Patch "efi/esrt: Cleanup bad memory map log messages" has been added to the 4.9-stable tree

Patch "efi/esrt: Cleanup bad memory map log messages" has been added to the 4.9-stable tree

[gregkh]

This is a note to let you know that I've just added the patch titled

    efi/esrt: Cleanup bad memory map log messages

to the 4.9-stable tree which can be found at:
    http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary

The filename of the patch is:
     efi-esrt-cleanup-bad-memory-map-log-messages.patch
and it can be found in the queue-4.9 subdirectory.

If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@vger.kernel.org> know about it.


>From foo@baz Mon Dec 18 14:12:34 CET 2017
From: Daniel Drake <drake@endlessm.com>
Date: Tue, 7 Feb 2017 13:08:23 -0600
Subject: efi/esrt: Cleanup bad memory map log messages

From: Daniel Drake <drake@endlessm.com>


[ 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
distros.

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 <drake@endlessm.com>
Cc: Matt Fleming <matt@codeblueprint.co.uk>
Acked-by: Peter Jones <pjones@redhat.com>
Signed-off-by: Ard Biesheuvel <ard.biesheuvel@linaro.org>
Signed-off-by: Sasha Levin <alexander.levin@verizon.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
---
 drivers/firmware/efi/efi.c  |    1 -
 drivers/firmware/efi/esrt.c |    2 +-
 2 files changed, 1 insertion(+), 2 deletions(-)

--- a/drivers/firmware/efi/efi.c
+++ b/drivers/firmware/efi/efi.c
@@ -384,7 +384,6 @@ int __init efi_mem_desc_lookup(u64 phys_
 			return 0;
 		}
 	}
-	pr_err_once("requested map not found.\n");
 	return -ENOENT;
 }
 
--- a/drivers/firmware/efi/esrt.c
+++ b/drivers/firmware/efi/esrt.c
@@ -251,7 +251,7 @@ 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");
 		return;
 	}
 


Patches currently in stable-queue which might be from drake@endlessm.com are

queue-4.9/efi-esrt-cleanup-bad-memory-map-log-messages.patch