On Fri, May 15, 2015 at 01:09:21PM +0300, Jani Nikula wrote:
> From: Mika Kuoppala <mika.kuopp...@linux.intel.com>
>
> Reading from disconnected ports will spit out timeout error
> on the dmesg. Skip the attempted read if the port is not
> connected and avoid confusing users/testcases about
> expected timeouts.
>
> This new dpcd debugfs entry was introduced by commit aa7471d228eb
> ("drm/i915: add i915 specific connector debugfs file for DPCD")
>
> v2 by Jani: move the check at the top, out of the loop.
>
> Bugzilla: https://bugs.freedesktop.org/show_bug.cgi?id=90060
> Tested-by: yex.t...@intel.com
> Cc: Jani Nikula <jani.nik...@intel.com>
> Cc: Bob Paauwe <bob.j.paa...@intel.com>
> Signed-off-by: Mika Kuoppala <mika.kuopp...@intel.com>
> Signed-off-by: Jani Nikula <jani.nik...@intel.com>
Queued for -next, thanks for the patch.
-Daniel
> ---
> drivers/gpu/drm/i915/i915_debugfs.c | 3 +++
> 1 file changed, 3 insertions(+)
>
> diff --git a/drivers/gpu/drm/i915/i915_debugfs.c
> b/drivers/gpu/drm/i915/i915_debugfs.c
> index adbbddab42c6..a32b669bab89 100644
> --- a/drivers/gpu/drm/i915/i915_debugfs.c
> +++ b/drivers/gpu/drm/i915/i915_debugfs.c
> @@ -5154,6 +5154,9 @@ static int i915_dpcd_show(struct seq_file *m, void
> *data)
> ssize_t err;
> int i;
>
> + if (connector->status != connector_status_connected)
> + return -ENODEV;
> +
> for (i = 0; i < ARRAY_SIZE(i915_dpcd_debug); i++) {
> const struct dpcd_block *b = &i915_dpcd_debug[i];
> size_t size = b->end ? b->end - b->offset + 1 : (b->size ?: 1);
> --
> 2.1.4
>
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--
Daniel Vetter
Software Engineer, Intel Corporation
http://blog.ffwll.ch
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