Linux-PHY Archive on lore.kernel.org

* [PATCH v5 08/24] scsi: ufs: mediatek: Rework init function
From: Nicolas Frattaroli @ 2026-01-08 10:49 UTC (permalink / raw)
  To: Alim Akhtar, Avri Altman, Bart Van Assche, Rob Herring,
	Krzysztof Kozlowski, Conor Dooley, Matthias Brugger,
	AngeloGioacchino Del Regno, Chunfeng Yun, Vinod Koul,
	Kishon Vijay Abraham I, Peter Wang, Stanley Jhu,
	James E.J. Bottomley, Martin K. Petersen, Philipp Zabel,
	Liam Girdwood, Mark Brown, Chaotian Jing, Neil Armstrong
  Cc: Louis-Alexis Eyraud, kernel, linux-scsi, devicetree, linux-kernel,
	linux-arm-kernel, linux-mediatek, linux-phy, Nicolas Frattaroli
In-Reply-To: <20260108-mt8196-ufs-v5-0-49215157ec41@collabora.com>

Printing an error message on ENOMEM is pointless. The print will not
work because there is no memory.

Adding an of_match_device to the init function is pointless. Why would a
different device with a different probe function ever use the same init
function? Get rid of it.

zero-initialising an error variable just so you can then goto a bare
return statement with that error variable to signal success is also
pointless, just return directly, there's no unwind being done.

Reviewed-by: Peter Wang <peter.wang@mediatek.com>
Reviewed-by: AngeloGioacchino Del Regno <angelogioacchino.delregno@collabora.com>
Signed-off-by: Nicolas Frattaroli <nicolas.frattaroli@collabora.com>
---
 drivers/ufs/host/ufs-mediatek.c | 19 ++++---------------
 1 file changed, 4 insertions(+), 15 deletions(-)

diff --git a/drivers/ufs/host/ufs-mediatek.c b/drivers/ufs/host/ufs-mediatek.c
index 7fcf4ceeb56e..4cb1a1b400ac 100644
--- a/drivers/ufs/host/ufs-mediatek.c
+++ b/drivers/ufs/host/ufs-mediatek.c
@@ -1248,29 +1248,19 @@ static int ufs_mtk_get_supplies(struct ufs_mtk_host *host)
  */
 static int ufs_mtk_init(struct ufs_hba *hba)
 {
-	const struct of_device_id *id;
 	struct device *dev = hba->dev;
 	struct ufs_mtk_host *host;
 	struct Scsi_Host *shost = hba->host;
-	int err = 0;
+	int err;
 	struct arm_smccc_res res;
 
 	host = devm_kzalloc(dev, sizeof(*host), GFP_KERNEL);
-	if (!host) {
-		err = -ENOMEM;
-		dev_info(dev, "%s: no memory for mtk ufs host\n", __func__);
-		goto out;
-	}
+	if (!host)
+		return -ENOMEM;
 
 	host->hba = hba;
 	ufshcd_set_variant(hba, host);
 
-	id = of_match_device(ufs_mtk_of_match, dev);
-	if (!id) {
-		err = -EINVAL;
-		goto out;
-	}
-
 	/* Initialize host capability */
 	ufs_mtk_init_host_caps(hba);
 
@@ -1344,11 +1334,10 @@ static int ufs_mtk_init(struct ufs_hba *hba)
 
 	ufs_mtk_get_hw_ip_version(hba);
 
-	goto out;
+	return 0;
 
 out_variant_clear:
 	ufshcd_set_variant(hba, NULL);
-out:
 	return err;
 }
 

-- 
2.52.0


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