• Russell King's avatar
    ARM: footbridge: fix VGA initialisation · 43659222
    Russell King authored
    It's no good setting vga_base after the VGA console has been
    initialised, because if we do that we get this:
    
    Unable to handle kernel paging request at virtual address 000b8000
    pgd = c0004000
    [000b8000] *pgd=07ffc831, *pte=00000000, *ppte=00000000
    0Internal error: Oops: 5017 [#1] ARM
    Modules linked in:
    CPU: 0 PID: 0 Comm: swapper Not tainted 3.12.0+ #49
    task: c03e2974 ti: c03d8000 task.ti: c03d8000
    PC is at vgacon_startup+0x258/0x39c
    LR is at request_resource+0x10/0x1c
    pc : [<c01725d0>]    lr : [<c0022b50>]    psr: 60000053
    sp : c03d9f68  ip : 000b8000  fp : c03d9f8c
    r10: 000055aa  r9 : 4401a103  r8 : ffffaa55
    r7 : c03e357c  r6 : c051b460  r5 : 000000ff  r4 : 000c0000
    r3 : 000b8000  r2 : c03e0514  r1 : 00000000  r0 : c0304971
    Flags: nZCv  IRQs on  FIQs off  Mode SVC_32  ISA ARM  Segment kernel
    
    which is an access to the 0xb8000 without the PCI offset required to
    make it work.
    
    Fixes: cc22b4c1 ("ARM: set vga memory base at run-time")
    Signed-off-by: default avatarRussell King <rmk+kernel@arm.linux.org.uk>
    Cc: <stable@vger.kernel.org>
    43659222
dc21285.c 8.88 KB