Date: Mon, 29 Jun 2009 11:11:15 GMT From: Hans Petter Selasky <hselasky@FreeBSD.org> To: Perforce Change Reviews <perforce@FreeBSD.org> Subject: PERFORCE change 165387 for review Message-ID: <200906291111.n5TBBFrR000553@repoman.freebsd.org>
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http://perforce.freebsd.org/chv.cgi?CH=165387 Change 165387 by hselasky@hselasky_laptop001 on 2009/06/29 11:11:10 USB CORE: busdma improvement For single segment allocations the boundary field of the BUSDMA tag should be zero. Currently all single segment allocations are less than or equal to 4096 bytes, so the limit does not kick in. If any single segment USB allocations would be greater than 4K, then it would be a problem. Affected files ... .. //depot/projects/usb/src/sys/dev/usb/usb_busdma.c#13 edit Differences ... ==== //depot/projects/usb/src/sys/dev/usb/usb_busdma.c#13 (text+ko) ==== @@ -359,7 +359,8 @@ if (bus_dma_tag_create ( /* parent */ udt->tag_parent->tag, /* alignment */ align, - /* boundary */ USB_PAGE_SIZE, + /* boundary */ (align == 1) ? + USB_PAGE_SIZE : 0, /* lowaddr */ (2ULL << (udt->tag_parent->dma_bits - 1)) - 1, /* highaddr */ BUS_SPACE_MAXADDR, /* filter */ NULL,
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