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Date:   Thu, 7 Dec 2017 15:50:22 +0000
To:     "" <>,
        "" <>
Cc:     Daniel Drake <>,
        Matt Fleming <>,
        Ard Biesheuvel <>,
Subject: [PATCH AUTOSEL for 4.4 045/101] efi/esrt: Cleanup bad memory map log

From: Daniel Drake <>

[ Upstream commit 822f5845f710e57d7e2df1fd1ee00d6e19d334fe ]

The Intel Compute Stick STCK1A8LFC and Weibu F3C platforms both
log 2 error messages during boot:

   efi: requested map not found.
   esrt: ESRT header is not in the memory map.

Searching the web, this seems to affect many other platforms too.
Since these messages are logged as errors, they appear on-screen during
the boot process even when using the "quiet" boot parameter used by

Demote the ESRT error to a warning so that it does not appear on-screen,
and delete the error logging from efi_mem_desc_lookup; both callsites
of that function log more specific messages upon failure.

Out of curiosity I looked closer at the Weibu F3C. There is no entry in
the UEFI-provided memory map which corresponds to the ESRT pointer, but
hacking the code to map it anyway, the ESRT does appear to be valid with
2 entries.

Signed-off-by: Daniel Drake <>
Cc: Matt Fleming <>
Acked-by: Peter Jones <>
Signed-off-by: Ard Biesheuvel <>
Signed-off-by: Sasha Levin <>
 drivers/firmware/efi/efi.c  | 1 -
 drivers/firmware/efi/esrt.c | 2 +-
 2 files changed, 1 insertion(+), 2 deletions(-)

diff --git a/drivers/firmware/efi/efi.c b/drivers/firmware/efi/efi.c
index 0cd8f039602e..d2a3b5885c44 100644
--- a/drivers/firmware/efi/efi.c
+++ b/drivers/firmware/efi/efi.c
@@ -311,7 +311,6 @@ int __init efi_mem_desc_lookup(u64 phys_addr, efi_memory_desc_t *out_md)
 		early_memunmap(md, sizeof (*md));
-	pr_err_once("requested map not found.\n");
 	return -ENOENT;
diff --git a/drivers/firmware/efi/esrt.c b/drivers/firmware/efi/esrt.c
index 22c5285f7705..3056b18943d0 100644
--- a/drivers/firmware/efi/esrt.c
+++ b/drivers/firmware/efi/esrt.c
@@ -256,7 +256,7 @@ void __init efi_esrt_init(void)
 	rc = efi_mem_desc_lookup(efi.esrt, &md);
 	if (rc < 0) {
-		pr_err("ESRT header is not in the memory map.\n");
+		pr_warn("ESRT header is not in the memory map.\n");

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