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Date: Tue, 16 Oct 2012 11:45:20 +0300 From: Andy Shevchenko <andriy.shevchenko@...ux.intel.com> To: Vinod Koul <vinod.koul@...el.com>, Viresh Kumar <viresh.linux@...il.com>, linux-kernel@...r.kernel.org, spear-devel <spear-devel@...t.st.com> Cc: Andy Shevchenko <andriy.shevchenko@...ux.intel.com> Subject: [PATCH] dmatest: terminate all ongoing transfers before submitting new one The following error messages come if we have software LLP emulation enabled and enough threads running. modprobe dmatest iterations=40 [ 168.048601] dmatest: Started 1 threads using dma0chan0 [ 168.054546] dmatest: Started 1 threads using dma0chan1 [ 168.060441] dmatest: Started 1 threads using dma0chan2 [ 168.066333] dmatest: Started 1 threads using dma0chan3 [ 168.072250] dmatest: Started 1 threads using dma0chan4 [ 168.078144] dmatest: Started 1 threads using dma0chan5 [ 168.084057] dmatest: Started 1 threads using dma0chan6 [ 168.089948] dmatest: Started 1 threads using dma0chan7 [ 170.032962] dma0chan1-copy0: terminating after 40 tests, 0 failures (status 0) [ 170.041274] dma0chan0-copy0: terminating after 40 tests, 0 failures (status 0) [ 170.597559] dma0chan2-copy0: terminating after 40 tests, 0 failures (status 0) [ 171.085059] dma0chan7-copy0: #0: test timed out [ 171.839710] dma0chan3-copy0: terminating after 40 tests, 0 failures (status 0) [ 172.146071] dma0chan4-copy0: terminating after 40 tests, 0 failures (status 0) [ 172.220802] dma0chan7-copy0: #1: got completion callback, but status is 'in progress' [ 172.242049] dma0chan7-copy0: #2: got completion callback, but status is 'in progress' [ 172.281063] dma0chan7-copy0: #3: got completion callback, but status is 'in progress' [ 172.400866] dma0chan7-copy0: #4: got completion callback, but status is 'in progress' [ 172.471799] dma0chan7-copy0: #5: got completion callback, but status is 'in progress' [ 172.613996] dma0chan7-copy0: #6: got completion callback, but status is 'in progress' [ 172.670286] dma0chan7-copy0: #7: got completion callback, but status is 'in progress' [ 172.750763] dma0chan7-copy0: #8: got completion callback, but status is 'in progress' [ 172.777452] dma0chan5-copy0: terminating after 40 tests, 0 failures (status 0) [ 172.788740] dma0chan7-copy0: #9: got completion callback, but status is 'in progress' [ 172.845156] dma0chan7-copy0: #10: got completion callback, but status is 'in progress' [ 172.906593] dma0chan7-copy0: #11: got completion callback, but status is 'in progress' [ 173.181515] dma0chan6-copy0: terminating after 40 tests, 0 failures (status 0) [ 173.512838] dma0chan7-copy0: terminating after 40 tests, 12 failures (status 0) The patch fixes dmatest module to stop any ongoing transfer before submitting new one. Perhaps there is a better solution and driver logic needs to be fixed as well. After patch we will have modprobe dmatest iterations=50 [ 84.027375] dmatest: Started 1 threads using dma0chan0 [ 84.033282] dmatest: Started 1 threads using dma0chan1 [ 84.039182] dmatest: Started 1 threads using dma0chan2 [ 84.045089] dmatest: Started 1 threads using dma0chan3 [ 84.051003] dmatest: Started 1 threads using dma0chan4 [ 84.056916] dmatest: Started 1 threads using dma0chan5 [ 84.062828] dmatest: Started 1 threads using dma0chan6 [ 84.068714] dmatest: Started 1 threads using dma0chan7 [ 86.538284] dma0chan0-copy0: terminating after 50 tests, 0 failures (status 0) [ 86.842221] dma0chan1-copy0: terminating after 50 tests, 0 failures (status 0) [ 87.060460] dma0chan6-copy0: #0: test timed out [ 87.065614] dma0chan7-copy0: #0: test timed out [ 87.220321] dma0chan2-copy0: terminating after 50 tests, 0 failures (status 0) [ 88.595061] dma0chan3-copy0: terminating after 50 tests, 0 failures (status 0) [ 89.152170] dma0chan4-copy0: terminating after 50 tests, 0 failures (status 0) [ 89.955059] dma0chan5-copy0: terminating after 50 tests, 0 failures (status 0) [ 90.697073] dma0chan6-copy0: terminating after 50 tests, 1 failures (status 0) [ 90.893422] dma0chan7-copy0: terminating after 50 tests, 1 failures (status 0) Signed-off-by: Andy Shevchenko <andriy.shevchenko@...ux.intel.com> --- drivers/dma/dmatest.c | 3 +++ 1 file changed, 3 insertions(+) diff --git a/drivers/dma/dmatest.c b/drivers/dma/dmatest.c index 24225f0..583f882 100644 --- a/drivers/dma/dmatest.c +++ b/drivers/dma/dmatest.c @@ -399,6 +399,9 @@ static int dmatest_func(void *data) continue; } + /* Stop any ongoing transfers here */ + chan->device->device_control(chan, DMA_TERMINATE_ALL, 0); + done.done = false; tx->callback = dmatest_callback; tx->callback_param = &done; -- 1.7.10.4 -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@...r.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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