This is a note to let you know that I've just added the patch titled
PCI: dwc: endpoint: Fix dw_pcie_ep_raise_msix_irq() alignment support
to the 5.15-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-dwc-endpoint-fix-dw_pcie_ep_raise_msix_irq-alignment-support.patch
and it can be found in the queue-5.15 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.
>From 2217fffcd63f86776c985d42e76daa43a56abdf1 Mon Sep 17 00:00:00 2001
From: Niklas Cassel <niklas.cassel@xxxxxxx>
Date: Tue, 28 Nov 2023 14:22:30 +0100
Subject: PCI: dwc: endpoint: Fix dw_pcie_ep_raise_msix_irq() alignment support
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From: Niklas Cassel <niklas.cassel@xxxxxxx>
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@xxxxxxxxxxx
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@xxxxxxx>
Signed-off-by: Krzysztof Wilczyński <kwilczynski@xxxxxxxxxx>
Reviewed-by: Manivannan Sadhasivam <manivannan.sadhasivam@xxxxxxxxxx>
Cc: stable@xxxxxxxxxxxxxxx # 5.7
Cc: Kishon Vijay Abraham I <kishon@xxxxxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
---
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
@@ -589,6 +589,7 @@ 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)
Patches currently in stable-queue which might be from niklas.cassel@xxxxxxx are
queue-5.15/pci-dwc-endpoint-fix-dw_pcie_ep_raise_msix_irq-alignment-support.patch
