6.6-stable review patch. If anyone has any objections, please let me know.
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From: Niklas Cassel niklas.cassel@wdc.com
commit 2217fffcd63f86776c985d42e76daa43a56abdf1 upstream.
Commit 6f5e193bfb55 ("PCI: dwc: Fix dw_pcie_ep_raise_msix_irq() to get correct MSI-X table address") modified dw_pcie_ep_raise_msix_irq() to support iATUs which require a specific alignment.
However, this support cannot have been properly tested.
The whole point is for the iATU to map an address that is aligned, using dw_pcie_ep_map_addr(), and then let the writel() write to ep->msi_mem + aligned_offset.
Thus, modify the address that is mapped such that it is aligned. With this change, dw_pcie_ep_raise_msix_irq() matches the logic in dw_pcie_ep_raise_msi_irq().
Link: https://lore.kernel.org/linux-pci/20231128132231.2221614-1-nks@flawful.org Fixes: 6f5e193bfb55 ("PCI: dwc: Fix dw_pcie_ep_raise_msix_irq() to get correct MSI-X table address") Signed-off-by: Niklas Cassel niklas.cassel@wdc.com Signed-off-by: Krzysztof Wilczyński kwilczynski@kernel.org Reviewed-by: Manivannan Sadhasivam manivannan.sadhasivam@linaro.org Cc: stable@vger.kernel.org # 5.7 Cc: Kishon Vijay Abraham I kishon@kernel.org Signed-off-by: Greg Kroah-Hartman gregkh@linuxfoundation.org --- drivers/pci/controller/dwc/pcie-designware-ep.c | 1 + 1 file changed, 1 insertion(+)
--- a/drivers/pci/controller/dwc/pcie-designware-ep.c +++ b/drivers/pci/controller/dwc/pcie-designware-ep.c @@ -598,6 +598,7 @@ int dw_pcie_ep_raise_msix_irq(struct dw_ }
aligned_offset = msg_addr & (epc->mem->window.page_size - 1); + msg_addr &= ~aligned_offset; ret = dw_pcie_ep_map_addr(epc, func_no, 0, ep->msi_mem_phys, msg_addr, epc->mem->window.page_size); if (ret)