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From: Chunfeng Yun <chunfeng.yun@mediatek.com>
To: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Cc: Chunfeng Yun <chunfeng.yun@mediatek.com>,
	Matthias Brugger <matthias.bgg@gmail.com>,
	Felipe Balbi <felipe.balbi@linux.intel.com>,
	<linux-usb@vger.kernel.org>,
	<linux-arm-kernel@lists.infradead.org>,
	<linux-mediatek@lists.infradead.org>,
	<linux-kernel@vger.kernel.org>,
	"Eddie Hung" <eddie.hung@mediatek.com>
Subject: [PATCH v2 1/4] usb: mtu3: fix interval value for intr and isoc
Date: Sat, 18 Dec 2021 17:57:46 +0800	[thread overview]
Message-ID: <20211218095749.6250-1-chunfeng.yun@mediatek.com> (raw)

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>
---
v2: modify commit message to explain more about the issue to be fixed
---
 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 a9a65b4bbfed..c51be015345b 100644
--- a/drivers/usb/mtu3/mtu3_gadget.c
+++ b/drivers/usb/mtu3/mtu3_gadget.c
@@ -77,7 +77,7 @@ 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;
 		}
@@ -89,7 +89,7 @@ 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;
-- 
2.18.0


WARNING: multiple messages have this Message-ID (diff)
From: Chunfeng Yun <chunfeng.yun@mediatek.com>
To: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Cc: Chunfeng Yun <chunfeng.yun@mediatek.com>,
	Matthias Brugger <matthias.bgg@gmail.com>,
	Felipe Balbi <felipe.balbi@linux.intel.com>,
	<linux-usb@vger.kernel.org>,
	<linux-arm-kernel@lists.infradead.org>,
	<linux-mediatek@lists.infradead.org>,
	<linux-kernel@vger.kernel.org>,
	"Eddie Hung" <eddie.hung@mediatek.com>
Subject: [PATCH v2 1/4] usb: mtu3: fix interval value for intr and isoc
Date: Sat, 18 Dec 2021 17:57:46 +0800	[thread overview]
Message-ID: <20211218095749.6250-1-chunfeng.yun@mediatek.com> (raw)

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>
---
v2: modify commit message to explain more about the issue to be fixed
---
 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 a9a65b4bbfed..c51be015345b 100644
--- a/drivers/usb/mtu3/mtu3_gadget.c
+++ b/drivers/usb/mtu3/mtu3_gadget.c
@@ -77,7 +77,7 @@ 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;
 		}
@@ -89,7 +89,7 @@ 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;
-- 
2.18.0


_______________________________________________
Linux-mediatek mailing list
Linux-mediatek@lists.infradead.org
http://lists.infradead.org/mailman/listinfo/linux-mediatek

WARNING: multiple messages have this Message-ID (diff)
From: Chunfeng Yun <chunfeng.yun@mediatek.com>
To: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Cc: Chunfeng Yun <chunfeng.yun@mediatek.com>,
	Matthias Brugger <matthias.bgg@gmail.com>,
	Felipe Balbi <felipe.balbi@linux.intel.com>,
	<linux-usb@vger.kernel.org>,
	<linux-arm-kernel@lists.infradead.org>,
	<linux-mediatek@lists.infradead.org>,
	<linux-kernel@vger.kernel.org>,
	"Eddie Hung" <eddie.hung@mediatek.com>
Subject: [PATCH v2 1/4] usb: mtu3: fix interval value for intr and isoc
Date: Sat, 18 Dec 2021 17:57:46 +0800	[thread overview]
Message-ID: <20211218095749.6250-1-chunfeng.yun@mediatek.com> (raw)

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>
---
v2: modify commit message to explain more about the issue to be fixed
---
 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 a9a65b4bbfed..c51be015345b 100644
--- a/drivers/usb/mtu3/mtu3_gadget.c
+++ b/drivers/usb/mtu3/mtu3_gadget.c
@@ -77,7 +77,7 @@ 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;
 		}
@@ -89,7 +89,7 @@ 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;
-- 
2.18.0


_______________________________________________
linux-arm-kernel mailing list
linux-arm-kernel@lists.infradead.org
http://lists.infradead.org/mailman/listinfo/linux-arm-kernel

             reply	other threads:[~2021-12-18  9:58 UTC|newest]

Thread overview: 24+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2021-12-18  9:57 Chunfeng Yun [this message]
2021-12-18  9:57 ` [PATCH v2 1/4] usb: mtu3: fix interval value for intr and isoc Chunfeng Yun
2021-12-18  9:57 ` Chunfeng Yun
2021-12-18  9:57 ` [PATCH v2 2/4] usb: mtu3: add memory barrier before set GPD's HWO Chunfeng Yun
2021-12-18  9:57   ` Chunfeng Yun
2021-12-18  9:57   ` Chunfeng Yun
2021-12-18  9:57 ` [PATCH v2 3/4] usb: mtu3: fix list_head check warning Chunfeng Yun
2021-12-18  9:57   ` Chunfeng Yun
2021-12-18  9:57   ` Chunfeng Yun
2021-12-19 10:14   ` Sergei Shtylyov
2021-12-19 10:14     ` Sergei Shtylyov
2021-12-19 10:14     ` Sergei Shtylyov
2021-12-19 10:40     ` Greg Kroah-Hartman
2021-12-19 10:40       ` Greg Kroah-Hartman
2021-12-19 10:40       ` Greg Kroah-Hartman
2021-12-19 11:00       ` Sergei Shtylyov
2021-12-19 11:00         ` Sergei Shtylyov
2021-12-19 11:00         ` Sergei Shtylyov
2021-12-21  6:16         ` Chunfeng Yun
2021-12-21  6:16           ` Chunfeng Yun
2021-12-21  6:16           ` Chunfeng Yun
2021-12-18  9:57 ` [PATCH v2 4/4] usb: mtu3: set interval of FS intr and isoc endpoint Chunfeng Yun
2021-12-18  9:57   ` Chunfeng Yun
2021-12-18  9:57   ` Chunfeng Yun

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