spi: sn-f-ospi: Fix resource leak in f_ospi_probe()

In f_ospi_probe(), when num_cs validation fails, it returns without
calling spi_controller_put() on the SPI controller, which causes a
resource leak.

Use devm_spi_alloc_host() instead of spi_alloc_host() to ensure the
SPI controller is properly freed when probe fails.

Fixes: 1b74dd6 ("spi: Add Socionext F_OSPI SPI flash controller driver")
Signed-off-by: Felix Gu <ustc.gu@gmail.com>
Link: https://patch.msgid.link/20260319-sn-f-v1-1-33a6738d2da8@gmail.com
Signed-off-by: Mark Brown <broonie@kernel.org>

Author: outman119

drivers/spi/spi-sn-f-ospi.c

@@ -612,7 +612,7 @@ static int f_ospi_probe(struct platform_device *pdev)
 	u32 num_cs = OSPI_NUM_CS;
 	int ret;
 
-	ctlr = spi_alloc_host(dev, sizeof(*ospi));
+	ctlr = devm_spi_alloc_host(dev, sizeof(*ospi));
 	if (!ctlr)
 		return -ENOMEM;
 
@@ -635,16 +635,12 @@ static int f_ospi_probe(struct platform_device *pdev)
 	platform_set_drvdata(pdev, ospi);
 
 	ospi->base = devm_platform_ioremap_resource(pdev, 0);
-	if (IS_ERR(ospi->base)) {
-		ret = PTR_ERR(ospi->base);
-		goto err_put_ctlr;
-	}
+	if (IS_ERR(ospi->base))
+		return PTR_ERR(ospi->base);
 
 	ospi->clk = devm_clk_get_enabled(dev, NULL);
-	if (IS_ERR(ospi->clk)) {
-		ret = PTR_ERR(ospi->clk);
-		goto err_put_ctlr;
-	}
+	if (IS_ERR(ospi->clk))
+		return PTR_ERR(ospi->clk);
 
 	mutex_init(&ospi->mlock);
 
@@ -661,9 +657,6 @@ static int f_ospi_probe(struct platform_device *pdev)
 err_destroy_mutex:
 	mutex_destroy(&ospi->mlock);
 
-err_put_ctlr:
-	spi_controller_put(ctlr);
-
 	return ret;
 }