Searched hist:"9 c4d1e7b" (Results 1 – 1 of 1) sorted by relevance
| /openbmc/linux/drivers/dma/ |
| H A D | fsldma.c | 9c4d1e7b Thu Mar 03 01:54:59 CST 2011 Ira Snyder <iws@ovro.caltech.edu> fsldma: support async_tx dependencies and automatic unmapping
Previous to this patch, the dma_run_dependencies() function has been
called while holding desc_lock. This function can call tx_submit() for
other descriptors, which may try to re-grab the lock. Avoid this by
moving the descriptors to be cleaned up to a temporary list, and
dropping the lock before cleanup.
At the same time, add support for automatic unmapping of src and dst
buffers, as offered by the DMAEngine API.
Signed-off-by: Ira W. Snyder <iws@ovro.caltech.edu>
Signed-off-by: Dan Williams <dan.j.williams@intel.com>
9c4d1e7b Thu Mar 03 01:54:59 CST 2011 Ira Snyder <iws@ovro.caltech.edu> fsldma: support async_tx dependencies and automatic unmapping
Previous to this patch, the dma_run_dependencies() function has been
called while holding desc_lock. This function can call tx_submit() for
other descriptors, which may try to re-grab the lock. Avoid this by
moving the descriptors to be cleaned up to a temporary list, and
dropping the lock before cleanup.
At the same time, add support for automatic unmapping of src and dst
buffers, as offered by the DMAEngine API.
Signed-off-by: Ira W. Snyder <iws@ovro.caltech.edu>
Signed-off-by: Dan Williams <dan.j.williams@intel.com>
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