From: <gregkh@linuxfoundation.org>
To: Jacky.Cao@sony.com, gregkh@linuxfoundation.org,
stable@vger.kernel.org, stern@rowland.harvard.edu
Subject: patch "USB: dummy-hcd: fix power budget for SuperSpeed mode" added to usb-linus
Date: Fri, 04 Oct 2019 11:04:12 +0200 [thread overview]
Message-ID: <1570179852116123@kroah.com> (raw)
This is a note to let you know that I've just added the patch titled
USB: dummy-hcd: fix power budget for SuperSpeed mode
to my usb git tree which can be found at
git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/usb.git
in the usb-linus branch.
The patch will show up in the next release of the linux-next tree
(usually sometime within the next 24 hours during the week.)
The patch will hopefully also be merged in Linus's tree for the
next -rc kernel release.
If you have any questions about this process, please let me know.
From 2636d49b64671d3d90ecc4daf971b58df3956519 Mon Sep 17 00:00:00 2001
From: "Jacky.Cao@sony.com" <Jacky.Cao@sony.com>
Date: Thu, 5 Sep 2019 04:11:57 +0000
Subject: USB: dummy-hcd: fix power budget for SuperSpeed mode
The power budget for SuperSpeed mode should be 900 mA
according to USB specification, so set the power budget
to 900mA for dummy_start_ss which is only used for
SuperSpeed mode.
If the max power consumption of SuperSpeed device is
larger than 500 mA, insufficient available bus power
error happens in usb_choose_configuration function
when the device connects to dummy hcd.
Signed-off-by: Jacky Cao <Jacky.Cao@sony.com>
Acked-by: Alan Stern <stern@rowland.harvard.edu>
Cc: stable <stable@vger.kernel.org>
Link: https://lore.kernel.org/r/16EA1F625E922C43B00B9D82250220500871CDE5@APYOKXMS108.ap.sony.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
---
drivers/usb/gadget/udc/dummy_hcd.c | 3 ++-
1 file changed, 2 insertions(+), 1 deletion(-)
diff --git a/drivers/usb/gadget/udc/dummy_hcd.c b/drivers/usb/gadget/udc/dummy_hcd.c
index 8414fac74493..3d499d93c083 100644
--- a/drivers/usb/gadget/udc/dummy_hcd.c
+++ b/drivers/usb/gadget/udc/dummy_hcd.c
@@ -48,6 +48,7 @@
#define DRIVER_VERSION "02 May 2005"
#define POWER_BUDGET 500 /* in mA; use 8 for low-power port testing */
+#define POWER_BUDGET_3 900 /* in mA */
static const char driver_name[] = "dummy_hcd";
static const char driver_desc[] = "USB Host+Gadget Emulator";
@@ -2432,7 +2433,7 @@ static int dummy_start_ss(struct dummy_hcd *dum_hcd)
dum_hcd->rh_state = DUMMY_RH_RUNNING;
dum_hcd->stream_en_ep = 0;
INIT_LIST_HEAD(&dum_hcd->urbp_list);
- dummy_hcd_to_hcd(dum_hcd)->power_budget = POWER_BUDGET;
+ dummy_hcd_to_hcd(dum_hcd)->power_budget = POWER_BUDGET_3;
dummy_hcd_to_hcd(dum_hcd)->state = HC_STATE_RUNNING;
dummy_hcd_to_hcd(dum_hcd)->uses_new_polling = 1;
#ifdef CONFIG_USB_OTG
--
2.23.0
reply other threads:[~2019-10-04 9:04 UTC|newest]
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