diff options
| author | Matt Fleming <matt.fleming@intel.com> | 2013-11-11 16:18:59 +0000 |
|---|---|---|
| committer | Matt Fleming <matt.fleming@intel.com> | 2013-11-28 20:16:56 +0000 |
| commit | 1f3a8bae21a22808f242ccfb22aca37a635e261e (patch) | |
| tree | 5dfda7039c62c9a6d6e156f12e1ba330d9a3b486 /arch/x86 | |
| parent | e0d59733f6b1796b8d6692642c87d7dd862c3e3a (diff) | |
| download | linux-1f3a8bae21a22808f242ccfb22aca37a635e261e.tar.bz2 | |
x86/efi: Fix earlyprintk off-by-one bug
Dave reported seeing the following incorrect output on his Thinkpad T420
when using earlyprintk=efi,
[ 0.000000] efi: EFI v2.00 by Lenovo
ACPI=0xdabfe000 ACPI 2.0=0xdabfe014 SMBIOS=0xdaa9e000
The output should be on one line, not split over two. The cause is an
off-by-one error when checking that the efi_y coordinate hasn't been
incremented out of bounds.
Reported-by: Dave Young <dyoung@redhat.com>
Signed-off-by: Matt Fleming <matt.fleming@intel.com>
Diffstat (limited to 'arch/x86')
| -rw-r--r-- | arch/x86/platform/efi/early_printk.c | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/arch/x86/platform/efi/early_printk.c b/arch/x86/platform/efi/early_printk.c index 6599a0027b76..81b506d5befd 100644 --- a/arch/x86/platform/efi/early_printk.c +++ b/arch/x86/platform/efi/early_printk.c @@ -142,7 +142,7 @@ early_efi_write(struct console *con, const char *str, unsigned int num) efi_y += font->height; } - if (efi_y + font->height >= si->lfb_height) { + if (efi_y + font->height > si->lfb_height) { u32 i; efi_y -= font->height; |