ATOMIC);
 
 	spin_unlock(&resource_alignment_lock);