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    Subject[PATCH 5.3 033/112] USB: dummy-hcd: fix power budget for SuperSpeed mode
    Date
    From: Jacky.Cao@sony.com <Jacky.Cao@sony.com>

    commit 2636d49b64671d3d90ecc4daf971b58df3956519 upstream.

    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(-)

    --- 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_h
    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

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