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authorHans de Goede <hdegoede@redhat.com>2019-05-29 15:28:28 +0200
committerGreg Kroah-Hartman <gregkh@linuxfoundation.org>2019-07-21 09:04:38 +0200
commit555c2ac63cadf2494a129e512b121c0bf63209fb (patch)
tree09331f42afd9949ff526d2d5b1c967a5454287d1 /drivers/firmware
parent01894d27130c0f7aaf03fce673bcf8d1515b0841 (diff)
efi/bgrt: Drop BGRT status field reserved bits check
[ Upstream commit a483fcab38b43fb34a7f12ab1daadd3907f150e2 ] Starting with ACPI 6.2 bits 1 and 2 of the BGRT status field are no longer reserved. These bits are now used to indicate if the image needs to be rotated before being displayed. The first device using these bits has now shown up (the GPD MicroPC) and the reserved bits check causes us to reject the valid BGRT table on this device. Rather then changing the reserved bits check, allowing only the 2 new bits, instead just completely remove it so that we do not end up with a similar problem when more bits are added in the future. Signed-off-by: Hans de Goede <hdegoede@redhat.com> Signed-off-by: Ard Biesheuvel <ard.biesheuvel@linaro.org> Signed-off-by: Sasha Levin <sashal@kernel.org>
Diffstat (limited to 'drivers/firmware')
-rw-r--r--drivers/firmware/efi/efi-bgrt.c5
1 files changed, 0 insertions, 5 deletions
diff --git a/drivers/firmware/efi/efi-bgrt.c b/drivers/firmware/efi/efi-bgrt.c
index 50793fda7819..e3d86aa1ad5d 100644
--- a/drivers/firmware/efi/efi-bgrt.c
+++ b/drivers/firmware/efi/efi-bgrt.c
@@ -50,11 +50,6 @@ void __init efi_bgrt_init(struct acpi_table_header *table)
bgrt->version);
goto out;
}
- if (bgrt->status & 0xfe) {
- pr_notice("Ignoring BGRT: reserved status bits are non-zero %u\n",
- bgrt->status);
- goto out;
- }
if (bgrt->image_type != 0) {
pr_notice("Ignoring BGRT: invalid image type %u (expected 0)\n",
bgrt->image_type);