Commit c2908a0d authored by Lorenzo Bianconi's avatar Lorenzo Bianconi Committed by Felix Fietkau
Browse files

mt76: usb: introduce disable_usb_sg parameter 



Add disable_usb_sg module parameter to disable scatter-gather on demand

Signed-off-by: default avatarLorenzo Bianconi <lorenzo@kernel.org>
Signed-off-by: default avatarFelix Fietkau <nbd@nbd.name>
parent f7522949

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

+5 −1
Original line number Diff line number Diff line
@@ -22,6 +22,10 @@ 
#define MT_VEND_REQ_MAX_RETRY	10

#define MT_VEND_REQ_TOUT_MS	300



static bool disable_usb_sg;

module_param_named(disable_usb_sg, disable_usb_sg, bool, 0644);

MODULE_PARM_DESC(disable_usb_sg, "Disable usb scatter-gather support");



/* should be called with usb_ctrl_mtx locked */

static int __mt76u_vendor_request(struct mt76_dev *dev, u8 req,

				  u8 req_type, u16 val, u16 offset,
@@ -246,7 +250,7 @@ static bool mt76u_check_sg(struct mt76_dev *dev) 
	struct usb_interface *intf = to_usb_interface(dev->dev);

	struct usb_device *udev = interface_to_usbdev(intf);



	return (udev->bus->sg_tablesize > 0 &&

	return (!disable_usb_sg && udev->bus->sg_tablesize > 0 &&

		(udev->bus->no_sg_constraint ||

		 udev->speed == USB_SPEED_WIRELESS));

}