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Date: Fri, 26 Aug 2022 12:15:23 +0200 From: Jack Wang <jinpu.wang@...os.com> To: alexander.shishkin@...ux.intel.com Cc: linux-kernel@...r.kernel.org Subject: [PATCH] intel_th: Fix dma_map_sg error check dma_map_sg return 0 on error. Cc: Alexander Shishkin <alexander.shishkin@...ux.intel.com> Cc: linux-kernel@...r.kernel.org Fixes: 4e0eaf239fb3 ("intel_th: msu: Fix single mode with IOMMU") Signed-off-by: Jack Wang <jinpu.wang@...os.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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