Re: [PATCH 3/3] remoteproc: mtk_scp: Use dev_err_probe() where possible

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Il 01/02/22 19:36, Mathieu Poirier ha scritto:
Hi Angelo,

On Mon, Jan 24, 2022 at 01:09:15PM +0100, AngeloGioacchino Del Regno wrote:
Simplify the probe function, where possible, by using dev_err_probe().
While at it, as to increase human readability, also remove some
unnecessary forced void pointer casts that were previously used in
error checking.

I am in favour of all 3 patches (please add a cover letter next time) but weary
about testing - do you have access to a Mediatek platform to try this on or
is it purely theoretical?

I would definitely feel better to see a "Tested-by" tag by someone out there
with access to the HW.

Thanks,
Mathieu


Hello Mathieu,

I have multiple MediaTek platforms and I always test on all of them before
pushing such commits upstream, so, even though this kind of patch is trivial,
this is *not* purely theoretical and I confirm that this was successfully tested.

Regards,
Angelo


Signed-off-by: AngeloGioacchino Del Regno <angelogioacchino.delregno@xxxxxxxxxxxxx>
---
  drivers/remoteproc/mtk_scp.c | 28 ++++++++++++----------------
  1 file changed, 12 insertions(+), 16 deletions(-)

diff --git a/drivers/remoteproc/mtk_scp.c b/drivers/remoteproc/mtk_scp.c
index e40706b0e015..dcddb33e9997 100644
--- a/drivers/remoteproc/mtk_scp.c
+++ b/drivers/remoteproc/mtk_scp.c
@@ -757,10 +757,8 @@ static int scp_probe(struct platform_device *pdev)
  	int ret, i;
rproc = devm_rproc_alloc(dev, np->name, &scp_ops, fw_name, sizeof(*scp));
-	if (!rproc) {
-		dev_err(dev, "unable to allocate remoteproc\n");
-		return -ENOMEM;
-	}
+	if (!rproc)
+		return dev_err_probe(dev, -ENOMEM, "unable to allocate remoteproc\n");
scp = (struct mtk_scp *)rproc->priv;
  	scp->rproc = rproc;
@@ -770,21 +768,20 @@ static int scp_probe(struct platform_device *pdev)
res = platform_get_resource_byname(pdev, IORESOURCE_MEM, "sram");
  	scp->sram_base = devm_ioremap_resource(dev, res);
-	if (IS_ERR((__force void *)scp->sram_base)) {
-		dev_err(dev, "Failed to parse and map sram memory\n");
-		return PTR_ERR((__force void *)scp->sram_base);
-	}
+	if (IS_ERR(scp->sram_base))
+		return dev_err_probe(dev, PTR_ERR(scp->sram_base),
+				     "Failed to parse and map sram memory\n");
+
  	scp->sram_size = resource_size(res);
  	scp->sram_phys = res->start;
/* l1tcm is an optional memory region */
  	res = platform_get_resource_byname(pdev, IORESOURCE_MEM, "l1tcm");
  	scp->l1tcm_base = devm_ioremap_resource(dev, res);
-	if (IS_ERR((__force void *)scp->l1tcm_base)) {
-		ret = PTR_ERR((__force void *)scp->l1tcm_base);
+	if (IS_ERR(scp->l1tcm_base)) {
+		ret = PTR_ERR(scp->l1tcm_base);
  		if (ret != -EINVAL) {
-			dev_err(dev, "Failed to map l1tcm memory\n");
-			return ret;
+			return dev_err_probe(dev, ret, "Failed to map l1tcm memory\n");
  		}
  	} else {
  		scp->l1tcm_size = resource_size(res);
@@ -792,10 +789,9 @@ static int scp_probe(struct platform_device *pdev)
  	}
scp->reg_base = devm_platform_ioremap_resource_byname(pdev, "cfg");
-	if (IS_ERR((__force void *)scp->reg_base)) {
-		dev_err(dev, "Failed to parse and map cfg memory\n");
-		return PTR_ERR((__force void *)scp->reg_base);
-	}
+	if (IS_ERR(scp->reg_base))
+		return dev_err_probe(dev, PTR_ERR(scp->reg_base),
+				     "Failed to parse and map cfg memory\n");
ret = scp->data->scp_clk_get(scp);
  	if (ret)
--
2.33.1



--
AngeloGioacchino Del Regno
Software Engineer

Collabora Ltd.
Platinum Building, St John's Innovation Park, Cambridge CB4 0DS, UK
Registered in England & Wales, no. 5513718



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