dmaengine/amba-pl08x: Check txd->llis_va before freeing dma_pool

In pl08x_free_txd(), check if pool is allocated successfully before freeing it.

Signed-off-by: Viresh Kumar <viresh.kumar@st.com>
Acked-by: Linus Walleij <linus.walleij@linaro.org>
Signed-off-by: Vinod Koul <vinod.koul@intel.com>

diff --git a/drivers/dma/amba-pl08x.c b/drivers/dma/amba-pl08x.c
index 2c390d1..b7cbd1a 100644 (file)
--- a/drivers/dma/amba-pl08x.c
+++ b/drivers/dma/amba-pl08x.c
@@ -803,7 +803,8 @@ static void pl08x_free_txd(struct pl08x_driver_data *pl08x,
        struct pl08x_sg *dsg, *_dsg;
 
        /* Free the LLI */
-       dma_pool_free(pl08x->pool, txd->llis_va, txd->llis_bus);
+       if (txd->llis_va)
+               dma_pool_free(pl08x->pool, txd->llis_va, txd->llis_bus);
 
        pl08x->pool_ctr--;