diff options
| author | Radim Krčmář <rkrcmar@redhat.com> | 2017-09-08 14:40:43 +0200 |
|---|---|---|
| committer | Radim Krčmář <rkrcmar@redhat.com> | 2017-09-08 14:40:43 +0200 |
| commit | 5f54c8b2d4fad95d1f8ecbe023ebe6038e6d3760 (patch) | |
| tree | daca83ea5f9af1bd158504bd0b5af89c5a99b7fa /drivers/video/fbdev/efifb.c | |
| parent | 78809a68490d84eb632a215be2121d4b44c86954 (diff) | |
| parent | edd03602d97236e8fea13cd76886c576186aa307 (diff) | |
Merge branch 'kvm-ppc-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/paulus/powerpc
This fix was intended for 4.13, but didn't get in because both
maintainers were on vacation.
Paul Mackerras:
"It adds mutual exclusion between list_add_rcu and list_del_rcu calls
on the kvm->arch.spapr_tce_tables list. Without this, userspace could
potentially trigger corruption of the list and cause a host crash or
worse."
Diffstat (limited to 'drivers/video/fbdev/efifb.c')
| -rw-r--r-- | drivers/video/fbdev/efifb.c | 8 |
1 files changed, 7 insertions, 1 deletions
diff --git a/drivers/video/fbdev/efifb.c b/drivers/video/fbdev/efifb.c index ff01bed7112f..1e784adb89b1 100644 --- a/drivers/video/fbdev/efifb.c +++ b/drivers/video/fbdev/efifb.c @@ -17,6 +17,7 @@ #include <asm/efi.h> static bool request_mem_succeeded = false; +static bool nowc = false; static struct fb_var_screeninfo efifb_defined = { .activate = FB_ACTIVATE_NOW, @@ -99,6 +100,8 @@ static int efifb_setup(char *options) screen_info.lfb_height = simple_strtoul(this_opt+7, NULL, 0); else if (!strncmp(this_opt, "width:", 6)) screen_info.lfb_width = simple_strtoul(this_opt+6, NULL, 0); + else if (!strcmp(this_opt, "nowc")) + nowc = true; } } @@ -255,7 +258,10 @@ static int efifb_probe(struct platform_device *dev) info->apertures->ranges[0].base = efifb_fix.smem_start; info->apertures->ranges[0].size = size_remap; - info->screen_base = ioremap_wc(efifb_fix.smem_start, efifb_fix.smem_len); + if (nowc) + info->screen_base = ioremap(efifb_fix.smem_start, efifb_fix.smem_len); + else + info->screen_base = ioremap_wc(efifb_fix.smem_start, efifb_fix.smem_len); if (!info->screen_base) { pr_err("efifb: abort, cannot ioremap video memory 0x%x @ 0x%lx\n", efifb_fix.smem_len, efifb_fix.smem_start); |