dmaengine: Revert "dmaengine: mic_x100: add missing spin_unlock"

This reverts commit e958e079e254 ("dmaengine: mic_x100: add missing
spin_unlock").

The above patch is incorrect. There is nothing wrong with the original
code. The spin_lock is acquired in the "prep" functions and released
in "submit".

Signed-off-by: Ashutosh Dixit <ashutosh.dixit@intel.com>
Signed-off-by: Vinod Koul <vinod.koul@intel.com>

diff --git a/drivers/dma/mic_x100_dma.c b/drivers/dma/mic_x100_dma.c
index cddfa8dbf4bdfb421508e8d10e74faa8a165c4f0..068e920ecb68d5ec681a1ca8a84642796a39a704 100644 (file)
--- a/drivers/dma/mic_x100_dma.c
+++ b/drivers/dma/mic_x100_dma.c
@@ -317,7 +317,6 @@ 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;
@@ -325,13 +324,10 @@ mic_dma_prep_memcpy_lock(struct dma_chan *ch, dma_addr_t dma_dest,
        spin_lock(&mic_ch->prep_lock);
        result = mic_dma_do_dma(mic_ch, flags, dma_src, dma_dest, len);
        if (result >= 0)
-               tx = allocate_tx(mic_ch);
-
-       if (!tx)
-               dev_err(dev, "Error enqueueing dma, error=%d\n", result);
-
+               return allocate_tx(mic_ch);
+       dev_err(dev, "Error enqueueing dma, error=%d\n", result);
        spin_unlock(&mic_ch->prep_lock);
-       return tx;
+       return NULL;
 }
 
 static struct dma_async_tx_descriptor *
@@ -339,14 +335,13 @@ 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)
-               tx = allocate_tx(mic_ch);
+               return allocate_tx(mic_ch);
        spin_unlock(&mic_ch->prep_lock);
-       return tx;
+       return NULL;
 }
 
 /* Return the status of the transaction */