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Subject[PATCH] intel_th: Fix dma_map_sg error check
Date
dma_map_sg return 0 on error.

Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com>
Cc: linux-kernel@vger.kernel.org
Fixes: 4e0eaf239fb3 ("intel_th: msu: Fix single mode with IOMMU")
Signed-off-by: Jack Wang <jinpu.wang@ionos.com>
---
drivers/hwtracing/intel_th/msu.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/hwtracing/intel_th/msu.c b/drivers/hwtracing/intel_th/msu.c
index 6c8215a47a60..b49237d56a60 100644
--- a/drivers/hwtracing/intel_th/msu.c
+++ b/drivers/hwtracing/intel_th/msu.c
@@ -931,7 +931,7 @@ static int msc_buffer_contig_alloc(struct msc *msc, unsigned long size)

ret = dma_map_sg(msc_dev(msc)->parent->parent, msc->single_sgt.sgl, 1,
DMA_FROM_DEVICE);
- if (ret < 0)
+ if (!ret)
goto err_free_pages;

msc->nr_pages = nr_pages;
--
2.34.1
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