struct dw_pcie *pci = to_dw_pcie_from_pp(pp);
struct device *dev = pci->dev;
struct platform_device *pdev = to_platform_device(dev);
- u64 *msi_vaddr;
+ u64 *msi_vaddr = NULL;
int ret;
u32 ctrl, num_ctrls;
* memory.
*/
ret = dma_set_coherent_mask(dev, DMA_BIT_MASK(32));
- if (ret)
- dev_warn(dev, "Failed to set DMA mask to 32-bit. Devices with only 32-bit MSI support may not work properly\n");
+ if (!ret)
+ msi_vaddr = dmam_alloc_coherent(dev, sizeof(u64), &pp->msi_data,
+ GFP_KERNEL);
- msi_vaddr = dmam_alloc_coherent(dev, sizeof(u64), &pp->msi_data,
- GFP_KERNEL);
if (!msi_vaddr) {
- dev_err(dev, "Failed to alloc and map MSI data\n");
- dw_pcie_free_msi(pp);
- return -ENOMEM;
+ dev_warn(dev, "Failed to allocate 32-bit MSI address\n");
+ dma_set_coherent_mask(dev, DMA_BIT_MASK(64));
+ msi_vaddr = dmam_alloc_coherent(dev, sizeof(u64), &pp->msi_data,
+ GFP_KERNEL);
+ if (!msi_vaddr) {
+ dev_err(dev, "Failed to allocate MSI address\n");
+ dw_pcie_free_msi(pp);
+ return -ENOMEM;
+ }
}
return 0;