From: Chunfeng Yun chunfeng.yun@mediatek.com
commit 44e4439d8f9f8d0e9da767d1f31e7c211081feca upstream.
usb_endpoint_maxp() returns actual max packet size, @mult will always be zero, fix it by using usb_endpoint_maxp_mult() instead to get mult.
Fixes: 4d79e042ed8b ("usb: mtu3: add support for usb3.1 IP") Cc: stable@vger.kernel.org Signed-off-by: Chunfeng Yun chunfeng.yun@mediatek.com Link: https://lore.kernel.org/r/1628836253-7432-3-git-send-email-chunfeng.yun@medi... Signed-off-by: Greg Kroah-Hartman gregkh@linuxfoundation.org --- drivers/usb/mtu3/mtu3_gadget.c | 6 ++---- 1 file changed, 2 insertions(+), 4 deletions(-)
--- a/drivers/usb/mtu3/mtu3_gadget.c +++ b/drivers/usb/mtu3/mtu3_gadget.c @@ -64,14 +64,12 @@ static int mtu3_ep_enable(struct mtu3_ep u32 interval = 0; u32 mult = 0; u32 burst = 0; - int max_packet; int ret;
desc = mep->desc; comp_desc = mep->comp_desc; mep->type = usb_endpoint_type(desc); - max_packet = usb_endpoint_maxp(desc); - mep->maxp = max_packet & GENMASK(10, 0); + mep->maxp = usb_endpoint_maxp(desc);
switch (mtu->g.speed) { case USB_SPEED_SUPER: @@ -92,7 +90,7 @@ static int mtu3_ep_enable(struct mtu3_ep usb_endpoint_xfer_int(desc)) { interval = desc->bInterval; interval = clamp_val(interval, 1, 16) - 1; - mult = (max_packet & GENMASK(12, 11)) >> 11; + mult = usb_endpoint_maxp_mult(desc) - 1; } break; default: