dma/shdma: move dereference below the NULL check

"param" can be NULL here, so only dereference it after the check.

Signed-off-by: Dan Carpenter <error27@gmail.com>
Signed-off-by: Dan Williams <dan.j.williams@intel.com>

diff --git a/drivers/dma/shdma.c b/drivers/dma/shdma.c
index fb64cf36ba61d0e786ecfeb802f43909ade4f2f2..eb6b54dbb8064a9a5d2e71eb3261132195ff6f8d 100644 (file)
--- a/drivers/dma/shdma.c
+++ b/drivers/dma/shdma.c
@@ -580,7 +580,6 @@ static struct dma_async_tx_descriptor *sh_dmae_prep_slave_sg(
 
        sh_chan = to_sh_chan(chan);
        param = chan->private;
-       slave_addr = param->config->addr;
 
        /* Someone calling slave DMA on a public channel? */
        if (!param || !sg_len) {
@@ -589,6 +588,8 @@ static struct dma_async_tx_descriptor *sh_dmae_prep_slave_sg(
                return NULL;
        }
 
+       slave_addr = param->config->addr;
+
        /*
         * if (param != NULL), this is a successfully requested slave channel,
         * therefore param->config != NULL too.