This is a note to let you know that I've just added the patch titled
PCI: dwc: Fix a 64bit bug in dw_pcie_ep_raise_msix_irq()
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-fix-a-64bit-bug-in-dw_pcie_ep_raise_msix_irq.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 cbc98e30eb470a924d2fd59ae693d5480b3d263d Mon Sep 17 00:00:00 2001
From: Dan Carpenter <dan.carpenter@xxxxxxxxxx>
Date: Fri, 26 Jan 2024 11:40:37 +0300
Subject: PCI: dwc: Fix a 64bit bug in dw_pcie_ep_raise_msix_irq()
From: Dan Carpenter <dan.carpenter@xxxxxxxxxx>
commit b5d1b4b46f856da1473c7ba9a5cdfcb55c9b2478 upstream.
The "msg_addr" variable is u64. However, the "aligned_offset" is an
unsigned int. This means that when the code does:
msg_addr &= ~aligned_offset;
it will unintentionally zero out the high 32 bits. Use ALIGN_DOWN() to do
the alignment instead.
Fixes: 2217fffcd63f ("PCI: dwc: endpoint: Fix dw_pcie_ep_raise_msix_irq() alignment support")
Link: https://lore.kernel.org/r/af59c7ad-ab93-40f7-ad4a-7ac0b14d37f5@moroto.mountain
Signed-off-by: Dan Carpenter <dan.carpenter@xxxxxxxxxx>
Signed-off-by: Bjorn Helgaas <bhelgaas@xxxxxxxxxx>
Reviewed-by: Niklas Cassel <cassel@xxxxxxxxxx>
Reviewed-by: Ilpo Järvinen <ilpo.jarvinen@xxxxxxxxxxxxxxx>
Reviewed-by: Manivannan Sadhasivam <manivannan.sadhasivam@xxxxxxxxxx>
Cc: <stable@xxxxxxxxxxxxxxx>
Signed-off-by: Niklas Cassel <cassel@xxxxxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
---
drivers/pci/controller/dwc/pcie-designware-ep.c | 3 ++-
1 file changed, 2 insertions(+), 1 deletion(-)
--- a/drivers/pci/controller/dwc/pcie-designware-ep.c
+++ b/drivers/pci/controller/dwc/pcie-designware-ep.c
@@ -6,6 +6,7 @@
* Author: Kishon Vijay Abraham I <kishon@xxxxxx>
*/
+#include <linux/align.h>
#include <linux/of.h>
#include <linux/platform_device.h>
@@ -589,7 +590,7 @@ int dw_pcie_ep_raise_msix_irq(struct dw_
}
aligned_offset = msg_addr & (epc->mem->window.page_size - 1);
- msg_addr &= ~aligned_offset;
+ msg_addr = ALIGN_DOWN(msg_addr, epc->mem->window.page_size);
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 dan.carpenter@xxxxxxxxxx are
queue-5.15/pci-dwc-fix-a-64bit-bug-in-dw_pcie_ep_raise_msix_irq.patch
