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When SND_HDA_PREALLOC_SIZE is set to 0, applications can request as much memory as there is allowed. With value of AZX_MAX_BUF_SIZE it is 1GB per stream, which is not realistic use case. Change it 4MB. Bug: https://bugzilla.kernel.org/show_bug.cgi?id=201251#c322 Suggested-by: Takashi Iwai <tiwai@suse.de> Reviewed-by: Cezary Rojewski <cezary.rojewski@intel.com> Signed-off-by: Amadeusz Sławiński <amadeuszx.slawinski@linux.intel.com> Link: https://lore.kernel.org/r/20210318160618.2504068-3-amadeuszx.slawinski@linux.intel.com Signed-off-by: Takashi Iwai <tiwai@suse.de>