From: Venu Byravarasu <vbyravarasu@nvidia.com>
To: <gregkh@linuxfoundation.org>, <rdunlap@xenotime.net>,
<lars@metafoo.de>, <grant.likely@secretlab.ca>, <joe@perches.com>
Cc: <netdev@vger.kernel.org>, <linux-kernel@vger.kernel.org>,
<swarren@nvidia.com>
Subject: What is the significance of coherent_dma_mask?
Date: Wed, 8 Aug 2012 09:28:17 +0530 [thread overview]
Message-ID: <5021E3D8.3010503@nvidia.com> (raw)
Hi,
Some of the USB drivers are setting coherent_dma_mask & many others are
not doing it.
From the description present in the comment beside this field in
device.h, I could not understand its real significance.
Can some one plz let me know its real need and use case where it is
mandatory to use it?
Thanks,
Venu
reply other threads:[~2012-08-08 4:05 UTC|newest]
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