On Wed, Jun 12, 2024 at 10:07:33AM +0800, Jeremy Kerr wrote:
> In the aspeed UDC setup, we configure the UDC hardware with the assigned
> USB device address.
>
> However, we have an off-by-one in the bitmask, so we're only setting the
> lower 6 bits of the address (USB addresses being 7 bits, and the
> hardware bitmask being bits 0:6).
>
> This means that device enumeration fails if the assigned address is
> greater than 64:
>
> [ 344.607255] usb 1-1: new high-speed USB device number 63 using ehci-platform
> [ 344.808459] usb 1-1: New USB device found, idVendor=cc00, idProduct=cc00, bcdDevice= 6.10
> [ 344.817684] usb 1-1: New USB device strings: Mfr=1, Product=2, SerialNumber=3
> [ 344.825671] usb 1-1: Product: Test device
> [ 344.831075] usb 1-1: Manufacturer: Test vendor
> [ 344.836335] usb 1-1: SerialNumber: 00
> [ 349.917181] usb 1-1: USB disconnect, device number 63
> [ 352.036775] usb 1-1: new high-speed USB device number 64 using ehci-platform
> [ 352.249432] usb 1-1: device descriptor read/all, error -71
> [ 352.696740] usb 1-1: new high-speed USB device number 65 using ehci-platform
> [ 352.909431] usb 1-1: device descriptor read/all, error -71
>
> Use the correct mask of 0x7f (rather than 0x3f), and generate this
> through the GENMASK macro, so we have numbers that correspond exactly
> to the hardware register definition.
>
> Fixes: 055276c13205 ("usb: gadget: add Aspeed ast2600 udc driver")
> Signed-off-by: Jeremy Kerr <jk@xxxxxxxxxxxxxxxxxxxx>
> ---
> drivers/usb/gadget/udc/aspeed_udc.c | 4 ++--
> 1 file changed, 2 insertions(+), 2 deletions(-)
>
> diff --git a/drivers/usb/gadget/udc/aspeed_udc.c b/drivers/usb/gadget/udc/aspeed_udc.c
> index 3916c8e2ba01..821a6ab5da56 100644
> --- a/drivers/usb/gadget/udc/aspeed_udc.c
> +++ b/drivers/usb/gadget/udc/aspeed_udc.c
> @@ -66,8 +66,8 @@
> #define USB_UPSTREAM_EN BIT(0)
>
> /* Main config reg */
> -#define UDC_CFG_SET_ADDR(x) ((x) & 0x3f)
> -#define UDC_CFG_ADDR_MASK (0x3f)
> +#define UDC_CFG_SET_ADDR(x) ((x) & UDC_CFG_ADDR_MASK)
> +#define UDC_CFG_ADDR_MASK GENMASK(6, 0)
>
> /* Interrupt ctrl & status reg */
> #define UDC_IRQ_EP_POOL_NAK BIT(17)
>
> ---
> base-commit: 32f88d65f01bf6f45476d7edbe675e44fb9e1d58
> change-id: 20240611-aspeed-udc-07dcde062ccf
>
> Best regards,
> --
> Jeremy Kerr <jk@xxxxxxxxxxxxxxxxxxxx>
>
>
Hi,
This is the friendly patch-bot of Greg Kroah-Hartman. You have sent him
a patch that has triggered this response. He used to manually respond
to these common problems, but in order to save his sanity (he kept
writing the same thing over and over, yet to different people), I was
created. Hopefully you will not take offence and will fix the problem
in your patch and resubmit it so that it can be accepted into the Linux
kernel tree.
You are receiving this message because of the following common error(s)
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thanks,
greg k-h's patch email bot
