Date: Fri, 13 Feb 2009 15:22:05 +0100 From: Patrick =?ISO-8859-15?Q?Lamaizi=E8re?= <patfbsd@davenulle.org> To: freebsd-hackers@FreeBSD.org Subject: bus_dmamem_alloc() and BUS_DMA_WAITOK Message-ID: <20090213152205.0eccafb0@baby-jane.lamaiziere.net>
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Hello, I would like to know if it is safe to use the BUS_DMA_WAITOK flag with bus_dmamem_alloc(), in the context of the device_attach routine? Many drivers use BUS_DMA_NOWAIT. I need a 32Ko buffer and on low memory my driver cannot attach (bus_dmamem_alloc returns ENOMEM). Will BUS_DMA_WAITOK help in this case? Thanks in advance, regards.
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