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authorGuennadi Liakhovetski <g.liakhovetski@gmx.de>2011-08-18 16:50:51 +0200
committerVinod Koul <vinod.koul@intel.com>2011-08-29 18:01:27 +0530
commit981ed70d8e4faf3689dbf3c48868a31d5b004d7a (patch)
treef2fbc7a92971eb6684e39d376f04606fe54697ab /drivers/dma
parent57001a606f845ce2eda21a0f23e6aab20ee0cb04 (diff)
dmatest: make dmatest threads freezable
Making dmatest threads freezable allows its use for system PM testing. Signed-off-by: Guennadi Liakhovetski <g.liakhovetski@gmx.de> Acked-by: Dan Williams <dan.j.williams@intel.com> Signed-off-by: Vinod Koul <vinod.koul@intel.com>
Diffstat (limited to 'drivers/dma')
-rw-r--r--drivers/dma/dmatest.c17
1 files changed, 15 insertions, 2 deletions
diff --git a/drivers/dma/dmatest.c b/drivers/dma/dmatest.c
index accc18441b1..eb1d8641cf5 100644
--- a/drivers/dma/dmatest.c
+++ b/drivers/dma/dmatest.c
@@ -10,6 +10,7 @@
#include <linux/delay.h>
#include <linux/dma-mapping.h>
#include <linux/dmaengine.h>
+#include <linux/freezer.h>
#include <linux/init.h>
#include <linux/kthread.h>
#include <linux/module.h>
@@ -251,6 +252,7 @@ static int dmatest_func(void *data)
int i;
thread_name = current->comm;
+ set_freezable_with_signal();
ret = -ENOMEM;
@@ -305,7 +307,8 @@ static int dmatest_func(void *data)
dma_addr_t dma_srcs[src_cnt];
dma_addr_t dma_dsts[dst_cnt];
struct completion cmp;
- unsigned long tmo = msecs_to_jiffies(timeout);
+ unsigned long start, tmo, end = 0 /* compiler... */;
+ bool reload = true;
u8 align = 0;
total_tests++;
@@ -404,7 +407,17 @@ static int dmatest_func(void *data)
}
dma_async_issue_pending(chan);
- tmo = wait_for_completion_timeout(&cmp, tmo);
+ do {
+ start = jiffies;
+ if (reload)
+ end = start + msecs_to_jiffies(timeout);
+ else if (end <= start)
+ end = start + 1;
+ tmo = wait_for_completion_interruptible_timeout(&cmp,
+ end - start);
+ reload = try_to_freeze();
+ } while (tmo == -ERESTARTSYS);
+
status = dma_async_is_tx_complete(chan, cookie, NULL, NULL);
if (tmo == 0) {