c27e8c5918
Modules: EMU10K1/EMU10K2 driver Thou shalt not dereference freed memory. Coverity bug #958 Signed-off-by: Dave Jones <davej@redhat.com> Signed-off-by: Takashi Iwai <tiwai@suse.de>
121 lines
3.1 KiB
C
121 lines
3.1 KiB
C
/*
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* Copyright (C) 2000 Takashi Iwai <tiwai@suse.de>
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*
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* Routines for control of EMU10K1 WaveTable synth
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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*/
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#include "emu10k1_synth_local.h"
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#include <linux/init.h>
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MODULE_AUTHOR("Takashi Iwai");
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MODULE_DESCRIPTION("Routines for control of EMU10K1 WaveTable synth");
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MODULE_LICENSE("GPL");
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/*
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* create a new hardware dependent device for Emu10k1
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*/
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static int snd_emu10k1_synth_new_device(struct snd_seq_device *dev)
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{
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struct snd_emux *emu;
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struct snd_emu10k1 *hw;
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struct snd_emu10k1_synth_arg *arg;
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unsigned long flags;
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arg = SNDRV_SEQ_DEVICE_ARGPTR(dev);
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if (arg == NULL)
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return -EINVAL;
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if (arg->seq_ports <= 0)
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return 0; /* nothing */
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if (arg->max_voices < 1)
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arg->max_voices = 1;
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else if (arg->max_voices > 64)
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arg->max_voices = 64;
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if (snd_emux_new(&emu) < 0)
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return -ENOMEM;
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snd_emu10k1_ops_setup(emu);
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emu->hw = hw = arg->hwptr;
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emu->max_voices = arg->max_voices;
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emu->num_ports = arg->seq_ports;
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emu->pitch_shift = -501;
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emu->memhdr = hw->memhdr;
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emu->midi_ports = arg->seq_ports < 2 ? arg->seq_ports : 2; /* maximum two ports */
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emu->midi_devidx = hw->audigy ? 2 : 1; /* audigy has two external midis */
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emu->linear_panning = 0;
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emu->hwdep_idx = 2; /* FIXED */
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if (snd_emux_register(emu, dev->card, arg->index, "Emu10k1") < 0) {
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snd_emux_free(emu);
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return -ENOMEM;
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}
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spin_lock_irqsave(&hw->voice_lock, flags);
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hw->synth = emu;
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hw->get_synth_voice = snd_emu10k1_synth_get_voice;
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spin_unlock_irqrestore(&hw->voice_lock, flags);
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dev->driver_data = emu;
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return 0;
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}
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static int snd_emu10k1_synth_delete_device(struct snd_seq_device *dev)
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{
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struct snd_emux *emu;
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struct snd_emu10k1 *hw;
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unsigned long flags;
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if (dev->driver_data == NULL)
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return 0; /* not registered actually */
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emu = dev->driver_data;
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hw = emu->hw;
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spin_lock_irqsave(&hw->voice_lock, flags);
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hw->synth = NULL;
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hw->get_synth_voice = NULL;
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spin_unlock_irqrestore(&hw->voice_lock, flags);
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snd_emux_free(emu);
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return 0;
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}
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/*
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* INIT part
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*/
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static int __init alsa_emu10k1_synth_init(void)
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{
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static struct snd_seq_dev_ops ops = {
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snd_emu10k1_synth_new_device,
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snd_emu10k1_synth_delete_device,
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};
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return snd_seq_device_register_driver(SNDRV_SEQ_DEV_ID_EMU10K1_SYNTH, &ops,
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sizeof(struct snd_emu10k1_synth_arg));
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}
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static void __exit alsa_emu10k1_synth_exit(void)
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{
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snd_seq_device_unregister_driver(SNDRV_SEQ_DEV_ID_EMU10K1_SYNTH);
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}
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module_init(alsa_emu10k1_synth_init)
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module_exit(alsa_emu10k1_synth_exit)
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