linux-kernel - Applied "spi: stm32-qspi: properly manage probe errors" to the spi tree

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Date:   Tue, 11 Feb 2020 15:51:46 +0000
From:   Mark Brown <broonie@...nel.org>
To:     Lionel Debieve <lionel.debieve@...com>
Cc:     Alexandre Torgue <alexandre.torgue@...com>,
        christophe.kerello@...com,
        Etienne Carriere <etienne.carriere@...com>,
        linux-arm-kernel@...ts.infradead.org, linux-kernel@...r.kernel.org,
        linux-spi@...r.kernel.org,
        linux-stm32@...md-mailman.stormreply.com,
        Mark Brown <broonie@...nel.org>,
        Maxime Coquelin <mcoquelin.stm32@...il.com>,
        Patrice Chotard <patrice.chotard@...com>,
        patrice.chotard@...com
Subject: Applied "spi: stm32-qspi: properly manage probe errors" to the spi tree

The patch

   spi: stm32-qspi: properly manage probe errors

has been applied to the spi tree at

   https://git.kernel.org/pub/scm/linux/kernel/git/broonie/spi.git for-5.7

All being well this means that it will be integrated into the linux-next
tree (usually sometime in the next 24 hours) and sent to Linus during
the next merge window (or sooner if it is a bug fix), however if
problems are discovered then the patch may be dropped or reverted.  

You may get further e-mails resulting from automated or manual testing
and review of the tree, please engage with people reporting problems and
send followup patches addressing any issues that are reported if needed.

If any updates are required or you are submitting further changes they
should be sent as incremental updates against current git, existing
patches will not be replaced.

Please add any relevant lists and maintainers to the CCs when replying
to this mail.

Thanks,
Mark

>From 4a08d6c8662472121b0ddc29180ab3c94c34f586 Mon Sep 17 00:00:00 2001
From: Lionel Debieve <lionel.debieve@...com>
Date: Mon, 3 Feb 2020 14:50:48 +0100
Subject: [PATCH] spi: stm32-qspi: properly manage probe errors

Fix resource release issues when driver probe operation fails.

Signed-off-by: Lionel Debieve <lionel.debieve@...com>
Signed-off-by: Etienne Carriere <etienne.carriere@...com>
Signed-off-by: Patrice Chotard <patrice.chotard@...com>
Link: https://lore.kernel.org/r/20200203135048.1299-3-patrice.chotard@st.com
Signed-off-by: Mark Brown <broonie@...nel.org>
---
 drivers/spi/spi-stm32-qspi.c | 27 +++++++++++++++------------
 1 file changed, 15 insertions(+), 12 deletions(-)

diff --git a/drivers/spi/spi-stm32-qspi.c b/drivers/spi/spi-stm32-qspi.c
index 13bb64bf4c8f..d066f5144c3e 100644
--- a/drivers/spi/spi-stm32-qspi.c
+++ b/drivers/spi/spi-stm32-qspi.c
@@ -565,7 +565,7 @@ static int stm32_qspi_probe(struct platform_device *pdev)
 	qspi->io_base = devm_ioremap_resource(dev, res);
 	if (IS_ERR(qspi->io_base)) {
 		ret = PTR_ERR(qspi->io_base);
-		goto err;
+		goto err_master_put;
 	}
 
 	qspi->phys_base = res->start;
@@ -574,24 +574,26 @@ static int stm32_qspi_probe(struct platform_device *pdev)
 	qspi->mm_base = devm_ioremap_resource(dev, res);
 	if (IS_ERR(qspi->mm_base)) {
 		ret = PTR_ERR(qspi->mm_base);
-		goto err;
+		goto err_master_put;
 	}
 
 	qspi->mm_size = resource_size(res);
 	if (qspi->mm_size > STM32_QSPI_MAX_MMAP_SZ) {
 		ret = -EINVAL;
-		goto err;
+		goto err_master_put;
 	}
 
 	irq = platform_get_irq(pdev, 0);
-	if (irq < 0)
-		return irq;
+	if (irq < 0) {
+		ret = irq;
+		goto err_master_put;
+	}
 
 	ret = devm_request_irq(dev, irq, stm32_qspi_irq, 0,
 			       dev_name(dev), qspi);
 	if (ret) {
 		dev_err(dev, "failed to request irq\n");
-		goto err;
+		goto err_master_put;
 	}
 
 	init_completion(&qspi->data_completion);
@@ -599,26 +601,26 @@ static int stm32_qspi_probe(struct platform_device *pdev)
 	qspi->clk = devm_clk_get(dev, NULL);
 	if (IS_ERR(qspi->clk)) {
 		ret = PTR_ERR(qspi->clk);
-		goto err;
+		goto err_master_put;
 	}
 
 	qspi->clk_rate = clk_get_rate(qspi->clk);
 	if (!qspi->clk_rate) {
 		ret = -EINVAL;
-		goto err;
+		goto err_master_put;
 	}
 
 	ret = clk_prepare_enable(qspi->clk);
 	if (ret) {
 		dev_err(dev, "can not enable the clock\n");
-		goto err;
+		goto err_master_put;
 	}
 
 	rstc = devm_reset_control_get_exclusive(dev, NULL);
 	if (IS_ERR(rstc)) {
 		ret = PTR_ERR(rstc);
 		if (ret == -EPROBE_DEFER)
-			goto err;
+			goto err_qspi_release;
 	} else {
 		reset_control_assert(rstc);
 		udelay(2);
@@ -629,7 +631,7 @@ static int stm32_qspi_probe(struct platform_device *pdev)
 	platform_set_drvdata(pdev, qspi);
 	ret = stm32_qspi_dma_setup(qspi);
 	if (ret)
-		goto err;
+		goto err_qspi_release;
 
 	mutex_init(&qspi->lock);
 
@@ -645,8 +647,9 @@ static int stm32_qspi_probe(struct platform_device *pdev)
 	if (!ret)
 		return 0;
 
-err:
+err_qspi_release:
 	stm32_qspi_release(qspi);
+err_master_put:
 	spi_master_put(qspi->ctrl);
 
 	return ret;
-- 
2.20.1