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| author | Guennadi Liakhovetski <g.liakhovetski@gmx.de> | 2011-08-18 18:50:51 +0400 |
|---|---|---|
| committer | Vinod Koul <vinod.koul@intel.com> | 2011-08-29 16:31:27 +0400 |
| commit | 981ed70d8e4faf3689dbf3c48868a31d5b004d7a (patch) | |
| tree | f2fbc7a92971eb6684e39d376f04606fe54697ab | |
| parent | 57001a606f845ce2eda21a0f23e6aab20ee0cb04 (diff) | |
| download | linux-981ed70d8e4faf3689dbf3c48868a31d5b004d7a.tar.xz | |
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>
| -rw-r--r-- | drivers/dma/dmatest.c | 17 |
1 files changed, 15 insertions, 2 deletions
diff --git a/drivers/dma/dmatest.c b/drivers/dma/dmatest.c index accc18441b16..eb1d8641cf5c 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) { |