linux-kernel - [PATCH v1] dmaengine: dmatest: Fix dmatest waiting less when interrupted

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Message-ID: <20250305230007.590178-1-vinicius.gomes@intel.com>
Date: Wed,  5 Mar 2025 15:00:06 -0800
From: Vinicius Costa Gomes <vinicius.gomes@...el.com>
To: Vinod Koul <vkoul@...nel.org>,
	dmaengine@...r.kernel.org,
	linux-kernel@...r.kernel.org
Cc: dave.jiang@...el.com,
	kristen.c.accardi@...el.com,
	Vinicius Costa Gomes <vinicius.gomes@...el.com>,
	kernel test robot <oliver.sang@...el.com>
Subject: [PATCH v1] dmaengine: dmatest: Fix dmatest waiting less when interrupted

Change the "wait for operation finish" logic to take interrupts into
account.

When using dmatest with idxd DMA engine, it's possible that during
longer tests, the interrupt notifying the finish of an operation
happens during wait_event_freezable_timeout(), which causes dmatest to
cleanup all the resources, some of which might still be in use.

This fix ensures that the wait logic correctly handles interrupts,
preventing premature cleanup of resources.

Reported-by: kernel test robot <oliver.sang@...el.com>
Closes: https://lore.kernel.org/oe-lkp/202502171134.8c403348-lkp@intel.com
Signed-off-by: Vinicius Costa Gomes <vinicius.gomes@...el.com>
---
 drivers/dma/dmatest.c | 6 +++---
 1 file changed, 3 insertions(+), 3 deletions(-)

diff --git a/drivers/dma/dmatest.c b/drivers/dma/dmatest.c
index 91b2fbc0b864..d891dfca358e 100644
--- a/drivers/dma/dmatest.c
+++ b/drivers/dma/dmatest.c
@@ -841,9 +841,9 @@ static int dmatest_func(void *data)
 		} else {
 			dma_async_issue_pending(chan);
 
-			wait_event_freezable_timeout(thread->done_wait,
-					done->done,
-					msecs_to_jiffies(params->timeout));
+			wait_event_timeout(thread->done_wait,
+					   done->done,
+					   msecs_to_jiffies(params->timeout));
 
 			status = dma_async_is_tx_complete(chan, cookie, NULL,
 							  NULL);
-- 
2.48.1