29 lines
1.1 KiB
Diff
29 lines
1.1 KiB
Diff
From 0384e9ec7b5a3d8e6e2162ce8adf019d0f5c94cf Mon Sep 17 00:00:00 2001
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From: P33M <p33m@github.com>
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Date: Wed, 16 Jan 2019 10:17:52 +0000
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Subject: [PATCH 304/725] dwc_otg: fix bug with port_addr assignment for
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single-TT hubs
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See https://github.com/raspberrypi/linux/issues/2734
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The "Hub Port" field in the split transaction packet was always set
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to 1 for single-TT hubs. The majority of single-TT hub products
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apparently ignore this field and broadcast to all downstream enabled
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ports, which masked the issue. A subset of hub devices apparently
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need the port number to be exact or split transactions will fail.
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---
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drivers/usb/host/dwc_otg/dwc_otg_hcd_linux.c | 2 +-
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1 file changed, 1 insertion(+), 1 deletion(-)
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--- a/drivers/usb/host/dwc_otg/dwc_otg_hcd_linux.c
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+++ b/drivers/usb/host/dwc_otg/dwc_otg_hcd_linux.c
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@@ -232,7 +232,7 @@ static int _hub_info(dwc_otg_hcd_t * hcd
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else
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*hub_addr = urb->dev->tt->hub->devnum;
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}
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- *port_addr = urb->dev->tt->multi ? urb->dev->ttport : 1;
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+ *port_addr = urb->dev->ttport;
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} else {
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*hub_addr = 0;
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*port_addr = urb->dev->ttport;
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