drm/i915: drop write perm from module params which don't support changing

We've given write permissions to dynamically change some module
parameters through /sys/module/i915/parameters although they only
support setting on module load. Fix the permissions.

Reviewed-by: Daniel Vetter <daniel.vetter@ffwll.ch>
Signed-off-by: Jani Nikula <jani.nikula@intel.com>
Link: http://patchwork.freedesktop.org/patch/msgid/1455621493-6865-1-git-send-email-jani.nikula@intel.com

diff --git a/drivers/gpu/drm/i915/i915_params.c b/drivers/gpu/drm/i915/i915_params.c
index 1b40ee67e0ed0c1e775285d341e156bd23616619..fd2e2fbc44d589b6085867d6c43fe797025fb2d8 100644 (file)
--- a/drivers/gpu/drm/i915/i915_params.c
+++ b/drivers/gpu/drm/i915/i915_params.c
@@ -92,7 +92,7 @@ MODULE_PARM_DESC(enable_fbc,
        "Enable frame buffer compression for power savings "
        "(default: -1 (use per-chip default))");
 
-module_param_named_unsafe(lvds_channel_mode, i915.lvds_channel_mode, int, 0600);
+module_param_named_unsafe(lvds_channel_mode, i915.lvds_channel_mode, int, 0400);
 MODULE_PARM_DESC(lvds_channel_mode,
         "Specify LVDS channel mode "
         "(0=probe BIOS [default], 1=single-channel, 2=dual-channel)");
@@ -102,7 +102,7 @@ MODULE_PARM_DESC(lvds_use_ssc,
        "Use Spread Spectrum Clock with panels [LVDS/eDP] "
        "(default: auto from VBT)");
 
-module_param_named_unsafe(vbt_sdvo_panel_type, i915.vbt_sdvo_panel_type, int, 0600);
+module_param_named_unsafe(vbt_sdvo_panel_type, i915.vbt_sdvo_panel_type, int, 0400);
 MODULE_PARM_DESC(vbt_sdvo_panel_type,
        "Override/Ignore selection of SDVO panel mode in the VBT "
        "(-2=ignore, -1=auto [default], index in VBT BIOS table)");
@@ -131,7 +131,7 @@ MODULE_PARM_DESC(enable_psr, "Enable PSR "
                 "(0=disabled, 1=enabled - link mode chosen per-platform, 2=force link-standby mode, 3=force link-off mode) "
                 "Default: -1 (use per-chip default)");
 
-module_param_named_unsafe(preliminary_hw_support, i915.preliminary_hw_support, int, 0600);
+module_param_named_unsafe(preliminary_hw_support, i915.preliminary_hw_support, int, 0400);
 MODULE_PARM_DESC(preliminary_hw_support,
        "Enable preliminary hardware support.");
 
@@ -165,7 +165,7 @@ MODULE_PARM_DESC(invert_brightness,
        "to dri-devel@lists.freedesktop.org, if your machine needs it. "
        "It will then be included in an upcoming module version.");
 
-module_param_named(disable_display, i915.disable_display, bool, 0600);
+module_param_named(disable_display, i915.disable_display, bool, 0400);
 MODULE_PARM_DESC(disable_display, "Disable display (default: false)");
 
 module_param_named_unsafe(disable_vtd_wa, i915.disable_vtd_wa, bool, 0600);