fbdev: tcx.c fix mem_map to correct smem_start offset

commit 35fa2b4bf96415b88d7edaa5cf8af5185d9ce76e upstream.

403ae52ac047 ("sparc: fix drivers/video/tcx.c warning") changed the
physbase initializing breaking the user-space mmap, e.g. for Xorg
entirely.

Fix fbdev mmap table so the sbus mmap helper work correctly, and
not try to map vastly (physbase) offset memory.

Fixes: 403ae52ac047 ("sparc: fix drivers/video/tcx.c warning")
Cc: <stable@vger.kernel.org>
Signed-off-by: René Rebe <rene@exactco.de>
Signed-off-by: Helge Deller <deller@gmx.de>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

diff --git a/drivers/video/fbdev/tcx.c b/drivers/video/fbdev/tcx.c
index 34b2e5b6e84a13d68760b069892c4011b53f55b4..befbea63e5878a817326b057e272ed7d9abf1422 100644 (file)
--- a/drivers/video/fbdev/tcx.c
+++ b/drivers/video/fbdev/tcx.c
@@ -436,7 +436,7 @@ static int tcx_probe(struct platform_device *op)
                        j = i;
                        break;
                }
-               par->mmap_map[i].poff = op->resource[j].start;
+               par->mmap_map[i].poff = op->resource[j].start - info->fix.smem_start;
        }
 
        info->flags = FBINFO_DEFAULT;