From: Dan Williams <dan.j.williams@intel.com>
Date: Fri, 18 Jul 2008 00:59:56 +0000 (-0700)
Subject: iop_adma: directly reclaim descriptors on allocation failure
X-Git-Tag: v2.6.27-rc1~852^2~5
X-Git-Url: http://pilppa.com/gitweb/?a=commitdiff_plain;h=c7141d005a19d2a0a316b3bf9c170d3bedf07bfd;p=linux-2.6-omap-h63xx.git

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 434013d4128..8acbc3ab0b9 100644
--- 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;
 }