The patch below does not apply to the 6.6-stable tree. If someone wants it applied there, or to any other stable or longterm tree, then please email the backport, including the original git commit id to <stable@xxxxxxxxxxxxxxx>. To reproduce the conflict and resubmit, you may use the following commands: git fetch https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git/ linux-6.6.y git checkout FETCH_HEAD git cherry-pick -x b5d1b4b46f856da1473c7ba9a5cdfcb55c9b2478 # <resolve conflicts, build, test, etc.> git commit -s git send-email --to '<stable@xxxxxxxxxxxxxxx>' --in-reply-to '2024021945-droplet-overbid-1f08@gregkh' --subject-prefix 'PATCH 6.6.y' HEAD^.. Possible dependencies: b5d1b4b46f85 ("PCI: dwc: Fix a 64bit bug in dw_pcie_ep_raise_msix_irq()") 2217fffcd63f ("PCI: dwc: endpoint: Fix dw_pcie_ep_raise_msix_irq() alignment support") 92af77ca26f7 ("PCI: dwc: Use FIELD_GET/PREP()") thanks, greg k-h ------------------ original commit in Linus's tree ------------------ >From b5d1b4b46f856da1473c7ba9a5cdfcb55c9b2478 Mon Sep 17 00:00:00 2001 From: Dan Carpenter <dan.carpenter@xxxxxxxxxx> Date: Fri, 26 Jan 2024 11:40:37 +0300 Subject: [PATCH] PCI: dwc: Fix a 64bit bug in dw_pcie_ep_raise_msix_irq() MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit 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> diff --git a/drivers/pci/controller/dwc/pcie-designware-ep.c b/drivers/pci/controller/dwc/pcie-designware-ep.c index 5befed2dc02b..d6b66597101e 100644 --- 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/bitfield.h> #include <linux/of.h> #include <linux/platform_device.h> @@ -551,7 +552,7 @@ int dw_pcie_ep_raise_msix_irq(struct dw_pcie_ep *ep, u8 func_no, } 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)
