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 4.4-stable tree which can be found at: http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git%3Ba=su...
The filename of the patch is: efi-esrt-cleanup-bad-memory-map-log-messages.patch and it can be found in the queue-4.4 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 14:47:43 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 @@ -310,7 +310,6 @@ int __init efi_mem_desc_lookup(u64 phys_
early_memunmap(md, sizeof (*md)); } - pr_err_once("requested map not found.\n"); return -ENOENT; }
--- a/drivers/firmware/efi/esrt.c +++ b/drivers/firmware/efi/esrt.c @@ -253,7 +253,7 @@ 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-4.4/efi-esrt-cleanup-bad-memory-map-log-messages.patch