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dmaengine: add verification of DMA_INTERRUPT capability for dmatest

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Looks like I forgot to add DMA_INTERRUPT cap setting to the idxd driver and
dmatest is still working regardless of this mistake. Add an explicit check
of DMA_INTERRUPT capability for dmatest to make sure the DMA device being used
actually supports interrupt before the test is launched and also that the
driver is programmed correctly.

Signed-off-by: Dave Jiang <dave.jiang@intel.com>
Link: https://lore.kernel.org/r/164978679251.2361020.5856734256126725993.stgit@djiang5-desk3.ch.intel.com
Signed-off-by: Vinod Koul <vkoul@kernel.org>
This commit is contained in:
Dave Jiang 2022-04-12 11:06:32 -07:00 committed by Vinod Koul
parent e335de6ba5
commit a8facc7b98
1 changed files with 10 additions and 3 deletions
repo.diff.show_diff_stats Download patch file Download diff file Expand all files Collapse all files

11
drivers/dma/dmatest.c
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@ -675,10 +675,16 @@ static int dmatest_func(void *data)
/* /*
* src and dst buffers are freed by ourselves below * src and dst buffers are freed by ourselves below
*/ */
if (params->polled) if (params->polled) {
flags = DMA_CTRL_ACK; flags = DMA_CTRL_ACK;
else } else {
if (dma_has_cap(DMA_INTERRUPT, dev->cap_mask)) {
flags = DMA_CTRL_ACK | DMA_PREP_INTERRUPT; flags = DMA_CTRL_ACK | DMA_PREP_INTERRUPT;
} else {
pr_err("Channel does not support interrupt!\n");
goto err_pq_array;
}
}
ktime = ktime_get(); ktime = ktime_get();
while (!(kthread_should_stop() || while (!(kthread_should_stop() ||
@ -906,6 +912,7 @@ static int dmatest_func(void *data)
runtime = ktime_to_us(ktime); runtime = ktime_to_us(ktime);
ret = 0; ret = 0;
err_pq_array:
kfree(dma_pq); kfree(dma_pq);
err_srcs_array: err_srcs_array:
kfree(srcs); kfree(srcs);