On Mon, 04 Nov 2013, ville.syrjala at linux.intel.com wrote:
> From: Ville Syrj?l? <ville.syrjala at linux.intel.com>
>
> While we can now call drm_sysfs_connector_remove() even if
> drm_connector_sysfs_add() failed, it would seem better for
> the user to know that something went wrong. So instead of
> ignoring drm_sysfs_connector_add() return value, checl it
> and fail the whole connector registration.
I think I'd rather see a cleanup of the init time fail paths first,
using the regular kernel goto style. Which I also don't think should be
a huge priority. Whaddaya think?
Cheers,
Jani.
>
> Signed-off-by: Ville Syrj?l? <ville.syrjala at linux.intel.com>
> ---
> drivers/gpu/drm/i915/intel_crt.c | 10 +++++++++-
> drivers/gpu/drm/i915/intel_ddi.c | 5 ++++-
> drivers/gpu/drm/i915/intel_dp.c | 6 +++++-
> drivers/gpu/drm/i915/intel_drv.h | 2 +-
> drivers/gpu/drm/i915/intel_dsi.c | 9 ++++++++-
> drivers/gpu/drm/i915/intel_dvo.c | 8 +++++++-
> drivers/gpu/drm/i915/intel_hdmi.c | 16 +++++++++++++---
> drivers/gpu/drm/i915/intel_lvds.c | 7 ++++++-
> drivers/gpu/drm/i915/intel_sdvo.c | 36 +++++++++++++++++++++++++++++-------
> drivers/gpu/drm/i915/intel_tv.c | 10 +++++++++-
> 10 files changed, 91 insertions(+), 18 deletions(-)
>
> diff --git a/drivers/gpu/drm/i915/intel_crt.c
> b/drivers/gpu/drm/i915/intel_crt.c
> index 2e01bd3..be8a024 100644
> --- a/drivers/gpu/drm/i915/intel_crt.c
> +++ b/drivers/gpu/drm/i915/intel_crt.c
> @@ -773,6 +773,7 @@ void intel_crt_init(struct drm_device *dev)
> struct intel_crt *crt;
> struct intel_connector *intel_connector;
> struct drm_i915_private *dev_priv = dev->dev_private;
> + int error;
>
> /* Skip machines without VGA that falsely report hotplug events */
> if (dmi_check_system(intel_no_crt))
> @@ -836,7 +837,14 @@ void intel_crt_init(struct drm_device *dev)
>
> drm_connector_helper_add(connector, &intel_crt_connector_helper_funcs);
>
> - drm_sysfs_connector_add(connector);
> + error = drm_sysfs_connector_add(connector);
> + if (error) {
> + drm_encoder_cleanup(&crt->base.base);
> + drm_connector_cleanup(connector);
> + kfree(intel_connector);
> + kfree(crt);
> + return;
> + }
>
> if (!I915_HAS_HOTPLUG(dev))
> intel_connector->polled = DRM_CONNECTOR_POLL_CONNECT;
> diff --git a/drivers/gpu/drm/i915/intel_ddi.c
> b/drivers/gpu/drm/i915/intel_ddi.c
> index 31f4fe2..687e333 100644
> --- a/drivers/gpu/drm/i915/intel_ddi.c
> +++ b/drivers/gpu/drm/i915/intel_ddi.c
> @@ -1375,7 +1375,10 @@ intel_ddi_init_hdmi_connector(struct
> intel_digital_port *intel_dig_port)
> return NULL;
>
> intel_dig_port->hdmi.hdmi_reg = DDI_BUF_CTL(port);
> - intel_hdmi_init_connector(intel_dig_port, connector);
> + if (!intel_hdmi_init_connector(intel_dig_port, connector)) {
> + kfree(connector);
> + return NULL;
> + }
>
> return connector;
> }
> diff --git a/drivers/gpu/drm/i915/intel_dp.c b/drivers/gpu/drm/i915/intel_dp.c
> index c8515bb..eb01be7 100644
> --- a/drivers/gpu/drm/i915/intel_dp.c
> +++ b/drivers/gpu/drm/i915/intel_dp.c
> @@ -3603,7 +3603,11 @@ intel_dp_init_connector(struct intel_digital_port
> *intel_dig_port,
> ironlake_panel_vdd_work);
>
> intel_connector_attach_encoder(intel_connector, intel_encoder);
> - drm_sysfs_connector_add(connector);
> + error = drm_sysfs_connector_add(connector);
> + if (error) {
> + drm_connector_cleanup(connector);
> + return false;
> + }
>
> if (HAS_DDI(dev))
> intel_connector->get_hw_state =
> intel_ddi_connector_get_hw_state;
> diff --git a/drivers/gpu/drm/i915/intel_drv.h
> b/drivers/gpu/drm/i915/intel_drv.h
> index 9d2624f..a944d6e 100644
> --- a/drivers/gpu/drm/i915/intel_drv.h
> +++ b/drivers/gpu/drm/i915/intel_drv.h
> @@ -760,7 +760,7 @@ static inline void intel_fbdev_restore_mode(struct
> drm_device *dev)
>
> /* intel_hdmi.c */
> void intel_hdmi_init(struct drm_device *dev, int hdmi_reg, enum port port);
> -void intel_hdmi_init_connector(struct intel_digital_port *intel_dig_port,
> +bool intel_hdmi_init_connector(struct intel_digital_port *intel_dig_port,
> struct intel_connector *intel_connector);
> struct intel_hdmi *enc_to_intel_hdmi(struct drm_encoder *encoder);
> bool intel_hdmi_compute_config(struct intel_encoder *encoder,
> diff --git a/drivers/gpu/drm/i915/intel_dsi.c
> b/drivers/gpu/drm/i915/intel_dsi.c
> index d257b09..16684b5 100644
> --- a/drivers/gpu/drm/i915/intel_dsi.c
> +++ b/drivers/gpu/drm/i915/intel_dsi.c
> @@ -535,6 +535,7 @@ bool intel_dsi_init(struct drm_device *dev)
> struct drm_display_mode *fixed_mode = NULL;
> const struct intel_dsi_device *dsi;
> unsigned int i;
> + int error;
>
> DRM_DEBUG_KMS("\n");
>
> @@ -598,11 +599,17 @@ bool intel_dsi_init(struct drm_device *dev)
>
> intel_connector_attach_encoder(intel_connector, intel_encoder);
>
> - drm_sysfs_connector_add(connector);
> + error = drm_sysfs_connector_add(connector);
> + if (error) {
> + drm_connector_cleanup(connector);
> + goto err;
> + }
>
> fixed_mode = dsi->dev_ops->get_modes(&intel_dsi->dev);
> if (!fixed_mode) {
> DRM_DEBUG_KMS("no fixed mode\n");
> + drm_sysfs_connector_remove(connector);
> + drm_connector_cleanup(connector);
> goto err;
> }
>
> diff --git a/drivers/gpu/drm/i915/intel_dvo.c
> b/drivers/gpu/drm/i915/intel_dvo.c
> index 3c77365..439e9d9 100644
> --- a/drivers/gpu/drm/i915/intel_dvo.c
> +++ b/drivers/gpu/drm/i915/intel_dvo.c
> @@ -484,6 +484,7 @@ void intel_dvo_init(struct drm_device *dev)
> struct i2c_adapter *i2c;
> int gpio;
> bool dvoinit;
> + int error;
>
> /* Allow the I2C driver info to specify the GPIO to be used in
> * special cases, but otherwise default to what's defined
> @@ -555,7 +556,12 @@ void intel_dvo_init(struct drm_device *dev)
> intel_dvo->panel_wants_dither = true;
> }
>
> - drm_sysfs_connector_add(connector);
> + error = drm_sysfs_connector_add(connector);
> + if (error) {
> + drm_connector_cleanup(connector);
> + break;
> + }
> +
> return;
> }
>
> diff --git a/drivers/gpu/drm/i915/intel_hdmi.c
> b/drivers/gpu/drm/i915/intel_hdmi.c
> index 51a8336..f8ee5ca 100644
> --- a/drivers/gpu/drm/i915/intel_hdmi.c
> +++ b/drivers/gpu/drm/i915/intel_hdmi.c
> @@ -1211,7 +1211,7 @@ intel_hdmi_add_properties(struct intel_hdmi
> *intel_hdmi, struct drm_connector *c
> intel_hdmi->color_range_auto = true;
> }
>
> -void intel_hdmi_init_connector(struct intel_digital_port *intel_dig_port,
> +bool intel_hdmi_init_connector(struct intel_digital_port *intel_dig_port,
> struct intel_connector *intel_connector)
> {
> struct drm_connector *connector = &intel_connector->base;
> @@ -1220,6 +1220,7 @@ void intel_hdmi_init_connector(struct
> intel_digital_port *intel_dig_port,
> struct drm_device *dev = intel_encoder->base.dev;
> struct drm_i915_private *dev_priv = dev->dev_private;
> enum port port = intel_dig_port->port;
> + int error;
>
> drm_connector_init(dev, connector, &intel_hdmi_connector_funcs,
> DRM_MODE_CONNECTOR_HDMIA);
> @@ -1274,7 +1275,11 @@ void intel_hdmi_init_connector(struct
> intel_digital_port *intel_dig_port,
> intel_hdmi_add_properties(intel_hdmi, connector);
>
> intel_connector_attach_encoder(intel_connector, intel_encoder);
> - drm_sysfs_connector_add(connector);
> + error = drm_sysfs_connector_add(connector);
> + if (error) {
> + drm_connector_cleanup(connector);
> + return false;
> + }
>
> /* For G4X desktop chip, PEG_BAND_GAP_DATA 3:0 must first be written
> * 0xd. Failure to do so will result in spurious interrupts being
> @@ -1284,6 +1289,8 @@ void intel_hdmi_init_connector(struct
> intel_digital_port *intel_dig_port,
> u32 temp = I915_READ(PEG_BAND_GAP_DATA);
> I915_WRITE(PEG_BAND_GAP_DATA, (temp & ~0xf) | 0xd);
> }
> +
> + return true;
> }
>
> void intel_hdmi_init(struct drm_device *dev, int hdmi_reg, enum port port)
> @@ -1329,5 +1336,8 @@ void intel_hdmi_init(struct drm_device *dev, int
> hdmi_reg, enum port port)
> intel_dig_port->hdmi.hdmi_reg = hdmi_reg;
> intel_dig_port->dp.output_reg = 0;
>
> - intel_hdmi_init_connector(intel_dig_port, intel_connector);
> + if (!intel_hdmi_init_connector(intel_dig_port, intel_connector)) {
> + drm_encoder_cleanup(&intel_encoder->base);
> + return;
> + }
> }
> diff --git a/drivers/gpu/drm/i915/intel_lvds.c
> b/drivers/gpu/drm/i915/intel_lvds.c
> index b0ef558..a358a5e 100644
> --- a/drivers/gpu/drm/i915/intel_lvds.c
> +++ b/drivers/gpu/drm/i915/intel_lvds.c
> @@ -941,6 +941,7 @@ void intel_lvds_init(struct drm_device *dev)
> u32 lvds;
> int pipe;
> u8 pin;
> + int error;
>
> if (!intel_lvds_supported(dev))
> return;
> @@ -1137,7 +1138,11 @@ out:
> DRM_DEBUG_KMS("lid notifier registration failed\n");
> lvds_connector->lid_notifier.notifier_call = NULL;
> }
> - drm_sysfs_connector_add(connector);
> + error = drm_sysfs_connector_add(connector);
> + if (error) {
> + acpi_lid_notifier_unregister(&lvds_connector->lid_notifier);
> + goto failed;
> + }
>
> intel_panel_init(&intel_connector->panel, fixed_mode);
> intel_panel_setup_backlight(connector);
> diff --git a/drivers/gpu/drm/i915/intel_sdvo.c
> b/drivers/gpu/drm/i915/intel_sdvo.c
> index a583e8f..23d758e 100644
> --- a/drivers/gpu/drm/i915/intel_sdvo.c
> +++ b/drivers/gpu/drm/i915/intel_sdvo.c
> @@ -2361,10 +2361,12 @@ intel_sdvo_get_slave_addr(struct drm_device *dev,
> struct intel_sdvo *sdvo)
> return 0x72;
> }
>
> -static void
> +static bool
> intel_sdvo_connector_init(struct intel_sdvo_connector *connector,
> struct intel_sdvo *encoder)
> {
> + int error;
> +
> drm_connector_init(encoder->base.base.dev,
> &connector->base.base,
> &intel_sdvo_connector_funcs,
> @@ -2379,7 +2381,13 @@ intel_sdvo_connector_init(struct intel_sdvo_connector
> *connector,
> connector->base.get_hw_state = intel_sdvo_connector_get_hw_state;
>
> intel_connector_attach_encoder(&connector->base, &encoder->base);
> - drm_sysfs_connector_add(&connector->base.base);
> + error = drm_sysfs_connector_add(&connector->base.base);
> + if (error) {
> + drm_connector_cleanup(&connector->base.base);
> + return false;
> + }
> +
> + return true;
> }
>
> static void
> @@ -2439,7 +2447,11 @@ intel_sdvo_dvi_init(struct intel_sdvo *intel_sdvo, int
> device)
> intel_sdvo->is_hdmi = true;
> }
>
> - intel_sdvo_connector_init(intel_sdvo_connector, intel_sdvo);
> + if (!intel_sdvo_connector_init(intel_sdvo_connector, intel_sdvo)) {
> + kfree(intel_sdvo_connector);
> + return false;
> + }
> +
> if (intel_sdvo->is_hdmi)
> intel_sdvo_add_hdmi_properties(intel_sdvo,
> intel_sdvo_connector);
>
> @@ -2470,7 +2482,10 @@ intel_sdvo_tv_init(struct intel_sdvo *intel_sdvo, int
> type)
>
> intel_sdvo->is_tv = true;
>
> - intel_sdvo_connector_init(intel_sdvo_connector, intel_sdvo);
> + if (!intel_sdvo_connector_init(intel_sdvo_connector, intel_sdvo)) {
> + kfree(intel_sdvo_connector);
> + return false;
> + }
>
> if (!intel_sdvo_tv_create_property(intel_sdvo, intel_sdvo_connector,
> type))
> goto err;
> @@ -2514,8 +2529,11 @@ intel_sdvo_analog_init(struct intel_sdvo *intel_sdvo,
> int device)
> intel_sdvo_connector->output_flag = SDVO_OUTPUT_RGB1;
> }
>
> - intel_sdvo_connector_init(intel_sdvo_connector,
> - intel_sdvo);
> + if (!intel_sdvo_connector_init(intel_sdvo_connector, intel_sdvo)) {
> + kfree(intel_sdvo_connector);
> + return false;
> + }
> +
> return true;
> }
>
> @@ -2546,7 +2564,11 @@ intel_sdvo_lvds_init(struct intel_sdvo *intel_sdvo,
> int device)
> intel_sdvo_connector->output_flag = SDVO_OUTPUT_LVDS1;
> }
>
> - intel_sdvo_connector_init(intel_sdvo_connector, intel_sdvo);
> + if (!intel_sdvo_connector_init(intel_sdvo_connector, intel_sdvo)) {
> + kfree(intel_sdvo_connector);
> + return false;
> + }
> +
> if (!intel_sdvo_create_enhance_property(intel_sdvo,
> intel_sdvo_connector))
> goto err;
>
> diff --git a/drivers/gpu/drm/i915/intel_tv.c b/drivers/gpu/drm/i915/intel_tv.c
> index 18c4062..c1e66f6 100644
> --- a/drivers/gpu/drm/i915/intel_tv.c
> +++ b/drivers/gpu/drm/i915/intel_tv.c
> @@ -1554,6 +1554,7 @@ intel_tv_init(struct drm_device *dev)
> u32 tv_dac_on, tv_dac_off, save_tv_dac;
> char *tv_format_names[ARRAY_SIZE(tv_modes)];
> int i, initial_mode = 0;
> + int error;
>
> if ((I915_READ(TV_CTL) & TV_FUSE_STATE_MASK) == TV_FUSE_STATE_DISABLED)
> return;
> @@ -1668,5 +1669,12 @@ intel_tv_init(struct drm_device *dev)
> drm_object_attach_property(&connector->base,
> dev->mode_config.tv_bottom_margin_property,
> intel_tv->margin[TV_MARGIN_BOTTOM]);
> - drm_sysfs_connector_add(connector);
> + error = drm_sysfs_connector_add(connector);
> + if (error) {
> + drm_connector_cleanup(connector);
> + drm_encoder_cleanup(&intel_encoder->base);
> + kfree(intel_connector);
> + kfree(intel_tv);
> + return;
> + }
> }
> --
> 1.8.1.5
>
> _______________________________________________
> dri-devel mailing list
> dri-devel at lists.freedesktop.org
> http://lists.freedesktop.org/mailman/listinfo/dri-devel
--
Jani Nikula, Intel Open Source Technology Center
