[alsa-devel] [PATCH] sscape: remove MIDI instances counting with limit ULONG_MAX
Krzysztof Helt
krzysztof.h1 at poczta.fm
Fri Oct 2 18:41:29 CEST 2009
From: Krzysztof Helt <krzysztof.h1 at wp.pl>
There is no sense to limit open MIDI connections with limit
as high as ULONG_MAX.
Also, convert more messages to use the snd_printk.
Correct few old and misleading comments as well.
Signed-off-by: Krzysztof Helt <krzysztof.h1 at wp.pl>
---
This is the second version of this patch with improved issues pointed by Takashi.
diff --git a/sound/isa/sscape.c b/sound/isa/sscape.c
index 1ce465c..c739374 100644
--- a/sound/isa/sscape.c
+++ b/sound/isa/sscape.c
@@ -147,12 +147,6 @@ struct soundscape {
struct snd_wss *chip;
struct snd_mpu401 *mpu;
- /*
- * The MIDI device won't work until we've loaded
- * its firmware via a hardware-dependent device IOCTL
- */
- spinlock_t fwlock;
- unsigned long midi_usage;
unsigned char midi_vol;
};
@@ -164,11 +158,6 @@ static inline struct soundscape *get_card_soundscape(struct snd_card *c)
return (struct soundscape *) (c->private_data);
}
-static inline struct soundscape *get_mpu401_soundscape(struct snd_mpu401 * mpu)
-{
- return (struct soundscape *) (mpu->private_data);
-}
-
/*
* Allocates some kernel memory that we can use for DMA.
* I think this means that the memory has to map to
@@ -179,7 +168,9 @@ static struct snd_dma_buffer *get_dmabuf(struct snd_dma_buffer *buf, unsigned lo
if (buf) {
if (snd_dma_alloc_pages_fallback(SNDRV_DMA_TYPE_DEV, snd_dma_isa_data(),
size, buf) < 0) {
- snd_printk(KERN_ERR "sscape: Failed to allocate %lu bytes for DMA\n", size);
+ snd_printk(KERN_ERR "sscape: Failed to allocate "
+ "%lu bytes for DMA\n",
+ size);
return NULL;
}
}
@@ -482,7 +473,8 @@ static int upload_dma_data(struct soundscape *s,
*/
spin_unlock_irqrestore(&s->lock, flags);
- snd_printk(KERN_ERR "sscape: DMA upload has timed out\n");
+ snd_printk(KERN_ERR
+ "sscape: DMA upload has timed out\n");
ret = -EAGAIN;
goto _release_dma;
}
@@ -504,10 +496,12 @@ static int upload_dma_data(struct soundscape *s,
*/
ret = 0;
if (!obp_startup_ack(s, 5000)) {
- snd_printk(KERN_ERR "sscape: No response from on-board processor after upload\n");
+ snd_printk(KERN_ERR "sscape: No response "
+ "from on-board processor after upload\n");
ret = -EAGAIN;
} else if (!host_startup_ack(s, 5000)) {
- snd_printk(KERN_ERR "sscape: SoundScape failed to initialise\n");
+ snd_printk(KERN_ERR
+ "sscape: SoundScape failed to initialise\n");
ret = -EAGAIN;
}
@@ -536,7 +530,7 @@ static int sscape_upload_bootblock(struct snd_card *card)
ret = request_firmware(&init_fw, "scope.cod", card->dev);
if (ret < 0) {
- snd_printk(KERN_ERR "Error loading scope.cod");
+ snd_printk(KERN_ERR "sscape: Error loading scope.cod");
return ret;
}
ret = upload_dma_data(sscape, init_fw->data, init_fw->size);
@@ -554,7 +548,8 @@ static int sscape_upload_bootblock(struct snd_card *card)
data &= 0xf;
if (ret == 0 && data > 7) {
- snd_printk(KERN_ERR "timeout reading firmware version\n");
+ snd_printk(KERN_ERR
+ "sscape: timeout reading firmware version\n");
ret = -EAGAIN;
}
@@ -575,12 +570,13 @@ static int sscape_upload_microcode(struct snd_card *card, int version)
err = request_firmware(&init_fw, name, card->dev);
if (err < 0) {
- snd_printk(KERN_ERR "Error loading sndscape.co%d", version);
+ snd_printk(KERN_ERR "sscape: Error loading sndscape.co%d",
+ version);
return err;
}
err = upload_dma_data(sscape, init_fw->data, init_fw->size);
if (err == 0)
- snd_printk(KERN_INFO "MIDI firmware loaded %d KBs\n",
+ snd_printk(KERN_INFO "sscape: MIDI firmware loaded %d KBs\n",
init_fw->size >> 10);
release_firmware(init_fw);
@@ -750,7 +746,6 @@ static int __devinit detect_sscape(struct soundscape *s, long wss_io)
msleep(1);
spin_lock_irqsave(&s->lock, flags);
}
- snd_printd(KERN_INFO "init delay = %d ms\n", d);
if ((inb(wss_io) & 0x80) != 0)
goto _done;
@@ -774,7 +769,6 @@ static int __devinit detect_sscape(struct soundscape *s, long wss_io)
msleep(1);
spin_lock_irqsave(&s->lock, flags);
}
- snd_printd(KERN_INFO "init delay = %d ms\n", d);
/*
* SoundScape successfully detected!
@@ -794,38 +788,13 @@ static int __devinit detect_sscape(struct soundscape *s, long wss_io)
*/
static int mpu401_open(struct snd_mpu401 * mpu)
{
- int err;
-
if (!verify_mpu401(mpu)) {
- snd_printk(KERN_ERR "sscape: MIDI disabled, please load firmware\n");
- err = -ENODEV;
- } else {
- register struct soundscape *sscape = get_mpu401_soundscape(mpu);
- unsigned long flags;
-
- spin_lock_irqsave(&sscape->fwlock, flags);
-
- if (sscape->midi_usage == ULONG_MAX) {
- err = -EBUSY;
- } else {
- ++(sscape->midi_usage);
- err = 0;
- }
-
- spin_unlock_irqrestore(&sscape->fwlock, flags);
+ snd_printk(KERN_ERR "sscape: MIDI disabled, "
+ "please load firmware\n");
+ return -ENODEV;
}
- return err;
-}
-
-static void mpu401_close(struct snd_mpu401 * mpu)
-{
- register struct soundscape *sscape = get_mpu401_soundscape(mpu);
- unsigned long flags;
-
- spin_lock_irqsave(&sscape->fwlock, flags);
- --(sscape->midi_usage);
- spin_unlock_irqrestore(&sscape->fwlock, flags);
+ return 0;
}
/*
@@ -845,8 +814,6 @@ static int __devinit create_mpu401(struct snd_card *card, int devnum, unsigned l
struct snd_mpu401 *mpu = (struct snd_mpu401 *) rawmidi->private_data;
mpu->open_input = mpu401_open;
mpu->open_output = mpu401_open;
- mpu->close_input = mpu401_close;
- mpu->close_output = mpu401_close;
mpu->private_data = sscape;
sscape->mpu = mpu;
@@ -993,13 +960,13 @@ static int __devinit create_sscape(int dev, struct snd_card *card)
}
spin_lock_init(&sscape->lock);
- spin_lock_init(&sscape->fwlock);
sscape->io_res = io_res;
sscape->wss_res = wss_res;
sscape->io_base = port[dev];
if (!detect_sscape(sscape, wss_port[dev])) {
- printk(KERN_ERR "sscape: hardware not detected at 0x%x\n", sscape->io_base);
+ printk(KERN_ERR "sscape: hardware not detected at 0x%x\n",
+ sscape->io_base);
err = -ENODEV;
goto _release_dma;
}
@@ -1036,7 +1003,7 @@ static int __devinit create_sscape(int dev, struct snd_card *card)
mpu_irq_cfg = get_irq_config(sscape->type, mpu_irq[dev]);
if (mpu_irq_cfg == INVALID_IRQ) {
- printk(KERN_ERR "sscape: Invalid IRQ %d\n", mpu_irq[dev]);
+ snd_printk(KERN_ERR "sscape: Invalid IRQ %d\n", mpu_irq[dev]);
return -ENXIO;
}
@@ -1073,8 +1040,9 @@ static int __devinit create_sscape(int dev, struct snd_card *card)
err = create_ad1845(card, wss_port[dev], irq[dev],
dma[dev], dma2[dev]);
if (err < 0) {
- printk(KERN_ERR "sscape: No AD1845 device at 0x%lx, IRQ %d\n",
- wss_port[dev], irq[dev]);
+ snd_printk(KERN_ERR
+ "sscape: No AD1845 device at 0x%lx, IRQ %d\n",
+ wss_port[dev], irq[dev]);
goto _release_dma;
}
strcpy(card->driver, "SoundScape");
@@ -1094,7 +1062,7 @@ static int __devinit create_sscape(int dev, struct snd_card *card)
err = create_mpu401(card, MIDI_DEVNUM, port[dev],
mpu_irq[dev]);
if (err < 0) {
- printk(KERN_ERR "sscape: Failed to create "
+ snd_printk(KERN_ERR "sscape: Failed to create "
"MPU-401 device at 0x%lx\n",
port[dev]);
goto _release_dma;
@@ -1191,7 +1159,7 @@ static int __devinit snd_sscape_probe(struct device *pdev, unsigned int dev)
goto _release_card;
if ((ret = snd_card_register(card)) < 0) {
- printk(KERN_ERR "sscape: Failed to register sound card\n");
+ snd_printk(KERN_ERR "sscape: Failed to register sound card\n");
goto _release_card;
}
dev_set_drvdata(pdev, card);
@@ -1250,18 +1218,7 @@ static int __devinit sscape_pnp_detect(struct pnp_card_link *pcard,
* We have found a candidate ISA PnP card. Now we
* have to check that it has the devices that we
* expect it to have.
- *
- * We will NOT try and autoconfigure all of the resources
- * needed and then activate the card as we are assuming that
- * has already been done at boot-time using /proc/isapnp.
- * We shall simply try to give each active card the resources
- * that it wants. This is a sensible strategy for a modular
- * system where unused modules are unloaded regularly.
- *
- * This strategy is utterly useless if we compile the driver
- * into the kernel, of course.
*/
- // printk(KERN_INFO "sscape: %s\n", card->name);
/*
* Check that we still have room for another sound card ...
@@ -1272,7 +1229,7 @@ static int __devinit sscape_pnp_detect(struct pnp_card_link *pcard,
if (!pnp_is_active(dev)) {
if (pnp_activate_dev(dev) < 0) {
- printk(KERN_INFO "sscape: device is inactive\n");
+ snd_printk(KERN_INFO "sscape: device is inactive\n");
return -EBUSY;
}
}
@@ -1317,7 +1274,7 @@ static int __devinit sscape_pnp_detect(struct pnp_card_link *pcard,
goto _release_card;
if ((ret = snd_card_register(card)) < 0) {
- printk(KERN_ERR "sscape: Failed to register sound card\n");
+ snd_printk(KERN_ERR "sscape: Failed to register sound card\n");
goto _release_card;
}
--
1.6.0.3
---------------------------------------------------------------
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