Distribution installation images such as Debian include different sets of modules which can be downloaded dynamically. Such images may notably include the hda sound modules but not the i915 DRM module, even if the latter was enabled at build time, as reported on https://bugs.debian.org/931507

In such a case hdac_i915 would be linked in and try to load the i915 module, fail since it is not there, but still wait for a whole minute before giving up binding with it.

This fixes such as case by only waiting for the binding if the module was properly loaded (or module support is disabled, in which case i915 is already compiled-in anyway).

Signed-off-by: Samuel Thibault samuel.thibault@ens-lyon.org --- sound/hda/hdac_i915.c | 12 ++++++++---- 1 file changed, 8 insertions(+), 4 deletions(-)

--- a/sound/hda/hdac_i915.c +++ b/sound/hda/hdac_i915.c @@ -143,10 +143,14 @@ int snd_hdac_i915_init(struct hdac_bus * if (!acomp) return -ENODEV; if (!acomp->ops) { - request_module("i915"); - /* 60s timeout */ - wait_for_completion_timeout(&bind_complete, - msecs_to_jiffies(60 * 1000)); +#ifdef CONFIG_MODULES + if (request_module("i915") == 0) +#endif + { + /* 60s timeout */ + wait_for_completion_timeout(&bind_complete, + msecs_to_jiffies(60 * 1000)); + } } if (!acomp->ops) { dev_info(bus->dev, "couldn't bind with audio component\n");