From: "gregkh@linuxfoundation.org" <gregkh@linuxfoundation.org>
To: David Laight <David.Laight@aculab.com>
Cc: 'Amey Narkhede' <ameynarkhede03@gmail.com>,
"dan.carpenter@oracle.com" <dan.carpenter@oracle.com>,
"devel@driverdev.osuosl.org" <devel@driverdev.osuosl.org>,
"linux-kernel@vger.kernel.org" <linux-kernel@vger.kernel.org>,
"linux-usb@vger.kernel.org" <linux-usb@vger.kernel.org>
Subject: Re: [PATCH v4] staging: gdm724x: Fix DMA from stack
Date: Thu, 11 Feb 2021 14:52:12 +0100 [thread overview]
Message-ID: <YCU2jAameAtJ28+G@kroah.com> (raw)
In-Reply-To: <500e7317567548b48604ed9972062da2@AcuMS.aculab.com>
On Thu, Feb 11, 2021 at 01:28:41PM +0000, David Laight wrote:
> > Stack allocated buffers cannot be used for DMA
> > on all architectures so allocate hci_packet buffer
> > using kmalloc.
>
> I wonder if the usb stack ought/could support a short bounce
> buffer within the memory is already has to allocate?
No.
prev parent reply other threads:[~2021-02-11 13:55 UTC|newest]
Thread overview: 4+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-02-11 5:38 [PATCH v4] staging: gdm724x: Fix DMA from stack Amey Narkhede
2021-02-11 7:15 ` Dan Carpenter
2021-02-11 13:28 ` David Laight
2021-02-11 13:52 ` gregkh [this message]
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