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Commit 981ed70d authored by Guennadi Liakhovetski's avatar Guennadi Liakhovetski Committed by Vinod Koul
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dmatest: make dmatest threads freezable 



Making dmatest threads freezable allows its use for system PM testing.

Signed-off-by: default avatarGuennadi Liakhovetski <g.liakhovetski@gmx.de>
Acked-by: default avatarDan Williams <dan.j.williams@intel.com>
Signed-off-by: default avatarVinod Koul <vinod.koul@intel.com>
parent 57001a60

drivers/dma/dmatest.c

+15 −2
Original line number Diff line number Diff line
@@ -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) {