From: Timur Tabi <timur@tabi•org>
To: alex.popov@linux•com,
Benjamin Herrenschmidt <benh@kernel•crashing.org>,
Paul Mackerras <paulus@samba•org>,
Michael Ellerman <mpe@ellerman•id.au>,
Anatolij Gustschin <agust@denx•de>, Rob Herring <robh@kernel•org>,
Grant Likely <grant.likely@linaro•org>,
Dan Williams <dan.j.williams@intel•com>,
Vinod Koul <vinod.koul@intel•com>,
Pawel Moll <pawel.moll@arm•com>,
Mark Rutland <mark.rutland@arm•com>,
Ian Campbell <ijc+devicetree@hellion•org.uk>,
Kumar Gala <galak@codeaurora•org>,
linuxppc-dev@lists•ozlabs.org, dmaengine@vger•kernel.org,
devicetree@vger•kernel.org, linux-kernel@vger•kernel.org
Subject: Re: [PATCH v3 1/3] powerpc/512x: add LocalPlus Bus FIFO device driver
Date: Mon, 28 Sep 2015 08:18:21 -0500 [thread overview]
Message-ID: <56093E1D.4080008@tabi.org> (raw)
In-Reply-To: <56093CE5.5070301@linux.com>
Alexander Popov wrote:
> The only question I have: why calling dma_unmap_single() from within
> a spinlock is a bad practice?
I don't know, but usually functions that allocate or free memory cannot
be called from within a spinlock. You need to check that. Since the
MPC5121 is a single-core CPU, you might not notice if you're doing
something wrong.
next prev parent reply other threads:[~2015-09-28 13:18 UTC|newest]
Thread overview: 19+ messages / expand[flat|nested] mbox.gz Atom feed top
2015-09-24 17:28 [PATCH v3 0/3] powerpc/512x: add LocalPlus Bus FIFO device driver Alexander Popov
2015-09-24 17:28 ` [PATCH v3 1/3] " Alexander Popov
2015-09-25 1:01 ` Timur Tabi
2015-09-28 13:13 ` Alexander Popov
2015-09-28 13:18 ` Timur Tabi [this message]
2015-09-29 6:34 ` Alexander Popov
2015-09-30 21:24 ` Alexander Popov
2015-10-01 17:11 ` Timur Tabi
2015-10-05 22:22 ` Alexander Popov
2015-09-24 17:28 ` [PATCH v3 2/3] powerpc/512x: add a device tree binding for LocalPlus Bus FIFO Alexander Popov
2015-09-25 0:18 ` Timur Tabi
2015-09-28 13:24 ` Alexander Popov
2015-09-28 13:26 ` Timur Tabi
2015-09-29 6:35 ` Alexander Popov
2015-09-24 17:28 ` [PATCH v3 3/3] dmaengine: mpc512x: initialize with subsys_initcall() Alexander Popov
2015-09-25 0:16 ` Timur Tabi
2015-09-28 13:15 ` Alexander Popov
2015-10-07 14:17 ` Vinod Koul
2015-10-07 21:31 ` Alexander Popov
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