From: Oliver Neukum <oneukum@suse.com>
To: Jonathan Bell <jonathan@raspberrypi.org>, linux-usb@vger.kernel.org
Cc: Minas Harutyunyan <hminas@synopsys.com>
Subject: Re: dwc2 / Raspberry Pi - hardware bug for small transfers results in memory corruption
Date: Thu, 15 Aug 2019 12:55:30 +0200 [thread overview]
Message-ID: <1565866530.5780.4.camel@suse.com> (raw)
In-Reply-To: <CAPHs_J+G0jR5dMg1gVD0z60Zf4oZBikx6P9+B99-TA6m29DWGA@mail.gmail.com>
Am Mittwoch, den 14.08.2019, 16:59 +0100 schrieb Jonathan Bell:
> As reported by one of our users here:
> https://github.com/raspberrypi/linux/issues/3148
>
> There is a bug when the dwc2 core receives USB data packets that are
> between 1 and 4 bytes in length - 4 bytes are always written to memory
> where the non-packet bytes are garbage.
Hi,
in which function does that happen? If your buffer cannot handle 4
bytes I cannot see how it copes with teh DMA rules.
Regards
Oliver
next prev parent reply other threads:[~2019-08-15 10:55 UTC|newest]
Thread overview: 9+ messages / expand[flat|nested] mbox.gz Atom feed top
2019-08-14 15:59 dwc2 / Raspberry Pi - hardware bug for small transfers results in memory corruption Jonathan Bell
2019-08-15 10:55 ` Oliver Neukum [this message]
2019-08-15 11:41 ` Jonathan Bell
2019-08-15 14:37 ` Alan Stern
2019-08-15 14:52 ` Oliver Neukum
2019-08-16 22:18 ` Jonathan Bell
2019-08-19 11:01 ` Oliver Neukum
2019-08-15 12:51 ` Lars Melin
2019-08-15 12:54 ` Jonathan Bell
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