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Diffstat (limited to 'arch/ia64/kernel/efi.c')
-rw-r--r--arch/ia64/kernel/efi.c41
1 files changed, 20 insertions, 21 deletions
diff --git a/arch/ia64/kernel/efi.c b/arch/ia64/kernel/efi.c
index 9990320b6f9..2993748c13d 100644
--- a/arch/ia64/kernel/efi.c
+++ b/arch/ia64/kernel/efi.c
@@ -677,27 +677,34 @@ EXPORT_SYMBOL(efi_mem_attributes);
/*
* Determines whether the memory at phys_addr supports the desired
* attribute (WB, UC, etc). If this returns 1, the caller can safely
- * access *size bytes at phys_addr with the specified attribute.
+ * access size bytes at phys_addr with the specified attribute.
*/
-static int
-efi_mem_attribute_range (unsigned long phys_addr, unsigned long *size, u64 attr)
+int
+efi_mem_attribute_range (unsigned long phys_addr, unsigned long size, u64 attr)
{
+ unsigned long end = phys_addr + size;
efi_memory_desc_t *md = efi_memory_descriptor(phys_addr);
- unsigned long md_end;
- if (!md || (md->attribute & attr) != attr)
+ /*
+ * Some firmware doesn't report MMIO regions in the EFI memory
+ * map. The Intel BigSur (a.k.a. HP i2000) has this problem.
+ * On those platforms, we have to assume UC is valid everywhere.
+ */
+ if (!md || (md->attribute & attr) != attr) {
+ if (attr == EFI_MEMORY_UC && !efi_memmap_has_mmio())
+ return 1;
return 0;
+ }
do {
- md_end = efi_md_end(md);
- if (phys_addr + *size <= md_end)
+ unsigned long md_end = efi_md_end(md);
+
+ if (end <= md_end)
return 1;
md = efi_memory_descriptor(md_end);
- if (!md || (md->attribute & attr) != attr) {
- *size = md_end - phys_addr;
- return 1;
- }
+ if (!md || (md->attribute & attr) != attr)
+ return 0;
} while (md);
return 0;
}
@@ -708,7 +715,7 @@ efi_mem_attribute_range (unsigned long phys_addr, unsigned long *size, u64 attr)
* control access size.
*/
int
-valid_phys_addr_range (unsigned long phys_addr, unsigned long *size)
+valid_phys_addr_range (unsigned long phys_addr, unsigned long size)
{
return efi_mem_attribute_range(phys_addr, size, EFI_MEMORY_WB);
}
@@ -723,7 +730,7 @@ valid_phys_addr_range (unsigned long phys_addr, unsigned long *size)
* because that doesn't appear in the boot-time EFI memory map.
*/
int
-valid_mmap_phys_addr_range (unsigned long phys_addr, unsigned long *size)
+valid_mmap_phys_addr_range (unsigned long phys_addr, unsigned long size)
{
if (efi_mem_attribute_range(phys_addr, size, EFI_MEMORY_WB))
return 1;
@@ -731,14 +738,6 @@ valid_mmap_phys_addr_range (unsigned long phys_addr, unsigned long *size)
if (efi_mem_attribute_range(phys_addr, size, EFI_MEMORY_UC))
return 1;
- /*
- * Some firmware doesn't report MMIO regions in the EFI memory map.
- * The Intel BigSur (a.k.a. HP i2000) has this problem. In this
- * case, we can't use the EFI memory map to validate mmap requests.
- */
- if (!efi_memmap_has_mmio())
- return 1;
-
return 0;
}