[PATCH v2 2/5] PCI: dwc: Check alloc_page() return value

Jisheng Zhang
2020-09-24T11:10:37Z

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