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From: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
To: linux-kernel@vger.kernel.org
Cc: Greg Kroah-Hartman <gregkh@linuxfoundation.org>,
	stable@vger.kernel.org, Chunfeng Yun <chunfeng.yun@mediatek.com>,
	Sasha Levin <sashal@kernel.org>
Subject: [PATCH 4.19 17/21] usb: mtu3: fix interval value for intr and isoc
Date: Mon, 10 Jan 2022 08:23:18 +0100	[thread overview]
Message-ID: <20220110071814.517246143@linuxfoundation.org> (raw)
In-Reply-To: <20220110071813.967414697@linuxfoundation.org>

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
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 07a6ee8db6123..9f0c949820bf7 100644
--- a/drivers/usb/mtu3/mtu3_gadget.c
+++ b/drivers/usb/mtu3/mtu3_gadget.c
@@ -82,7 +82,7 @@ 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;
 		}
@@ -94,7 +94,7 @@ 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




  parent reply	other threads:[~2022-01-10  7:30 UTC|newest]

Thread overview: 30+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2022-01-10  7:23 [PATCH 4.19 00/21] 4.19.225-rc1 review Greg Kroah-Hartman
2022-01-10  7:23 ` [PATCH 4.19 01/21] tracing: Fix check for trace_percpu_buffer validity in get_trace_buf() Greg Kroah-Hartman
2022-01-10  7:23 ` [PATCH 4.19 02/21] tracing: Tag trace_percpu_buffer as a percpu pointer Greg Kroah-Hartman
2022-01-10  7:23 ` [PATCH 4.19 03/21] ieee802154: atusb: fix uninit value in atusb_set_extended_addr Greg Kroah-Hartman
2022-01-10  7:23 ` [PATCH 4.19 04/21] RDMA/core: Dont infoleak GRH fields Greg Kroah-Hartman
2022-01-10  7:23 ` [PATCH 4.19 05/21] mac80211: initialize variable have_higher_than_11mbit Greg Kroah-Hartman
2022-01-10  7:23 ` [PATCH 4.19 06/21] i40e: fix use-after-free in i40e_sync_filters_subtask() Greg Kroah-Hartman
2022-01-10 10:10   ` Pavel Machek
2022-01-10  7:23 ` [PATCH 4.19 07/21] i40e: Fix incorrect netdevs real number of RX/TX queues Greg Kroah-Hartman
2022-01-10  7:23 ` [PATCH 4.19 08/21] ipv6: Check attribute length for RTA_GATEWAY in multipath route Greg Kroah-Hartman
2022-01-10  7:23 ` [PATCH 4.19 09/21] ipv6: Check attribute length for RTA_GATEWAY when deleting " Greg Kroah-Hartman
2022-01-10  7:23 ` [PATCH 4.19 10/21] sch_qfq: prevent shift-out-of-bounds in qfq_init_qdisc Greg Kroah-Hartman
2022-01-10  7:23 ` [PATCH 4.19 11/21] xfs: map unwritten blocks in XFS_IOC_{ALLOC,FREE}SP just like fallocate Greg Kroah-Hartman
2022-01-10  7:23 ` [PATCH 4.19 12/21] power: reset: ltc2952: Fix use of floating point literals Greg Kroah-Hartman
2022-01-10  7:23 ` [PATCH 4.19 13/21] rndis_host: support Hytera digital radios Greg Kroah-Hartman
2022-01-10  7:23 ` [PATCH 4.19 14/21] phonet: refcount leak in pep_sock_accep Greg Kroah-Hartman
2022-01-10  7:23 ` [PATCH 4.19 15/21] ipv6: Continue processing multipath route even if gateway attribute is invalid Greg Kroah-Hartman
2022-01-10  7:23 ` [PATCH 4.19 16/21] ipv6: Do cleanup if attribute validation fails in multipath route Greg Kroah-Hartman
2022-01-10  7:23 ` Greg Kroah-Hartman [this message]
2022-01-10  7:23 ` [PATCH 4.19 18/21] scsi: libiscsi: Fix UAF in iscsi_conn_get_param()/iscsi_conn_teardown() Greg Kroah-Hartman
2022-01-10  7:23 ` [PATCH 4.19 19/21] ip6_vti: initialize __ip6_tnl_parm struct in vti6_siocdevprivate Greg Kroah-Hartman
2022-01-10  7:23 ` [PATCH 4.19 20/21] net: udp: fix alignment problem in udp4_seq_show() Greg Kroah-Hartman
2022-01-10  7:23 ` [PATCH 4.19 21/21] mISDN: change function names to avoid conflicts Greg Kroah-Hartman
2022-01-10 11:49 ` [PATCH 4.19 00/21] 4.19.225-rc1 review Jon Hunter
2022-01-10 22:59 ` Shuah Khan
2022-01-10 23:49 ` Guenter Roeck
2022-01-11  0:49 ` Samuel Zou
2022-01-11  5:53 ` Naresh Kamboju
2022-01-11 11:35 ` Pavel Machek
2022-01-11 12:35 ` Sudip Mukherjee

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