[PATCH v4 15/15] dmaengine: dw-edma: Add pcim_iomap_table return checker
From: Gustavo Pimentel <hidden>
Date: 2021-02-03 22:00:41
Also in:
linux-pci, lkml
Subsystem:
designware edma core ip driver, dma generic offload engine subsystem, the rest · Maintainers:
Manivannan Sadhasivam, Vinod Koul, Linus Torvalds
Detected by CoverityScan CID 16555 ("Dereference null return")
Signed-off-by: Gustavo Pimentel <redacted>
---
drivers/dma/dw-edma/dw-edma-pcie.c | 15 +++++++++++++++
1 file changed, 15 insertions(+)
diff --git a/drivers/dma/dw-edma/dw-edma-pcie.c b/drivers/dma/dw-edma/dw-edma-pcie.c
index 686b4ff..7445033 100644
--- a/drivers/dma/dw-edma/dw-edma-pcie.c
+++ b/drivers/dma/dw-edma/dw-edma-pcie.c@@ -238,6 +238,9 @@ static int dw_edma_pcie_probe(struct pci_dev *pdev, dw->rd_ch_cnt = vsec_data.rd_ch_cnt; dw->rg_region.vaddr = pcim_iomap_table(pdev)[vsec_data.rg.bar]; + if (!dw->rg_region.vaddr) + return -ENOMEM; + dw->rg_region.vaddr += vsec_data.rg.off; dw->rg_region.paddr = pdev->resource[vsec_data.rg.bar].start; dw->rg_region.paddr += vsec_data.rg.off;
@@ -250,12 +253,18 @@ static int dw_edma_pcie_probe(struct pci_dev *pdev, struct dw_edma_block *dt_block = &vsec_data.dt_wr[i]; ll_region->vaddr = pcim_iomap_table(pdev)[ll_block->bar]; + if (!ll_region->vaddr) + return -ENOMEM; + ll_region->vaddr += ll_block->off; ll_region->paddr = pdev->resource[ll_block->bar].start; ll_region->paddr += ll_block->off; ll_region->sz = ll_block->sz; dt_region->vaddr = pcim_iomap_table(pdev)[dt_block->bar]; + if (!dt_region->vaddr) + return -ENOMEM; + dt_region->vaddr += dt_block->off; dt_region->paddr = pdev->resource[dt_block->bar].start; dt_region->paddr += dt_block->off;
@@ -269,12 +278,18 @@ static int dw_edma_pcie_probe(struct pci_dev *pdev, struct dw_edma_block *dt_block = &vsec_data.dt_rd[i]; ll_region->vaddr = pcim_iomap_table(pdev)[ll_block->bar]; + if (!ll_region->vaddr) + return -ENOMEM; + ll_region->vaddr += ll_block->off; ll_region->paddr = pdev->resource[ll_block->bar].start; ll_region->paddr += ll_block->off; ll_region->sz = ll_block->sz; dt_region->vaddr = pcim_iomap_table(pdev)[dt_block->bar]; + if (!dt_region->vaddr) + return -ENOMEM; + dt_region->vaddr += dt_block->off; dt_region->paddr = pdev->resource[dt_block->bar].start; dt_region->paddr += dt_block->off;
--
2.7.4