Re: [PATCH v3 1/5] ALSA: emu10k1: remove reserved_page

2018-02-13 Thread Takashi Iwai
On Wed, 14 Feb 2018 00:04:58 +0100, Maciej S. Szmigiero wrote: > > The emu10k1-family chips need the first page (index 0) reserved in their > page tables for some reason (every emu10k1 driver I've checked does this > without much of an explanation). > Using the first page for normal samples resu

[PATCH v3 1/5] ALSA: emu10k1: remove reserved_page

2018-02-13 Thread Maciej S. Szmigiero
The emu10k1-family chips need the first page (index 0) reserved in their page tables for some reason (every emu10k1 driver I've checked does this without much of an explanation). Using the first page for normal samples results in a broken playback. However, we already have a dummy page allocated -