Messages in this thread Patch in this message | | | Date | Thu, 24 Sep 2020 19:06:23 +0800 | From | Jisheng Zhang <> | Subject | [PATCH v2 2/5] PCI: dwc: Check alloc_page() return value |
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We need to check alloc_page() succeed or not before continuing.
Signed-off-by: Jisheng Zhang <Jisheng.Zhang@synaptics.com> --- drivers/pci/controller/dwc/pcie-designware-host.c | 5 +++++ 1 file changed, 5 insertions(+)
diff --git a/drivers/pci/controller/dwc/pcie-designware-host.c b/drivers/pci/controller/dwc/pcie-designware-host.c index 0a19de946351..9e04e8ef3aa4 100644 --- a/drivers/pci/controller/dwc/pcie-designware-host.c +++ b/drivers/pci/controller/dwc/pcie-designware-host.c @@ -303,6 +303,11 @@ void dw_pcie_msi_init(struct pcie_port *pp) u64 msi_target; pp->msi_page = alloc_page(GFP_KERNEL); + if (!pp->msi_page) { + dev_err(dev, "Failed to alloc MSI page\n"); + return; + } + pp->msi_data = dma_map_page(dev, pp->msi_page, 0, PAGE_SIZE, DMA_FROM_DEVICE); if (dma_mapping_error(dev, pp->msi_data)) { -- 2.28.0
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