[PATCH AUTOSEL 5.4 1/6] usb: mtu3: fix interval value for intr and isoc
From: Sasha Levin <sashal@kernel.org>
Date: 2022-01-03 17:31:03
Also in:
linux-mediatek, linux-usb, lkml, stable
Subsystem:
mediatek usb3 drd ip driver, the rest, usb subsystem · Maintainers:
Chunfeng Yun, Linus Torvalds, Greg Kroah-Hartman
From: Chunfeng Yun <chunfeng.yun@mediatek.com> [ Upstream commit e3d4621c22f90c33321ae6a6baab60cdb8e5a77c ] Use the Interval value from isoc/intr endpoint descriptor, no need minus one. The original code doesn't cause transfer error for normal cases, but it may have side effect with respond time of ERDY or tPingTimeout. Signed-off-by: Chunfeng Yun <chunfeng.yun@mediatek.com> Link: https://lore.kernel.org/r/20211218095749.6250-1-chunfeng.yun@mediatek.com (local) Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org> Signed-off-by: Sasha Levin <sashal@kernel.org> --- drivers/usb/mtu3/mtu3_gadget.c | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-)
diff --git a/drivers/usb/mtu3/mtu3_gadget.c b/drivers/usb/mtu3/mtu3_gadget.c
index 619c4598e64ea..63f82026cca39 100644
--- a/drivers/usb/mtu3/mtu3_gadget.c
+++ b/drivers/usb/mtu3/mtu3_gadget.c@@ -85,7 +85,7 @@ static int mtu3_ep_enable(struct mtu3_ep *mep) if (usb_endpoint_xfer_int(desc) || usb_endpoint_xfer_isoc(desc)) { interval = desc->bInterval; - interval = clamp_val(interval, 1, 16) - 1; + interval = clamp_val(interval, 1, 16); if (usb_endpoint_xfer_isoc(desc) && comp_desc) mult = comp_desc->bmAttributes; }
@@ -97,7 +97,7 @@ static int mtu3_ep_enable(struct mtu3_ep *mep) if (usb_endpoint_xfer_isoc(desc) || usb_endpoint_xfer_int(desc)) { interval = desc->bInterval; - interval = clamp_val(interval, 1, 16) - 1; + interval = clamp_val(interval, 1, 16); mult = usb_endpoint_maxp_mult(desc) - 1; } break;
--
2.34.1
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