Re: [PATCH v3 1/3] powerpc/512x: add LocalPlus Bus FIFO device driver

From: Timur Tabi
Date: Mon Sep 28 2015 - 09:18:31 EST

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.
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