1 files changed, 29 insertions, 2 deletions

diff --git a/sound/sh/aica.c b/sound/sh/aica.c
index 131ec481228..88dc840152c 100644
--- a/sound/sh/aica.c
+++ b/sound/sh/aica.c
@@ -106,11 +106,14 @@ static void spu_write_wait(void)
 static void spu_memset(u32 toi, u32 what, int length)
 {
         int i;
+        unsigned long flags;
         snd_assert(length % 4 == 0, return);
         for (i = 0; i < length; i++) {
                 if (!(i % 8))
                         spu_write_wait();
+                local_irq_save(flags);
                 writel(what, toi + SPU_MEMORY_BASE);
+                local_irq_restore(flags);
                 toi++;
         }
 }
@@ -118,6 +121,7 @@ static void spu_memset(u32 toi, u32 what, int length)
 /* spu_memload - write to SPU address space */
 static void spu_memload(u32 toi, void *from, int length)
 {
+        unsigned long flags;
         u32 *froml = from;
         u32 __iomem *to = (u32 __iomem *) (SPU_MEMORY_BASE + toi);
         int i;
@@ -128,7 +132,9 @@ static void spu_memload(u32 toi, void *from, int length)
                 if (!(i % 8))
                         spu_write_wait();
                 val = *froml;
+                local_irq_save(flags);
                 writel(val, to);
+                local_irq_restore(flags);
                 froml++;
                 to++;
         }
@@ -138,28 +144,36 @@ static void spu_memload(u32 toi, void *from, int length)
 static void spu_disable(void)
 {
         int i;
+        unsigned long flags;
         u32 regval;
         spu_write_wait();
         regval = readl(ARM_RESET_REGISTER);
         regval |= 1;
         spu_write_wait();
+        local_irq_save(flags);
         writel(regval, ARM_RESET_REGISTER);
+        local_irq_restore(flags);
         for (i = 0; i < 64; i++) {
                 spu_write_wait();
                 regval = readl(SPU_REGISTER_BASE + (i * 0x80));
                 regval = (regval & ~0x4000) | 0x8000;
                 spu_write_wait();
+                local_irq_save(flags);
                 writel(regval, SPU_REGISTER_BASE + (i * 0x80));
+                local_irq_restore(flags);
         }
 }
 
 /* spu_enable - set spu registers to enable sound output */
 static void spu_enable(void)
 {
+        unsigned long flags;
         u32 regval = readl(ARM_RESET_REGISTER);
         regval &= ~1;
         spu_write_wait();
+        local_irq_save(flags);
         writel(regval, ARM_RESET_REGISTER);
+        local_irq_restore(flags);
 }
 
 /* 
@@ -168,25 +182,34 @@ static void spu_enable(void)
 */
 static void spu_reset(void)
 {
+        unsigned long flags;
         spu_disable();
         spu_memset(0, 0, 0x200000 / 4);
         /* Put ARM7 in endless loop */
+        local_irq_save(flags);
         ctrl_outl(0xea000002, SPU_MEMORY_BASE);
+        local_irq_restore(flags);
         spu_enable();
 }
 
 /* aica_chn_start - write to spu to start playback */
 static void aica_chn_start(void)
 {
+        unsigned long flags;
         spu_write_wait();
+        local_irq_save(flags);
         writel(AICA_CMD_KICK | AICA_CMD_START, (u32 *) AICA_CONTROL_POINT);
+        local_irq_restore(flags);
 }
 
 /* aica_chn_halt - write to spu to halt playback */
 static void aica_chn_halt(void)
 {
+        unsigned long flags;
         spu_write_wait();
+        local_irq_save(flags);
         writel(AICA_CMD_KICK | AICA_CMD_STOP, (u32 *) AICA_CONTROL_POINT);
+        local_irq_restore(flags);
 }
 
 /* ALSA code below */
@@ -213,12 +236,13 @@ static int aica_dma_transfer(int channels, int buffer_size,
         int q, err, period_offset;
         struct snd_card_aica *dreamcastcard;
         struct snd_pcm_runtime *runtime;
-        err = 0;
+        unsigned long flags;
         dreamcastcard = substream->pcm->private_data;
         period_offset = dreamcastcard->clicks;
         period_offset %= (AICA_PERIOD_NUMBER / channels);
         runtime = substream->runtime;
         for (q = 0; q < channels; q++) {
+                local_irq_save(flags);
                 err = dma_xfer(AICA_DMA_CHANNEL,
                                (unsigned long) (runtime->dma_area +
                                                 (AICA_BUFFER_SIZE * q) /
@@ -228,9 +252,12 @@ static int aica_dma_transfer(int channels, int buffer_size,
                                AICA_CHANNEL0_OFFSET + q * CHANNEL_OFFSET +
                                AICA_PERIOD_SIZE * period_offset,
                                buffer_size / channels, AICA_DMA_MODE);
-                if (unlikely(err < 0))
+                if (unlikely(err < 0)) {
+                        local_irq_restore(flags);
                         break;
+                }
                 dma_wait_for_completion(AICA_DMA_CHANNEL);
+                local_irq_restore(flags);
         }
         return err;
 }