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Commit 85d2955e authored by Stanislaw Gruszka's avatar Stanislaw Gruszka Committed by Felix Fietkau
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mt76usb: allocate urb and sg as linear data 



Alloc sg table at the end of urb structure. This will increase
cache usage.

Signed-off-by: default avatarStanislaw Gruszka <sgruszka@redhat.com>
Signed-off-by: default avatarFelix Fietkau <nbd@nbd.name>
parent 7524c63f

drivers/net/wireless/mediatek/mt76/usb.c

+10 −10
Original line number Diff line number Diff line
@@ -336,19 +336,19 @@ mt76u_refill_rx(struct mt76_dev *dev, struct urb *urb, int nsgs, gfp_t gfp) 
static int

mt76u_urb_alloc(struct mt76_dev *dev, struct mt76_queue_entry *e)

{

	struct urb *urb;

	unsigned int size = sizeof(struct urb);



	urb = usb_alloc_urb(0, GFP_KERNEL);

	if (!urb)

		return -ENOMEM;

	e->urb = urb;

	if (dev->usb.sg_en)

		size += MT_SG_MAX_SIZE * sizeof(struct scatterlist);



	if (dev->usb.sg_en) {

		urb->sg = devm_kcalloc(dev->dev, MT_SG_MAX_SIZE,

				       sizeof(*urb->sg), GFP_KERNEL);

		if (!urb->sg)

	e->urb = kzalloc(size, GFP_KERNEL);

	if (!e->urb)

		return -ENOMEM;

	}



	usb_init_urb(e->urb);



	if (dev->usb.sg_en)

		e->urb->sg = (struct scatterlist *)(e->urb + 1);



	return 0;

}