4.9-stable review patch. If anyone has any objections, please let me know.
------------------
From: Johan Hovold <jo...@kernel.org>
commit d81182ce30dbd497a1e7047d7fda2af040347790 upstream.
Flag the first and only port as removable while also leaving the
remaining bits (including the reserved bit zero) unset in accordance
with the specifications:
"Within a byte, if no port exists for a given location, the bit
field representing the port characteristics shall be 0."
Also add a comment marking the legacy PortPwrCtrlMask field.
Fixes: 1cd8fd2887e1 ("usb: gadget: dummy_hcd: add SuperSpeed support")
Fixes: 1da177e4c3f4 ("Linux-2.6.12-rc2")
Cc: Tatyana Brokhman <tlin...@codeaurora.org>
Signed-off-by: Johan Hovold <jo...@kernel.org>
Acked-by: Alan Stern <st...@rowland.harvard.edu>
Signed-off-by: Greg Kroah-Hartman <gre...@linuxfoundation.org>
---
drivers/usb/gadget/udc/dummy_hcd.c | 6 +++---
1 file changed, 3 insertions(+), 3 deletions(-)
--- a/drivers/usb/gadget/udc/dummy_hcd.c
+++ b/drivers/usb/gadget/udc/dummy_hcd.c
@@ -2009,7 +2009,7 @@ ss_hub_descriptor(struct usb_hub_descrip
HUB_CHAR_COMMON_OCPM);
desc->bNbrPorts = 1;
desc->u.ss.bHubHdrDecLat = 0x04; /* Worst case: 0.4 micro sec*/
- desc->u.ss.DeviceRemovable = 0xffff;
+ desc->u.ss.DeviceRemovable = 0;
}
static inline void hub_descriptor(struct usb_hub_descriptor *desc)
@@ -2021,8 +2021,8 @@ static inline void hub_descriptor(struct
HUB_CHAR_INDV_PORT_LPSM |
HUB_CHAR_COMMON_OCPM);
desc->bNbrPorts = 1;
- desc->u.hs.DeviceRemovable[0] = 0xff;
- desc->u.hs.DeviceRemovable[1] = 0xff;
+ desc->u.hs.DeviceRemovable[0] = 0;
+ desc->u.hs.DeviceRemovable[1] = 0xff; /* PortPwrCtrlMask */
}
static int dummy_hub_control(
