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From: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
To: Ikjoon Jang <ikjn@chromium.org>
Cc: linux-usb@vger.kernel.org,
	Chunfeng Yun <chunfeng.yun@mediatek.com>,
	linux-mediatek@lists.infradead.org,
	Matthias Brugger <matthias.bgg@gmail.com>,
	linux-kernel@vger.kernel.org,
	linux-arm-kernel@lists.infradead.org,
	Mathias Nyman <mathias.nyman@intel.com>
Subject: Re: [RFC PATCH] usb: xhci-mtk: handle bandwidth table rollover
Date: Mon, 9 Aug 2021 11:11:42 +0200	[thread overview]
Message-ID: <YRDxTodNNqtnpPpn@kroah.com> (raw)
In-Reply-To: <20210809165904.RFC.1.I5165a4a8da5cac23c9928b1ec3c3a1a7383b7c23@changeid>

On Mon, Aug 09, 2021 at 04:59:29PM +0800, Ikjoon Jang wrote:
> xhci-mtk has 64 slots for periodic bandwidth calculations and each
> slot represents byte budgets on a microframe. When an endpoint's
> allocation sits on the boundary of the table, byte budgets' slot
> should be rolled over but the current implementation doesn't.
> 
> This patch applies a 6 bits mask to the microframe index to handle
> its rollover 64 slots and prevent out-of-bounds array access.
> 
> Signed-off-by: Ikjoon Jang <ikjn@chromium.org>
> ---
> 
>  drivers/usb/host/xhci-mtk-sch.c | 79 +++++++++------------------------
>  drivers/usb/host/xhci-mtk.h     |  1 +
>  2 files changed, 23 insertions(+), 57 deletions(-)

Why is this "RFC"?  What needs to be addressed in this change before it
can be accepted?

thanks,

greg k-h

WARNING: multiple messages have this Message-ID
From: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
To: Ikjoon Jang <ikjn@chromium.org>
Cc: linux-usb@vger.kernel.org,
	Chunfeng Yun <chunfeng.yun@mediatek.com>,
	linux-mediatek@lists.infradead.org,
	Matthias Brugger <matthias.bgg@gmail.com>,
	linux-kernel@vger.kernel.org,
	linux-arm-kernel@lists.infradead.org,
	Mathias Nyman <mathias.nyman@intel.com>
Subject: Re: [RFC PATCH] usb: xhci-mtk: handle bandwidth table rollover
Date: Mon, 9 Aug 2021 11:11:42 +0200	[thread overview]
Message-ID: <YRDxTodNNqtnpPpn@kroah.com> (raw)
In-Reply-To: <20210809165904.RFC.1.I5165a4a8da5cac23c9928b1ec3c3a1a7383b7c23@changeid>

On Mon, Aug 09, 2021 at 04:59:29PM +0800, Ikjoon Jang wrote:
> xhci-mtk has 64 slots for periodic bandwidth calculations and each
> slot represents byte budgets on a microframe. When an endpoint's
> allocation sits on the boundary of the table, byte budgets' slot
> should be rolled over but the current implementation doesn't.
> 
> This patch applies a 6 bits mask to the microframe index to handle
> its rollover 64 slots and prevent out-of-bounds array access.
> 
> Signed-off-by: Ikjoon Jang <ikjn@chromium.org>
> ---
> 
>  drivers/usb/host/xhci-mtk-sch.c | 79 +++++++++------------------------
>  drivers/usb/host/xhci-mtk.h     |  1 +
>  2 files changed, 23 insertions(+), 57 deletions(-)

Why is this "RFC"?  What needs to be addressed in this change before it
can be accepted?

thanks,

greg k-h

_______________________________________________
Linux-mediatek mailing list
Linux-mediatek@lists.infradead.org
http://lists.infradead.org/mailman/listinfo/linux-mediatek

WARNING: multiple messages have this Message-ID
From: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
To: Ikjoon Jang <ikjn@chromium.org>
Cc: linux-usb@vger.kernel.org,
	Chunfeng Yun <chunfeng.yun@mediatek.com>,
	linux-mediatek@lists.infradead.org,
	Matthias Brugger <matthias.bgg@gmail.com>,
	linux-kernel@vger.kernel.org,
	linux-arm-kernel@lists.infradead.org,
	Mathias Nyman <mathias.nyman@intel.com>
Subject: Re: [RFC PATCH] usb: xhci-mtk: handle bandwidth table rollover
Date: Mon, 9 Aug 2021 11:11:42 +0200	[thread overview]
Message-ID: <YRDxTodNNqtnpPpn@kroah.com> (raw)
In-Reply-To: <20210809165904.RFC.1.I5165a4a8da5cac23c9928b1ec3c3a1a7383b7c23@changeid>

On Mon, Aug 09, 2021 at 04:59:29PM +0800, Ikjoon Jang wrote:
> xhci-mtk has 64 slots for periodic bandwidth calculations and each
> slot represents byte budgets on a microframe. When an endpoint's
> allocation sits on the boundary of the table, byte budgets' slot
> should be rolled over but the current implementation doesn't.
> 
> This patch applies a 6 bits mask to the microframe index to handle
> its rollover 64 slots and prevent out-of-bounds array access.
> 
> Signed-off-by: Ikjoon Jang <ikjn@chromium.org>
> ---
> 
>  drivers/usb/host/xhci-mtk-sch.c | 79 +++++++++------------------------
>  drivers/usb/host/xhci-mtk.h     |  1 +
>  2 files changed, 23 insertions(+), 57 deletions(-)

Why is this "RFC"?  What needs to be addressed in this change before it
can be accepted?

thanks,

greg k-h

_______________________________________________
linux-arm-kernel mailing list
linux-arm-kernel@lists.infradead.org
http://lists.infradead.org/mailman/listinfo/linux-arm-kernel

  reply	other threads:[~2021-08-09  9:11 UTC|newest]

Thread overview: 21+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2021-08-09  8:59 [RFC PATCH] usb: xhci-mtk: handle bandwidth table rollover Ikjoon Jang
2021-08-09  8:59 ` Ikjoon Jang
2021-08-09  8:59 ` Ikjoon Jang
2021-08-09  9:11 ` Greg Kroah-Hartman [this message]
2021-08-09  9:11   ` Greg Kroah-Hartman
2021-08-09  9:11   ` Greg Kroah-Hartman
2021-08-09  9:42   ` Ikjoon Jang
2021-08-09  9:42     ` Ikjoon Jang
2021-08-09  9:42     ` Ikjoon Jang
2021-08-11  9:01     ` Chunfeng Yun (云春峰)
2021-08-12  9:31       ` Ikjoon Jang
2021-08-12  9:31         ` Ikjoon Jang
2021-08-12  9:31         ` Ikjoon Jang
2021-08-12 11:49         ` Chunfeng Yun (云春峰)
2021-08-12 13:47           ` Ikjoon Jang
2021-08-12 13:47             ` Ikjoon Jang
2021-08-12 13:47             ` Ikjoon Jang
2021-08-18  2:43           ` Ikjoon Jang
2021-08-18  2:43             ` Ikjoon Jang
2021-08-18  2:43             ` Ikjoon Jang
2021-08-20  3:37             ` Chunfeng Yun (云春峰)

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