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Subject[PATCH] 5/10 sound/oss/wf_midi.c
From
--- vanilla-2.5.33/sound/oss/wf_midi.c	Sat Apr 20 18:25:22 2002
+++ linux-2.5-cli-oss/sound/oss/wf_midi.c Fri Aug 16 12:43:47 2002
@@ -50,6 +50,7 @@
*/

#include <linux/init.h>
+#include <linux/spinlock.h>
#include "sound_config.h"

#include <linux/wavefront.h>
@@ -79,6 +80,7 @@
static struct wf_mpu_config *virt_dev = &devs[1];

static void start_uart_mode (void);
+static spinlock_t lock=SPIN_LOCK_UNLOCKED;

#define OUTPUT_READY 0x40
#define INPUT_AVAIL 0x80
@@ -365,8 +367,8 @@
}

if (mi->m_busy) return;
+ spin_lock(&lock);
mi->m_busy = 1;
- sti ();

if (!input_dev) {
input_dev = physical_dev;
@@ -406,6 +408,7 @@
} while (input_avail() && n-- > 0);

mi->m_busy = 0;
+ spin_unlock(&lock);
}

static int
@@ -486,18 +489,17 @@
for (timeout = 30000; timeout > 0 && !output_ready ();
timeout--);

- save_flags (flags);
- cli ();
+ spin_lock_irqsave(&lock, flags);

if (!output_ready ()) {
printk (KERN_WARNING "WF-MPU: Send switch "
"byte timeout\n");
- restore_flags (flags);
+ spin_unlock_irqrestore(&lock, flags);
return 0;
}

write_data (switchch);
- restore_flags (flags);
+ spin_unlock_irqrestore(&lock, flags);
}

lastoutdev = dev;
@@ -511,16 +513,15 @@

for (timeout = 30000; timeout > 0 && !output_ready (); timeout--);

- save_flags (flags);
- cli ();
+ spin_lock_irqsave(&lock, flags);
if (!output_ready ()) {
+ spin_unlock_irqrestore(&lock, flags);
printk (KERN_WARNING "WF-MPU: Send data timeout\n");
- restore_flags (flags);
return 0;
}

write_data (midi_byte);
- restore_flags (flags);
+ spin_unlock_irqrestore(&lock, flags);

return 1;
}
@@ -768,14 +769,13 @@
{
unsigned long flags;

- save_flags (flags);
- cli();
+ spin_lock_irqsave(&lock, flags);

wf_mpu_close (virt_dev->devno);
/* no synth on virt_dev, so no need to call wf_mpu_synth_close() */
phys_dev->isvirtual = 0;

- restore_flags (flags);
+ spin_unlock_irqrestore(&lock, flags);

return 0;
}
@@ -858,8 +858,7 @@
int ok, i;
unsigned long flags;

- save_flags (flags);
- cli ();
+ spin_lock_irqsave(&lock, flags);

/* XXX fix me */

@@ -875,6 +874,6 @@
}
}

- restore_flags (flags);
+ spin_unlock_irqrestore(&lock, flags);
}
#endif
-
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