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pci-v6.3-fixes-2 

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Merge tag 'pci-v6.3-fixes-2' of git://git.kernel.org/pub/scm/linux/kernel/git/pci/pci

Pull pci fixes from Bjorn Helgaas:

 - Provide pci_msix_can_alloc_dyn() stub when CONFIG_PCI_MSI unset to
   avoid build errors (Reinette Chatre)

 - Quirk AMD XHCI controller that loses MSI-X state in D3hot to avoid
   broken USB after hotplug or suspend/resume (Basavaraj Natikar)

 - Fix use-after-free in pci_bus_release_domain_nr() (Rob Herring)

* tag 'pci-v6.3-fixes-2' of git://git.kernel.org/pub/scm/linux/kernel/git/pci/pci:
  PCI: Fix use-after-free in pci_bus_release_domain_nr()
  x86/PCI: Add quirk for AMD XHCI controller that loses MSI-X state in D3hot
  PCI/MSI: Provide missing stub for pci_msix_can_alloc_dyn()
This commit is contained in:
Linus Torvalds 2023-04-11 11:59:49 -07:00
parent 2c40519251 30ba2d09ed
commit e62252bc55
3 changed files with 26 additions and 2 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

21
arch/x86/pci/fixup.c
View File

@ -7,6 +7,7 @@
#include <linux/dmi.h>
#include <linux/pci.h>
#include <linux/vgaarb.h>
#include <asm/amd_nb.h>
#include <asm/hpet.h>
#include <asm/pci_x86.h>
@ -824,3 +825,23 @@ static void rs690_fix_64bit_dma(struct pci_dev *pdev)
DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_ATI, 0x7910, rs690_fix_64bit_dma);
#endif
#ifdef CONFIG_AMD_NB
#define AMD_15B8_RCC_DEV2_EPF0_STRAP2 0x10136008
#define AMD_15B8_RCC_DEV2_EPF0_STRAP2_NO_SOFT_RESET_DEV2_F0_MASK 0x00000080L
static void quirk_clear_strap_no_soft_reset_dev2_f0(struct pci_dev *dev)
{
u32 data;
if (!amd_smn_read(0, AMD_15B8_RCC_DEV2_EPF0_STRAP2, &data)) {
data &= ~AMD_15B8_RCC_DEV2_EPF0_STRAP2_NO_SOFT_RESET_DEV2_F0_MASK;
if (amd_smn_write(0, AMD_15B8_RCC_DEV2_EPF0_STRAP2, data))
pci_err(dev, "Failed to write data 0x%x\n", data);
} else {
pci_err(dev, "Failed to read data\n");
}
}
DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_AMD, 0x15b8, quirk_clear_strap_no_soft_reset_dev2_f0);
#endif

5
drivers/pci/remove.c
View File

@ -157,8 +157,6 @@ void pci_remove_root_bus(struct pci_bus *bus)
list_for_each_entry_safe(child, tmp,
&bus->devices, bus_list)
pci_remove_bus_device(child);
pci_remove_bus(bus);
host_bridge->bus = NULL;
#ifdef CONFIG_PCI_DOMAINS_GENERIC
/* Release domain_nr if it was dynamically allocated */
@ -166,6 +164,9 @@ void pci_remove_root_bus(struct pci_bus *bus)
pci_bus_release_domain_nr(bus, host_bridge->dev.parent);
#endif
pci_remove_bus(bus);
host_bridge->bus = NULL;
/* remove the host bridge */
device_del(&host_bridge->dev);
}

2
include/linux/pci.h
View File

@ -1624,6 +1624,8 @@ pci_alloc_irq_vectors(struct pci_dev *dev, unsigned int min_vecs,
flags, NULL);
}
static inline bool pci_msix_can_alloc_dyn(struct pci_dev *dev)
{ return false; }
static inline struct msi_map pci_msix_alloc_irq_at(struct pci_dev *dev, unsigned int index,
const struct irq_affinity_desc *affdesc)
{