Alloc sg table at the end of urb structure. This will increase cache usage.
Signed-off-by: Stanislaw Gruszka <[email protected]> --- drivers/net/wireless/mediatek/mt76/usb.c | 20 ++++++++++---------- 1 file changed, 10 insertions(+), 10 deletions(-) diff --git a/drivers/net/wireless/mediatek/mt76/usb.c b/drivers/net/wireless/mediatek/mt76/usb.c index 0ae69c2fedaf..a80d6abee748 100644 --- a/drivers/net/wireless/mediatek/mt76/usb.c +++ b/drivers/net/wireless/mediatek/mt76/usb.c @@ -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); + + if (dev->usb.sg_en) + size += MT_SG_MAX_SIZE * sizeof(struct scatterlist); - urb = usb_alloc_urb(0, GFP_KERNEL); - if (!urb) + 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; } -- 2.20.1
