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authorKai Vehmanen <kai.vehmanen@linux.intel.com>2020-01-24 15:36:22 -0600
committerMark Brown <broonie@kernel.org>2020-01-27 17:52:09 +0000
commite6110114d18d330c05fd6de9f31283fd086a5a3a (patch)
treec40211cb7a850ea515cebca5948cf6ac28090d2d /sound
parent410e5e55c9c1c9c0d452ac5b9adb37b933a7747e (diff)
downloadlinux-e6110114d18d330c05fd6de9f31283fd086a5a3a.tar.bz2
ASoC: SOF: trace: fix unconditional free in trace release
Check if DMA pages were successfully allocated in initialization before calling free. For many types of memory (like sgbufs) the extra free is harmless, but not all backends track allocation state, so add an explicit check. Signed-off-by: Kai Vehmanen <kai.vehmanen@linux.intel.com> Signed-off-by: Pierre-Louis Bossart <pierre-louis.bossart@linux.intel.com> Link: https://lore.kernel.org/r/20200124213625.30186-5-pierre-louis.bossart@linux.intel.com Signed-off-by: Mark Brown <broonie@kernel.org>
Diffstat (limited to 'sound')
-rw-r--r--sound/soc/sof/trace.c7
1 files changed, 5 insertions, 2 deletions
diff --git a/sound/soc/sof/trace.c b/sound/soc/sof/trace.c
index 4bb65030819d..d815090252f8 100644
--- a/sound/soc/sof/trace.c
+++ b/sound/soc/sof/trace.c
@@ -343,7 +343,10 @@ void snd_sof_free_trace(struct snd_sof_dev *sdev)
snd_sof_release_trace(sdev);
- snd_dma_free_pages(&sdev->dmatb);
- snd_dma_free_pages(&sdev->dmatp);
+ if (sdev->dma_trace_pages) {
+ snd_dma_free_pages(&sdev->dmatb);
+ snd_dma_free_pages(&sdev->dmatp);
+ sdev->dma_trace_pages = 0;
+ }
}
EXPORT_SYMBOL(snd_sof_free_trace);