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path: root/drivers/dma/ptdma/ptdma-dev.c
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Diffstat (limited to 'drivers/dma/ptdma/ptdma-dev.c')
-rw-r--r--drivers/dma/ptdma/ptdma-dev.c7
1 files changed, 4 insertions, 3 deletions
diff --git a/drivers/dma/ptdma/ptdma-dev.c b/drivers/dma/ptdma/ptdma-dev.c
index 377da23012ac..a2bf13ff18b6 100644
--- a/drivers/dma/ptdma/ptdma-dev.c
+++ b/drivers/dma/ptdma/ptdma-dev.c
@@ -71,12 +71,13 @@ static int pt_core_execute_cmd(struct ptdma_desc *desc, struct pt_cmd_queue *cmd
bool soc = FIELD_GET(DWORD0_SOC, desc->dw0);
u8 *q_desc = (u8 *)&cmd_q->qbase[cmd_q->qidx];
u32 tail;
+ unsigned long flags;
if (soc) {
desc->dw0 |= FIELD_PREP(DWORD0_IOC, desc->dw0);
desc->dw0 &= ~DWORD0_SOC;
}
- mutex_lock(&cmd_q->q_mutex);
+ spin_lock_irqsave(&cmd_q->q_lock, flags);
/* Copy 32-byte command descriptor to hw queue. */
memcpy(q_desc, desc, 32);
@@ -91,7 +92,7 @@ static int pt_core_execute_cmd(struct ptdma_desc *desc, struct pt_cmd_queue *cmd
/* Turn the queue back on using our cached control register */
pt_start_queue(cmd_q);
- mutex_unlock(&cmd_q->q_mutex);
+ spin_unlock_irqrestore(&cmd_q->q_lock, flags);
return 0;
}
@@ -199,7 +200,7 @@ int pt_core_init(struct pt_device *pt)
cmd_q->pt = pt;
cmd_q->dma_pool = dma_pool;
- mutex_init(&cmd_q->q_mutex);
+ spin_lock_init(&cmd_q->q_lock);
/* Page alignment satisfies our needs for N <= 128 */
cmd_q->qsize = Q_SIZE(Q_DESC_SIZE);