diff options
Diffstat (limited to 'target/linux/bcm27xx/patches-4.19/950-0263-dwc_otg-fix-bug-with-port_addr-assignment-for-single.patch')
-rw-r--r-- | target/linux/bcm27xx/patches-4.19/950-0263-dwc_otg-fix-bug-with-port_addr-assignment-for-single.patch | 28 |
1 files changed, 28 insertions, 0 deletions
diff --git a/target/linux/bcm27xx/patches-4.19/950-0263-dwc_otg-fix-bug-with-port_addr-assignment-for-single.patch b/target/linux/bcm27xx/patches-4.19/950-0263-dwc_otg-fix-bug-with-port_addr-assignment-for-single.patch new file mode 100644 index 0000000000..fd5f88ff03 --- /dev/null +++ b/target/linux/bcm27xx/patches-4.19/950-0263-dwc_otg-fix-bug-with-port_addr-assignment-for-single.patch @@ -0,0 +1,28 @@ +From 6e56da00afdf11416045213552514d10bab845cc Mon Sep 17 00:00:00 2001 +From: P33M <p33m@github.com> +Date: Wed, 16 Jan 2019 10:17:52 +0000 +Subject: [PATCH] dwc_otg: fix bug with port_addr assignment for + single-TT hubs + +See https://github.com/raspberrypi/linux/issues/2734 + +The "Hub Port" field in the split transaction packet was always set +to 1 for single-TT hubs. The majority of single-TT hub products +apparently ignore this field and broadcast to all downstream enabled +ports, which masked the issue. A subset of hub devices apparently +need the port number to be exact or split transactions will fail. +--- + drivers/usb/host/dwc_otg/dwc_otg_hcd_linux.c | 2 +- + 1 file changed, 1 insertion(+), 1 deletion(-) + +--- a/drivers/usb/host/dwc_otg/dwc_otg_hcd_linux.c ++++ b/drivers/usb/host/dwc_otg/dwc_otg_hcd_linux.c +@@ -232,7 +232,7 @@ static int _hub_info(dwc_otg_hcd_t * hcd + else + *hub_addr = urb->dev->tt->hub->devnum; + } +- *port_addr = urb->dev->tt->multi ? urb->dev->ttport : 1; ++ *port_addr = urb->dev->ttport; + } else { + *hub_addr = 0; + *port_addr = urb->dev->ttport; |