aboutsummaryrefslogtreecommitdiff
diff options
context:
space:
mode:
authorLinus Torvalds <torvalds@linux-foundation.org>2021-03-21 11:11:22 -0700
committerLinus Torvalds <torvalds@linux-foundation.org>2021-03-21 11:11:22 -0700
commit92ed88cb4d7cd01eadb0f71063ceb5202548ce35 (patch)
tree11a3aad72e92ef3f68d8c3a9d33f7e86165276c9
parent5e3ddf96e75983e4c404467fbb61b92d09333a1f (diff)
parent429257a430a0e81e9979256e0db718e35e7d9cee (diff)
downloadlinux-stericsson-92ed88cb4d7cd01eadb0f71063ceb5202548ce35.tar.gz
Merge tag 'efi-urgent-2021-03-21' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip
Pull EFI fixes from Ingo Molnar: - another missing RT_PROP table related fix, to ensure that the efivarfs pseudo filesystem fails gracefully if variable services are unsupported - use the correct alignment for literal EFI GUIDs - fix a use after unmap issue in the memreserve code * tag 'efi-urgent-2021-03-21' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip: efi: use 32-bit alignment for efi_guid_t literals firmware/efi: Fix a use after bug in efi_mem_reserve_persistent efivars: respect EFI_UNSUPPORTED return from firmware
-rw-r--r--drivers/firmware/efi/efi.c3
-rw-r--r--drivers/firmware/efi/vars.c4
-rw-r--r--include/linux/efi.h6
3 files changed, 10 insertions, 3 deletions
diff --git a/drivers/firmware/efi/efi.c b/drivers/firmware/efi/efi.c
index df3f9bcab581..4b7ee3fa9224 100644
--- a/drivers/firmware/efi/efi.c
+++ b/drivers/firmware/efi/efi.c
@@ -927,7 +927,7 @@ int __ref efi_mem_reserve_persistent(phys_addr_t addr, u64 size)
}
/* first try to find a slot in an existing linked list entry */
- for (prsv = efi_memreserve_root->next; prsv; prsv = rsv->next) {
+ for (prsv = efi_memreserve_root->next; prsv; ) {
rsv = memremap(prsv, sizeof(*rsv), MEMREMAP_WB);
index = atomic_fetch_add_unless(&rsv->count, 1, rsv->size);
if (index < rsv->size) {
@@ -937,6 +937,7 @@ int __ref efi_mem_reserve_persistent(phys_addr_t addr, u64 size)
memunmap(rsv);
return efi_mem_reserve_iomem(addr, size);
}
+ prsv = rsv->next;
memunmap(rsv);
}
diff --git a/drivers/firmware/efi/vars.c b/drivers/firmware/efi/vars.c
index 41c1d00bf933..abdc8a6a3963 100644
--- a/drivers/firmware/efi/vars.c
+++ b/drivers/firmware/efi/vars.c
@@ -485,6 +485,10 @@ int efivar_init(int (*func)(efi_char16_t *, efi_guid_t, unsigned long, void *),
}
break;
+ case EFI_UNSUPPORTED:
+ err = -EOPNOTSUPP;
+ status = EFI_NOT_FOUND;
+ break;
case EFI_NOT_FOUND:
break;
default:
diff --git a/include/linux/efi.h b/include/linux/efi.h
index 8710f5710c1d..6b5d36babfcc 100644
--- a/include/linux/efi.h
+++ b/include/linux/efi.h
@@ -72,8 +72,10 @@ typedef void *efi_handle_t;
*/
typedef guid_t efi_guid_t __aligned(__alignof__(u32));
-#define EFI_GUID(a,b,c,d0,d1,d2,d3,d4,d5,d6,d7) \
- GUID_INIT(a, b, c, d0, d1, d2, d3, d4, d5, d6, d7)
+#define EFI_GUID(a, b, c, d...) (efi_guid_t){ { \
+ (a) & 0xff, ((a) >> 8) & 0xff, ((a) >> 16) & 0xff, ((a) >> 24) & 0xff, \
+ (b) & 0xff, ((b) >> 8) & 0xff, \
+ (c) & 0xff, ((c) >> 8) & 0xff, d } }
/*
* Generic EFI table header