2018-07-27 02:40:20

by Jia-Ju Bai

Subject: [PATCH] isdn: mISDN: hfcpci: Replace GFP_ATOMIC with GFP_KERNEL in hfc_probe()

hfc_probe() is never called in atomic context.
It calls kzalloc() with GFP_ATOMIC, which is not necessary.
GFP_ATOMIC can be replaced with GFP_KERNEL.

This is found by a static analysis tool named DCNS written by myself.

Signed-off-by: Jia-Ju Bai <[email protected]>
---
drivers/isdn/hardware/mISDN/hfcpci.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/isdn/hardware/mISDN/hfcpci.c b/drivers/isdn/hardware/mISDN/hfcpci.c
index 34c93874af23..5a2e2455761f 100644
--- a/drivers/isdn/hardware/mISDN/hfcpci.c
+++ b/drivers/isdn/hardware/mISDN/hfcpci.c
@@ -2219,7 +2219,7 @@ hfc_probe(struct pci_dev *pdev, const struct pci_device_id *ent)
struct hfc_pci *card;
struct _hfc_map *m = (struct _hfc_map *)ent->driver_data;

- card = kzalloc(sizeof(struct hfc_pci), GFP_ATOMIC);
+ card = kzalloc(sizeof(struct hfc_pci), GFP_KERNEL);
if (!card) {
printk(KERN_ERR "No kmem for HFC card\n");
return err;
--
2.17.0

2018-07-27 04:25:57

by David Miller

Subject: Re: [PATCH] isdn: mISDN: hfcpci: Replace GFP_ATOMIC with GFP_KERNEL in hfc_probe()

From: Jia-Ju Bai <[email protected]>
Date: Fri, 27 Jul 2018 10:39:06 +0800

> hfc_probe() is never called in atomic context.
> It calls kzalloc() with GFP_ATOMIC, which is not necessary.
> GFP_ATOMIC can be replaced with GFP_KERNEL.
>
> This is found by a static analysis tool named DCNS written by myself.
>
> Signed-off-by: Jia-Ju Bai <[email protected]>

Applied.