Re: [PATCH RESEND 1/3] drm/i915: use error path

Daniel Vetter
2015-10-08T14:27:30Z

On Thu, Oct 08, 2015 at 07:27:59PM +0530, Sudip Mukherjee wrote:
> Use goto to handle the error path to avoid duplicating the same code. In
> the error path intel_dig_port is the last one to be released as it was
> the first one to be allocated and ideally the error path should be the
> reverse of the execution path.
>
> Cc: Daniel Vetter <daniel.vetter@intel.com>
> Cc: Jani Nikula <jani.nikula@linux.intel.com>
> Signed-off-by: Sudip Mukherjee <sudip@vectorindia.org>

Queued for -next, thanks for the patch.
-Daniel

> ---
>
> Sent on 27/07/2015
>
> drivers/gpu/drm/i915/intel_dp.c | 23 ++++++++++++++---------
> 1 file changed, 14 insertions(+), 9 deletions(-)
>
> diff --git a/drivers/gpu/drm/i915/intel_dp.c b/drivers/gpu/drm/i915/intel_dp.c
> index 8d34ca7..18bcfbe 100644
> --- a/drivers/gpu/drm/i915/intel_dp.c
> +++ b/drivers/gpu/drm/i915/intel_dp.c
> @@ -6168,10 +6168,8 @@ intel_dp_init(struct drm_device *dev, int output_reg, enum port port)
> return;
>
> intel_connector = intel_connector_alloc();
> - if (!intel_connector) {
> - kfree(intel_dig_port);
> - return;
> - }
> + if (!intel_connector)
> + goto err_connector_alloc;
>
> intel_encoder = &intel_dig_port->base;
> encoder = &intel_encoder->base;
> @@ -6219,11 +6217,18 @@ intel_dp_init(struct drm_device *dev, int output_reg, enum port port)
> intel_dig_port->hpd_pulse = intel_dp_hpd_pulse;
> dev_priv->hotplug.irq_port[port] = intel_dig_port;
>
> - if (!intel_dp_init_connector(intel_dig_port, intel_connector)) {
> - drm_encoder_cleanup(encoder);
> - kfree(intel_dig_port);
> - kfree(intel_connector);
> - }
> + if (!intel_dp_init_connector(intel_dig_port, intel_connector))
> + goto err_init_connector;
> +
> + return;
> +
> +err_init_connector:
> + drm_encoder_cleanup(encoder);
> + kfree(intel_connector);
> +err_connector_alloc:
> + kfree(intel_dig_port);
> +
> + return;
> }
>
> void intel_dp_mst_suspend(struct drm_device *dev)
> --
> 1.9.1