iop_adma: directly reclaim descriptors on allocation failure

Force callers that trigger an "out of descriptors" condition to run the
cleanup loop directly.  Alleviates the requirement to have soft-irqs
enabled when polling for a descriptor in async_xor.

Signed-off-by: Dan Williams <dan.j.williams@intel.com>

diff --git a/drivers/dma/iop-adma.c b/drivers/dma/iop-adma.c
index 434013d..8acbc3a 100644 (file)
--- a/drivers/dma/iop-adma.c
+++ b/drivers/dma/iop-adma.c
@@ -373,8 +373,8 @@ retry:
        if (!retry++)
                goto retry;
 
-       /* try to free some slots if the allocation fails */
-       tasklet_schedule(&iop_chan->irq_tasklet);
+       /* perform direct reclaim if the allocation fails */
+       __iop_adma_slot_cleanup(iop_chan);
 
        return NULL;
 }