Date: Wed, 30 Jan 2008 09:09:53 -0700 (MST) From: "M. Warner Losh" <imp@bsdimp.com> To: raj@semihalf.com Cc: usb@FREEBSD.ORG Subject: Re: USB transfer coherency problems with write-allocate caches Message-ID: <20080130.090953.1708805666.imp@bsdimp.com> In-Reply-To: <47A095D5.2060801@semihalf.com> References: <47A095D5.2060801@semihalf.com>
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In message: <47A095D5.2060801@semihalf.com>
Rafal Jaworowski <raj@semihalf.com> writes:
: Doing a BUS_DMASYNC_PREREAD in usbd_start_transfer() fixes the problems, see
: this patch:
:
: http://people.freebsd.org/~raj/patches/misc/usbdi-bus_dma-fix.diff
:
: I'd like to hear comments from people knowing other architectures if they have
: any comments/objections.
I think that this fix looks good to me...
Warner
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