fsldma: reduce locking during descriptor cleanup

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This merges the fsl_chan_ld_cleanup() function into the dma_do_tasklet()
function to reduce locking overhead. In the best case, we will be able
to keep the DMA controller busy while we are freeing used descriptors.
In all cases, the spinlock is grabbed two times fewer than before on
each transaction.

Signed-off-by: Ira W. Snyder <iws@ovro.caltech.edu>
Signed-off-by: Dan Williams <dan.j.williams@intel.com>

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Ira Snyder 2011-03-03 07:55:00 +00:00 • committed by Dan Williams

parent 9c4d1e7bde

commit dc8d409157

1 changed files with 46 additions and 62 deletions

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108

drivers/dma/fsldma.c

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