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b76c0e95ab
The snd_emux_free() function tests whether its argument is NULL and then returns immediately. Thus the test around the call is not needed. This issue was detected by using the Coccinelle software. Signed-off-by: Markus Elfring <elfring@users.sourceforge.net> Signed-off-by: Takashi Iwai <tiwai@suse.de>
135 lines
3.3 KiB
C
135 lines
3.3 KiB
C
/*
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* Copyright (c) by Jaroslav Kysela <perex@perex.cz>
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* and (c) 1999 Steve Ratcliffe <steve@parabola.demon.co.uk>
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* Copyright (C) 1999-2000 Takashi Iwai <tiwai@suse.de>
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*
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* Emu8000 synth plug-in routine
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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 "emu8000_local.h"
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#include <linux/init.h>
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#include <linux/module.h>
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#include <sound/initval.h>
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MODULE_AUTHOR("Takashi Iwai, Steve Ratcliffe");
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MODULE_DESCRIPTION("Emu8000 synth plug-in routine");
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MODULE_LICENSE("GPL");
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/*----------------------------------------------------------------*/
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/*
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* create a new hardware dependent device for Emu8000
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*/
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static int snd_emu8000_new_device(struct snd_seq_device *dev)
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{
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struct snd_emu8000 *hw;
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struct snd_emux *emu;
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hw = *(struct snd_emu8000**)SNDRV_SEQ_DEVICE_ARGPTR(dev);
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if (hw == NULL)
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return -EINVAL;
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if (hw->emu)
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return -EBUSY; /* already exists..? */
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if (snd_emux_new(&emu) < 0)
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return -ENOMEM;
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hw->emu = emu;
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snd_emu8000_ops_setup(hw);
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emu->hw = hw;
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emu->max_voices = EMU8000_DRAM_VOICES;
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emu->num_ports = hw->seq_ports;
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if (hw->memhdr) {
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snd_printk(KERN_ERR "memhdr is already initialized!?\n");
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snd_util_memhdr_free(hw->memhdr);
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}
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hw->memhdr = snd_util_memhdr_new(hw->mem_size);
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if (hw->memhdr == NULL) {
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snd_emux_free(emu);
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hw->emu = NULL;
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return -ENOMEM;
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}
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emu->memhdr = hw->memhdr;
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emu->midi_ports = hw->seq_ports < 2 ? hw->seq_ports : 2; /* number of virmidi ports */
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emu->midi_devidx = 1;
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emu->linear_panning = 1;
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emu->hwdep_idx = 2; /* FIXED */
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if (snd_emux_register(emu, dev->card, hw->index, "Emu8000") < 0) {
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snd_emux_free(emu);
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snd_util_memhdr_free(hw->memhdr);
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hw->emu = NULL;
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hw->memhdr = NULL;
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return -ENOMEM;
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}
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if (hw->mem_size > 0)
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snd_emu8000_pcm_new(dev->card, hw, 1);
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dev->driver_data = hw;
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return 0;
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}
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/*
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* free all resources
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*/
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static int snd_emu8000_delete_device(struct snd_seq_device *dev)
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{
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struct snd_emu8000 *hw;
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if (dev->driver_data == NULL)
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return 0; /* no synth was allocated actually */
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hw = dev->driver_data;
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if (hw->pcm)
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snd_device_free(dev->card, hw->pcm);
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snd_emux_free(hw->emu);
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snd_util_memhdr_free(hw->memhdr);
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hw->emu = NULL;
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hw->memhdr = NULL;
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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_emu8000_init(void)
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{
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static struct snd_seq_dev_ops ops = {
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snd_emu8000_new_device,
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snd_emu8000_delete_device,
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};
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return snd_seq_device_register_driver(SNDRV_SEQ_DEV_ID_EMU8000, &ops,
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sizeof(struct snd_emu8000*));
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}
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static void __exit alsa_emu8000_exit(void)
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{
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snd_seq_device_unregister_driver(SNDRV_SEQ_DEV_ID_EMU8000);
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}
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module_init(alsa_emu8000_init)
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module_exit(alsa_emu8000_exit)
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