This is a note to let you know that I've just added the patch titled PCI: rcar: Always allocate MSI addresses in 32bit space to the 5.11-stable tree which can be found at: http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary The filename of the patch is: pci-rcar-always-allocate-msi-addresses-in-32bit-spac.patch and it can be found in the queue-5.11 subdirectory. If you, or anyone else, feels it should not be added to the stable tree, please let <stable@xxxxxxxxxxxxxxx> know about it. commit 7a3588f43659b0adc6cacac8808a5647d8a84cb4 Author: Marek Vasut <marek.vasut+renesas@xxxxxxxxx> Date: Fri Oct 16 14:04:31 2020 +0200 PCI: rcar: Always allocate MSI addresses in 32bit space [ Upstream commit c4e0fec2f7ee013dbf86445394ff47f719408f99 ] This fixes MSI operation on legacy PCI cards, which cannot issue 64bit MSIs. The R-Car controller only has one MSI trigger address instead of two, one for 64bit and one for 32bit MSI, set the address to 32bit PCIe space so that legacy PCI cards can also trigger MSIs. Link: https://lore.kernel.org/r/20201016120431.7062-1-marek.vasut@xxxxxxxxx Fixes: 290c1fb35860 ("PCI: rcar: Add MSI support for PCIe") Tested-by: Yoshihiro Shimoda <yoshihiro.shimoda.uh@xxxxxxxxxxx> Tested-by: Geert Uytterhoeven <geert+renesas@xxxxxxxxx> Signed-off-by: Marek Vasut <marek.vasut+renesas@xxxxxxxxx> Signed-off-by: Lorenzo Pieralisi <lorenzo.pieralisi@xxxxxxx> Reviewed-by: Yoshihiro Shimoda <yoshihiro.shimoda.uh@xxxxxxxxxxx> Reviewed-by: Geert Uytterhoeven <geert+renesas@xxxxxxxxx> Cc: Bjorn Helgaas <bhelgaas@xxxxxxxxxx> Cc: Geert Uytterhoeven <geert+renesas@xxxxxxxxx> Cc: Lorenzo Pieralisi <lorenzo.pieralisi@xxxxxxx> Cc: Wolfram Sang <wsa@xxxxxxxxxxxxx> Cc: Yoshihiro Shimoda <yoshihiro.shimoda.uh@xxxxxxxxxxx> Cc: linux-renesas-soc@xxxxxxxxxxxxxxx Signed-off-by: Sasha Levin <sashal@xxxxxxxxxx> diff --git a/drivers/pci/controller/pcie-rcar-host.c b/drivers/pci/controller/pcie-rcar-host.c index 4d1c4b24e5370..a728e8f9ad3c8 100644 --- a/drivers/pci/controller/pcie-rcar-host.c +++ b/drivers/pci/controller/pcie-rcar-host.c @@ -735,7 +735,7 @@ static int rcar_pcie_enable_msi(struct rcar_pcie_host *host) } /* setup MSI data target */ - msi->pages = __get_free_pages(GFP_KERNEL, 0); + msi->pages = __get_free_pages(GFP_KERNEL | GFP_DMA32, 0); rcar_pcie_hw_enable_msi(host); return 0;