From: Benjamin Herrenschmidt <benh@kernel.crashing.org>
To: Neal Liu <neal_liu@aspeedtech.com>,
Felipe Balbi <balbi@kernel.org>,
Greg Kroah-Hartman <gregkh@linuxfoundation.org>,
Joel Stanley <joel@jms.id.au>, Andrew Jeffery <andrew@aj.id.au>,
Cai Huoqing <caihuoqing@baidu.com>,
Tao Ren <rentao.bupt@gmail.com>,
Julia Lawall <julia.lawall@inria.fr>,
kernel test robot <lkp@intel.com>,
Sasha Levin <sashal@kernel.org>,
linux-usb@vger.kernel.org, linux-kernel@vger.kernel.org,
linux-arm-kernel@lists.infradead.org,
linux-aspeed@lists.ozlabs.org
Cc: BMC-SW@aspeedtech.com
Subject: Re: [PATCH 3/3] usb: aspeed-vhub: fix ep0 OUT ack received wrong length issue
Date: Tue, 30 Nov 2021 10:48:48 +1100 [thread overview]
Message-ID: <12cf11dc4326922ceb67ede7b63a53fe1840b6fd.camel@kernel.crashing.org> (raw)
In-Reply-To: <20211126110954.2677627-4-neal_liu@aspeedtech.com>
On Fri, 2021-11-26 at 19:09 +0800, Neal Liu wrote:
>
> diff --git a/drivers/usb/gadget/udc/aspeed-vhub/ep0.c
> b/drivers/usb/gadget/udc/aspeed-vhub/ep0.c
> index 74ea36c19b1e..bea9cbb191a2 100644
> --- a/drivers/usb/gadget/udc/aspeed-vhub/ep0.c
> +++ b/drivers/usb/gadget/udc/aspeed-vhub/ep0.c
> @@ -251,6 +251,13 @@ static void ast_vhub_ep0_do_receive(struct
> ast_vhub_ep *ep, struct ast_vhub_req
> len = remain;
> rc = -EOVERFLOW;
> }
> +
> + /* HW return wrong data len */
> + if (len < ep->ep.maxpacket && len != remain) {
> + EPDBG(ep, "using expected data len instead\n");
> + len = remain;
> + }
> +
Wow, that is a nasty hw bug ! Patch looks good, I had to swap some of
that logic back into my brain but it looks like it won't break any
normal case :-)
Acked-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Cheers,
Ben.
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next prev parent reply other threads:[~2021-11-29 23:53 UTC|newest]
Thread overview: 14+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-11-26 11:09 [PATCH 0/3] Refactor Aspeed USB vhub driver Neal Liu
2021-11-26 11:09 ` [PATCH 1/3] usb: aspeed-vhub: add qualifier descriptor Neal Liu
2021-11-29 23:40 ` Benjamin Herrenschmidt
2021-11-30 9:30 ` Neal Liu
2021-11-26 11:09 ` [PATCH 2/3] usb: aspeed-vhub: support remote wakeup feature Neal Liu
2021-11-29 23:45 ` Benjamin Herrenschmidt
2021-11-30 9:47 ` Neal Liu
2021-11-30 23:37 ` Benjamin Herrenschmidt
2021-12-02 3:03 ` Neal Liu
2021-12-02 5:34 ` Neal Liu
2021-12-06 0:08 ` Benjamin Herrenschmidt
2021-11-26 11:09 ` [PATCH 3/3] usb: aspeed-vhub: fix ep0 OUT ack received wrong length issue Neal Liu
2021-11-29 23:48 ` Benjamin Herrenschmidt [this message]
2021-11-30 9:49 ` Neal Liu
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