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xen: fixes for 4.14-rc3

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Merge tag 'for-linus-4.14c-rc3-tag' of git://git.kernel.org/pub/scm/linux/kernel/git/xen/tip

Pull xen fixes from Juergen Gross:

 - avoid a warning when compiling with clang

 - consider read-only bits in xen-pciback when writing to a BAR

 - fix a boot crash of pv-domains

* tag 'for-linus-4.14c-rc3-tag' of git://git.kernel.org/pub/scm/linux/kernel/git/xen/tip:
  xen/mmu: Call xen_cleanhighmap() with 4MB aligned for page tables mapping
  xen-pciback: relax BAR sizing write value check
  x86/xen: clean up clang build warning
This commit is contained in:
Linus Torvalds 2017-09-29 12:24:28 -07:00
commit 9f2a5128b9
3 changed files with 16 additions and 12 deletions
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11
drivers/xen/xen-pciback/conf_space_header.c
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@ -169,6 +169,9 @@ static int rom_write(struct pci_dev *dev, int offset, u32 value, void *data)
static int bar_write(struct pci_dev *dev, int offset, u32 value, void *data)
{
struct pci_bar_info *bar = data;
unsigned int pos = (offset - PCI_BASE_ADDRESS_0) / 4;
const struct resource *res = dev->resource;
u32 mask;
if (unlikely(!bar)) {
pr_warn(DRV_NAME ": driver data not found for %s\n",
@ -179,7 +182,13 @@ static int bar_write(struct pci_dev *dev, int offset, u32 value, void *data)
/* A write to obtain the length must happen as a 32-bit write.
* This does not (yet) support writing individual bytes
*/
if (value == ~0)
if (res[pos].flags & IORESOURCE_IO)
mask = ~PCI_BASE_ADDRESS_IO_MASK;
else if (pos && (res[pos - 1].flags & IORESOURCE_MEM_64))
mask = 0;
else
mask = ~PCI_BASE_ADDRESS_MEM_MASK;
if ((value | mask) == ~0U)
bar->which = 1;
else {
u32 tmpval;