dmaengine: mcf-edma: Use struct_size()

Use struct_size() instead of hand writing it.
This is less verbose and more informative.

'mcf_chan' is now unused and can be removed. In fact, it is shadowed by
another variable in the 'for' loop below. Keep this one.

Signed-off-by: Christophe JAILLET <christophe.jaillet@wanadoo.fr>
Link: https://lore.kernel.org/r/97c2bb1c9b69d0739da3762a7752ae6582c4ad02.1683390112.git.christophe.jaillet@wanadoo.fr
Signed-off-by: Vinod Koul <vkoul@kernel.org>

diff --git a/drivers/dma/mcf-edma.c b/drivers/dma/mcf-edma.c
index ebd8733..28304dd 100644 (file)
--- a/drivers/dma/mcf-edma.c
+++ b/drivers/dma/mcf-edma.c
@@ -180,9 +180,8 @@ static int mcf_edma_probe(struct platform_device *pdev)
 {
        struct mcf_edma_platform_data *pdata;
        struct fsl_edma_engine *mcf_edma;
-       struct fsl_edma_chan *mcf_chan;
        struct edma_regs *regs;
-       int ret, i, len, chans;
+       int ret, i, chans;
 
        pdata = dev_get_platdata(&pdev->dev);
        if (!pdata) {
@@ -191,8 +190,8 @@ static int mcf_edma_probe(struct platform_device *pdev)
        }
 
        chans = pdata->dma_channels;
-       len = sizeof(*mcf_edma) + sizeof(*mcf_chan) * chans;
-       mcf_edma = devm_kzalloc(&pdev->dev, len, GFP_KERNEL);
+       mcf_edma = devm_kzalloc(&pdev->dev, struct_size(mcf_edma, chans, chans),
+                               GFP_KERNEL);
        if (!mcf_edma)
                return -ENOMEM;