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usb: mtu3: fix the wrong HS mult value 

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: 4d79e042ed ("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@mediatek.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Chunfeng Yun 2021-08-13 14:30:49 +08:00 committed by Greg Kroah-Hartman
parent c3ffd35014
commit e00d39ca92
1 changed files with 2 additions and 4 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

6
drivers/usb/mtu3/mtu3_gadget.c
View File

@ -72,14 +72,12 @@ static int mtu3_ep_enable(struct mtu3_ep *mep)
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:
@ -100,7 +98,7 @@ static int mtu3_ep_enable(struct mtu3_ep *mep)
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: