NTB: Address out of DMA descriptor issue with NTB

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The transport right now does not handle the case where we run out of DMA
descriptors. We just fail when we do not succeed. Adding code to retry for
a bit attempting to use the DMA engine instead of instantly fail to CPU
copy.

Signed-off-by: Dave Jiang <dave.jiang@intel.com>
Reviewed-by: Allen Hubbe <Allen.Hubbe@emc.com>
Signed-off-by: Jon Mason <jdmason@kudzu.us>

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Dave Jiang 2016-01-08 09:51:05 -07:00 • committed by Jon Mason

parent 703872c2c5

commit 8c874cc140

1 changed files with 41 additions and 7 deletions

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48

drivers/ntb/ntb_transport.c

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