Messages in this thread Patch in this message | | | From | Jack Wang <> | Subject | [PATCHv2] intel_th: Fix dma_map_sg error check | Date | Fri, 26 Aug 2022 12:38:43 +0200 |
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dma_map_sg return 0 on error, return -EIO in case of error.
Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com> Cc: christophe.jaillet@wanadoo.fr 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 | 4 +++- 1 file changed, 3 insertions(+), 1 deletion(-)
diff --git a/drivers/hwtracing/intel_th/msu.c b/drivers/hwtracing/intel_th/msu.c index 6c8215a47a60..472e1a4bafc1 100644 --- a/drivers/hwtracing/intel_th/msu.c +++ b/drivers/hwtracing/intel_th/msu.c @@ -931,8 +931,10 @@ 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) { + ret = -EIO; goto err_free_pages; + } msc->nr_pages = nr_pages; msc->base = page_address(page); -- 2.34.1
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