netdev - [PATCH net-next 2/2] net: stmmac: dwmac-anarion: Always return struct anarion_gmac * from anarion_config

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Message-Id: <20230406-dwmac-anarion-sparse-v1-2-b0c866c8be9d@kernel.org>
Date:   Thu, 06 Apr 2023 19:30:10 +0200
From:   Simon Horman <horms@...nel.org>
To:     Jakub Kicinski <kuba@...nel.org>,
        "David S. Miller" <davem@...emloft.net>,
        Eric Dumazet <edumazet@...gle.com>,
        Paolo Abeni <pabeni@...hat.com>
Cc:     Giuseppe Cavallaro <peppe.cavallaro@...com>,
        Alexandre Torgue <alexandre.torgue@...s.st.com>,
        Jose Abreu <joabreu@...opsys.com>,
        Maxime Coquelin <mcoquelin.stm32@...il.com>,
        netdev@...r.kernel.org, linux-stm32@...md-mailman.stormreply.com,
        linux-arm-kernel@...ts.infradead.org
Subject: [PATCH net-next 2/2] net: stmmac: dwmac-anarion: Always return
 struct anarion_gmac * from anarion_config_dt()

Always return struct anarion_gmac * from anarion_config_dt().
In the case where ctl_block was an error pointer it was being
returned directly. Which sparse flags as follows:

 .../dwmac-anarion.c:73:24: warning: incorrect type in return expression (different address spaces)
 .../dwmac-anarion.c:73:24:    expected struct anarion_gmac *
 .../dwmac-anarion.c:73:24:    got void [noderef] __iomem *[assigned] ctl_block

Avoid this by converting the error pointer to an error.
And then reversing the conversion.

As a side effect, the error can be used for logging purposes,
subjectively, leading to a minor cleanup.

No functional change intended.
Compile tested only.

Signed-off-by: Simon Horman <horms@...nel.org>
---
 drivers/net/ethernet/stmicro/stmmac/dwmac-anarion.c | 6 +++---
 1 file changed, 3 insertions(+), 3 deletions(-)

diff --git a/drivers/net/ethernet/stmicro/stmmac/dwmac-anarion.c b/drivers/net/ethernet/stmicro/stmmac/dwmac-anarion.c
index 2357e77434fb..9354bf419112 100644
--- a/drivers/net/ethernet/stmicro/stmmac/dwmac-anarion.c
+++ b/drivers/net/ethernet/stmicro/stmmac/dwmac-anarion.c
@@ -68,9 +68,9 @@ static struct anarion_gmac *anarion_config_dt(struct platform_device *pdev)
 
 	ctl_block = devm_platform_ioremap_resource(pdev, 1);
 	if (IS_ERR(ctl_block)) {
-		dev_err(&pdev->dev, "Cannot get reset region (%ld)!\n",
-			PTR_ERR(ctl_block));
-		return ctl_block;
+		err = PTR_ERR(ctl_block);
+		dev_err(&pdev->dev, "Cannot get reset region (%d)!\n", err);
+		return ERR_PTR(err);
 	}
 
 	gmac = devm_kzalloc(&pdev->dev, sizeof(*gmac), GFP_KERNEL);

-- 
2.30.2