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mt76usb: allocate urb and sg as linear data

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

Signed-off-by: Stanislaw Gruszka <[email protected]>
This commit is contained in:
Stanislaw Gruszka
2019-03-24 08:24:42 +01:00
committed by Felix Fietkau
parent 4d4d73a796
commit 57309c7e94
1 changed files with 10 additions and 10 deletions
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usb.c
+10 -10
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@@ -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)
if (dev->usb.sg_en)
size += MT_SG_MAX_SIZE * sizeof(struct scatterlist);
e->urb = kzalloc(size, GFP_KERNEL);
if (!e->urb)
return -ENOMEM;
e->urb = urb;
if (dev->usb.sg_en) {
urb->sg = devm_kcalloc(dev->dev, MT_SG_MAX_SIZE,
sizeof(*urb->sg), GFP_KERNEL);
if (!urb->sg)
return -ENOMEM;
}
usb_init_urb(e->urb);
if (dev->usb.sg_en)
e->urb->sg = (struct scatterlist *)(e->urb + 1);
return 0;
}