linux-kernel - Re: [PATCH 3/6] usb: cdnsp: fix the wrong mult value for HS isoc or intr

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Message-ID: <87mtpnyx3g.fsf@kernel.org>
Date:   Thu, 12 Aug 2021 09:51:03 +0300
From:   Felipe Balbi <balbi@...nel.org>
To:     Chunfeng Yun <chunfeng.yun@...iatek.com>
Cc:     Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        Pawel Laszczak <pawell@...ence.com>,
        Al Cooper <alcooperx@...il.com>,
        Thierry Reding <thierry.reding@...il.com>,
        Jonathan Hunter <jonathanh@...dia.com>,
        Matthias Brugger <matthias.bgg@...il.com>,
        Christophe JAILLET <christophe.jaillet@...adoo.fr>,
        Yang Yingliang <yangyingliang@...wei.com>,
        Rikard Falkeborn <rikard.falkeborn@...il.com>,
        linux-usb@...r.kernel.org, linux-kernel@...r.kernel.org,
        bcm-kernel-feedback-list@...adcom.com, linux-tegra@...r.kernel.org,
        linux-arm-kernel@...ts.infradead.org,
        linux-mediatek@...ts.infradead.org,
        Eddie Hung <eddie.hung@...iatek.com>
Subject: Re: [PATCH 3/6] usb: cdnsp: fix the wrong mult value for HS isoc or
 intr


Chunfeng Yun <chunfeng.yun@...iatek.com> writes:

> usb_endpoint_maxp() only returns the bit[10:0] of wMaxPacketSize
> of endpoint descriptor, not include bit[12:11] anymore, so use
> usb_endpoint_maxp_mult() instead.
>
> Signed-off-by: Chunfeng Yun <chunfeng.yun@...iatek.com>
> ---
>  drivers/usb/cdns3/cdnsp-mem.c | 2 +-
>  1 file changed, 1 insertion(+), 1 deletion(-)
>
> diff --git a/drivers/usb/cdns3/cdnsp-mem.c b/drivers/usb/cdns3/cdnsp-mem.c
> index a47948a1623f..ad9aee3f1e39 100644
> --- a/drivers/usb/cdns3/cdnsp-mem.c
> +++ b/drivers/usb/cdns3/cdnsp-mem.c
> @@ -882,7 +882,7 @@ static u32 cdnsp_get_endpoint_max_burst(struct usb_gadget *g,
>  	if (g->speed == USB_SPEED_HIGH &&
>  	    (usb_endpoint_xfer_isoc(pep->endpoint.desc) ||
>  	     usb_endpoint_xfer_int(pep->endpoint.desc)))
> -		return (usb_endpoint_maxp(pep->endpoint.desc) & 0x1800) >> 11;
> +		return usb_endpoint_maxp_mult(pep->endpoint.desc) - 1;

this looks like a bugfix. Do we need to Cc stable here?

In any case:

Acked-by: Felipe Balbi <balbi@...nel.org>

-- 
balbi