From: Chunfeng Yun <chunfeng.yun@mediatek.com>
To: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Cc: Felipe Balbi <felipe.balbi@linux.intel.com>,
Matthias Brugger <matthias.bgg@gmail.com>,
Chunfeng Yun <chunfeng.yun@mediatek.com>,
<linux-usb@vger.kernel.org>, <devicetree@vger.kernel.org>,
<linux-kernel@vger.kernel.org>,
<linux-arm-kernel@lists.infradead.org>,
<linux-mediatek@lists.infradead.org>
Subject: [PATCH] usb: devio: update max count of DPs per interval for ISOC
Date: Fri, 28 Dec 2018 18:27:44 +0800 [thread overview]
Message-ID: <1545992864-9530-1-git-send-email-chunfeng.yun@mediatek.com> (raw)
The host shall be able to accept and send up to 96 DPs for
devices operating at Gen 2 speed.
Signed-off-by: Chunfeng Yun <chunfeng.yun@mediatek.com>
---
drivers/usb/core/devio.c | 8 +++-----
1 file changed, 3 insertions(+), 5 deletions(-)
diff --git a/drivers/usb/core/devio.c b/drivers/usb/core/devio.c
index a75bc0b8a50f..82c16210e34c 100644
--- a/drivers/usb/core/devio.c
+++ b/drivers/usb/core/devio.c
@@ -1564,12 +1564,10 @@ static int proc_do_submiturb(struct usb_dev_state *ps, struct usbdevfs_urb *uurb
}
for (totlen = u = 0; u < number_of_packets; u++) {
/*
- * arbitrary limit need for USB 3.0
- * bMaxBurst (0~15 allowed, 1~16 packets)
- * bmAttributes (bit 1:0, mult 0~2, 1~3 packets)
- * sizemax: 1024 * 16 * 3 = 49152
+ * arbitrary limit need for USB 3.1 Gen2
+ * sizemax: 96 DPs at SSP, 96 * 1024 = 98304
*/
- if (isopkt[u].length > 49152) {
+ if (isopkt[u].length > 98304) {
ret = -EINVAL;
goto error;
}
--
2.19.1
next reply other threads:[~2018-12-28 10:28 UTC|newest]
Thread overview: 4+ messages / expand[flat|nested] mbox.gz Atom feed top
2018-12-28 10:27 Chunfeng Yun [this message]
2018-12-28 10:51 ` Greg Kroah-Hartman
2018-12-29 2:48 ` Chunfeng Yun
2018-12-29 12:49 ` Greg Kroah-Hartman
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