From: Lorenzo Bianconi Date: Tue, 12 Feb 2019 13:42:42 +0000 (+0100) Subject: mt76: usb: introduce disable_usb_sg parameter X-Git-Tag: Ubuntu-5.13.0-19.19~9093^2~131^2~58^2~7 X-Git-Url: https://git.proxmox.com/?a=commitdiff_plain;h=c2908a0dfd7ab13381f09fde636f1429d4bb5eaa;p=mirror_ubuntu-jammy-kernel.git mt76: usb: introduce disable_usb_sg parameter Add disable_usb_sg module parameter to disable scatter-gather on demand Signed-off-by: Lorenzo Bianconi Signed-off-by: Felix Fietkau --- diff --git a/drivers/net/wireless/mediatek/mt76/usb.c b/drivers/net/wireless/mediatek/mt76/usb.c index 0970a53d6ed5..c9f095c1f161 100644 --- a/drivers/net/wireless/mediatek/mt76/usb.c +++ b/drivers/net/wireless/mediatek/mt76/usb.c @@ -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)); }