DMAENGINE: ste_dma40: fix resource leaks in error paths.

Fix some leaks of allocated descriptors in error paths.

Acked-by: Jonas Aaberg <jonas.aberg@stericsson.com>
Signed-off-by: Rabin Vincent <rabin.vincent@stericsson.com>
Signed-off-by: Linus Walleij <linus.walleij@stericsson.com>
Signed-off-by: Dan Williams <dan.j.williams@intel.com>

1 files changed, 13 insertions, 4 deletions

diff --git a/drivers/dma/ste_dma40.c b/drivers/dma/ste_dma40.c
index 554e2942667c..c07d989f26d7 100644
--- a/drivers/dma/ste_dma40.c
+++ b/drivers/dma/ste_dma40.c
@@ -1728,6 +1728,8 @@ struct dma_async_tx_descriptor *stedma40_memcpy_sg(struct dma_chan *chan,
 
         return &d40d->txd;
 err:
+        if (d40d)
+                d40_desc_free(d40c, d40d);
         spin_unlock_irqrestore(&d40c->lock, flags);
         return NULL;
 }
@@ -1939,8 +1941,9 @@ static struct dma_async_tx_descriptor *d40_prep_memcpy(struct dma_chan *chan,
 err_fill_lli:
         dev_err(&d40c->chan.dev->device,
                 "[%s] Failed filling in PHY LLI\n", __func__);
-        d40_pool_lli_free(d40d);
 err:
+        if (d40d)
+                d40_desc_free(d40c, d40d);
         spin_unlock_irqrestore(&d40c->lock, flags);
         return NULL;
 }
@@ -2079,10 +2082,9 @@ static struct dma_async_tx_descriptor *d40_prep_slave_sg(struct dma_chan *chan,
 
         spin_lock_irqsave(&d40c->lock, flags);
         d40d = d40_desc_get(d40c);
-        spin_unlock_irqrestore(&d40c->lock, flags);
 
         if (d40d == NULL)
-                return NULL;
+                goto err;
 
         if (d40c->log_num != D40_PHY_CHAN)
                 err = d40_prep_slave_sg_log(d40d, d40c, sgl, sg_len,
@@ -2095,7 +2097,7 @@ static struct dma_async_tx_descriptor *d40_prep_slave_sg(struct dma_chan *chan,
                         "[%s] Failed to prepare %s slave sg job: %d\n",
                         __func__,
                         d40c->log_num != D40_PHY_CHAN ? "log" : "phy", err);
-                return NULL;
+                goto err;
         }
 
         d40d->txd.flags = dma_flags;
@@ -2104,7 +2106,14 @@ static struct dma_async_tx_descriptor *d40_prep_slave_sg(struct dma_chan *chan,
 
         d40d->txd.tx_submit = d40_tx_submit;
 
+        spin_unlock_irqrestore(&d40c->lock, flags);
         return &d40d->txd;
+
+err:
+        if (d40d)
+                d40_desc_free(d40c, d40d);
+        spin_unlock_irqrestore(&d40c->lock, flags);
+        return NULL;
 }
 
 static enum dma_status d40_tx_status(struct dma_chan *chan,