diff options
| author | Thinh Nguyen <Thinh.Nguyen@synopsys.com> | 2021-03-09 05:16:50 +0300 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2021-03-23 15:21:24 +0300 |
| commit | 93f1d43c5767d70a1af89f54ef16a7d3e99af048 (patch) | |
| tree | c5c2321483de8dba430905bd13fd3576f8deef20 /drivers/usb | |
| parent | cdb651b6021ee091abc24e9fbd9774d318ab96a6 (diff) | |
| download | linux-93f1d43c5767d70a1af89f54ef16a7d3e99af048.tar.xz | |
usb: dwc3: gadget: Use max speed if unspecified
If the gadget driver doesn't specify a max_speed, then use the
controller's maximum supported speed as default. For DWC_usb32 IP, the
gadget's speed maybe limited to gen2x1 rate only if the driver's
max_speed is unknown. This scenario should not occur with the current
implementation since the default gadget driver's max_speed should always
be specified. However, to make the driver more robust and help with
readability, let's cover all the scenarios in __dwc3_gadget_set_speed().
Fixes: 450b9e9fabd8 ("usb: dwc3: gadget: Set speed only up to the max supported")
Cc: <stable@vger.kernel.org>
Signed-off-by: Thinh Nguyen <Thinh.Nguyen@synopsys.com>
Link: https://lore.kernel.org/r/55ac7001af73bfe9bc750c6446ef4ac8cf6f9313.1615254129.git.Thinh.Nguyen@synopsys.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'drivers/usb')
| -rw-r--r-- | drivers/usb/dwc3/gadget.c | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/drivers/usb/dwc3/gadget.c b/drivers/usb/dwc3/gadget.c index 006476a4737b..4c15c3fce303 100644 --- a/drivers/usb/dwc3/gadget.c +++ b/drivers/usb/dwc3/gadget.c @@ -2083,7 +2083,7 @@ static void __dwc3_gadget_set_speed(struct dwc3 *dwc) u32 reg; speed = dwc->gadget_max_speed; - if (speed > dwc->maximum_speed) + if (speed == USB_SPEED_UNKNOWN || speed > dwc->maximum_speed) speed = dwc->maximum_speed; if (speed == USB_SPEED_SUPER_PLUS && |