spin lock should be released while returning from function
Signed-off-by: Saurabh Sengar <[email protected]>
---
drivers/dma/mic_x100_dma.c | 17 +++++++++++------
1 file changed, 11 insertions(+), 6 deletions(-)
diff --git a/drivers/dma/mic_x100_dma.c b/drivers/dma/mic_x100_dma.c
index 068e920..7f6d477 100644
--- a/drivers/dma/mic_x100_dma.c
+++ b/drivers/dma/mic_x100_dma.c
@@ -317,17 +317,21 @@ mic_dma_prep_memcpy_lock(struct dma_chan *ch, dma_addr_t
dma_dest,
struct mic_dma_chan *mic_ch = to_mic_dma_chan(ch);
struct device *dev = mic_dma_ch_to_device(mic_ch);
int result;
+ struct dma_async_tx_descriptor *tx = NULL;
if (!len && !flags)
- return NULL;
+ return tx;
spin_lock(&mic_ch->prep_lock);
result = mic_dma_do_dma(mic_ch, flags, dma_src, dma_dest, len);
if (result >= 0)
- return allocate_tx(mic_ch);
- dev_err(dev, "Error enqueueing dma, error=%d\n", result);
+ tx = allocate_tx(mic_ch);
+
+ if(!tx)
+ dev_err(dev, "Error enqueueing dma, error=%d\n", result);
+
spin_unlock(&mic_ch->prep_lock);
- return NULL;
+ return tx;
}
static struct dma_async_tx_descriptor *
@@ -335,13 +339,14 @@ mic_dma_prep_interrupt_lock(struct dma_chan *ch, unsigned
long flags)
{
struct mic_dma_chan *mic_ch = to_mic_dma_chan(ch);
int ret;
+ struct dma_async_tx_descriptor *tx = NULL;
spin_lock(&mic_ch->prep_lock);
ret = mic_dma_do_dma(mic_ch, flags, 0, 0, 0);
if (!ret)
- return allocate_tx(mic_ch);
+ tx = allocate_tx(mic_ch);
spin_unlock(&mic_ch->prep_lock);
- return NULL;
+ return tx;
}
/* Return the status of the transaction */
--
1.9.1
--
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