diff options
| author | Jacky.Cao@sony.com <Jacky.Cao@sony.com> | 2019-09-05 07:11:57 +0300 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2019-10-04 12:02:59 +0300 |
| commit | 2636d49b64671d3d90ecc4daf971b58df3956519 (patch) | |
| tree | 5969e108e65fdcb1d2e620c8af2c1e09990d9094 /drivers/usb/gadget/udc/dummy_hcd.c | |
| parent | 3f384d7c490374b2ae8f61a6c67f14deab77bab2 (diff) | |
| download | linux-2636d49b64671d3d90ecc4daf971b58df3956519.tar.xz | |
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>
Diffstat (limited to 'drivers/usb/gadget/udc/dummy_hcd.c')
| -rw-r--r-- | drivers/usb/gadget/udc/dummy_hcd.c | 3 |
1 files changed, 2 insertions, 1 deletions
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 |