From 981ed70d8e4faf3689dbf3c48868a31d5b004d7a Mon Sep 17 00:00:00 2001 From: Guennadi Liakhovetski Date: Thu, 18 Aug 2011 16:50:51 +0200 Subject: dmatest: make dmatest threads freezable Making dmatest threads freezable allows its use for system PM testing. Signed-off-by: Guennadi Liakhovetski Acked-by: Dan Williams Signed-off-by: Vinod Koul --- drivers/dma/dmatest.c | 17 +++++++++++++++-- 1 file changed, 15 insertions(+), 2 deletions(-) (limited to 'drivers/dma/dmatest.c') 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 #include #include +#include #include #include #include @@ -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) { -- cgit v1.2.3