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authorHans de Goede <hdegoede@redhat.com>2019-05-29 15:28:28 +0200
committerArd Biesheuvel <ard.biesheuvel@linaro.org>2019-06-11 16:13:05 +0200
commita483fcab38b43fb34a7f12ab1daadd3907f150e2 (patch)
treef190b16959ceb7587165c53651c853a98cd62ba7
parent18df7577adae6c6c778bf774b3aebcacbc1fb439 (diff)
efi/bgrt: Drop BGRT status field reserved bits check
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>
-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 a2384184a7de..b07c17643210 100644
--- a/drivers/firmware/efi/efi-bgrt.c
+++ b/drivers/firmware/efi/efi-bgrt.c
@@ -47,11 +47,6 @@ 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);