PCI: hv: Replace GFP_ATOMIC with GFP_KERNEL in new_pcichild_device()

new_pcichild_device() is not called in atomic context.

The call chain ending up at new_pcichild_device() is:
[1] new_pcichild_device() <- pci_devices_present_work()
pci_devices_present_work() is only set in INIT_WORK().

Despite never getting called from atomic context,
new_pcichild_device() calls kzalloc with GFP_ATOMIC,
which waits busily for allocation.

GFP_ATOMIC is not necessary and can be replaced with GFP_KERNEL
to avoid busy waiting.

Signed-off-by: Jia-Ju Bai <baijiaju1990@gmail.com>
[lorenzo.pieralisi@arm.com: reworked commit log]
Signed-off-by: Lorenzo Pieralisi <lorenzo.pieralisi@arm.com>
Reviewed-by: Michael Kelley <mikelley@microsoft.com>

diff --git a/drivers/pci/controller/pci-hyperv.c b/drivers/pci/controller/pci-hyperv.c
index 6cc5036..ba1d4b5 100644 (file)
--- a/drivers/pci/controller/pci-hyperv.c
+++ b/drivers/pci/controller/pci-hyperv.c
@@ -1543,7 +1543,7 @@ static struct hv_pci_dev *new_pcichild_device(struct hv_pcibus_device *hbus,
        unsigned long flags;
        int ret;
 
-       hpdev = kzalloc(sizeof(*hpdev), GFP_ATOMIC);
+       hpdev = kzalloc(sizeof(*hpdev), GFP_KERNEL);
        if (!hpdev)
                return NULL;