Commit c4e0fec2 authored by Marek Vasut's avatar Marek Vasut Committed by Lorenzo Pieralisi

PCI: rcar: Always allocate MSI addresses in 32bit space

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@gmail.com
Fixes: 290c1fb3 ("PCI: rcar: Add MSI support for PCIe")
Tested-by: default avatarYoshihiro Shimoda <yoshihiro.shimoda.uh@renesas.com>
Tested-by: default avatarGeert Uytterhoeven <geert+renesas@glider.be>
Signed-off-by: default avatarMarek Vasut <marek.vasut+renesas@gmail.com>
Signed-off-by: default avatarLorenzo Pieralisi <lorenzo.pieralisi@arm.com>
Reviewed-by: default avatarYoshihiro Shimoda <yoshihiro.shimoda.uh@renesas.com>
Reviewed-by: default avatarGeert Uytterhoeven <geert+renesas@glider.be>
Cc: Bjorn Helgaas <bhelgaas@google.com>
Cc: Geert Uytterhoeven <geert+renesas@glider.be>
Cc: Lorenzo Pieralisi <lorenzo.pieralisi@arm.com>
Cc: Wolfram Sang <wsa@the-dreams.de>
Cc: Yoshihiro Shimoda <yoshihiro.shimoda.uh@renesas.com>
Cc: linux-renesas-soc@vger.kernel.org
parent 7c53f6b6
......@@ -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;
......
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