| lists.openwall.net | lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC | |
|
Open Source and information security mailing list archives
| ||
|
Message-Id: <20260115-schneider-6-19-rc1-qspi-v2-7-7e6a06e1e17b@bootlin.com>
Date: Thu, 15 Jan 2026 10:24:58 +0100
From: "Miquel Raynal (Schneider Electric)" <miquel.raynal@...tlin.com>
To: Mark Brown <broonie@...nel.org>, Rob Herring <robh@...nel.org>,
Krzysztof Kozlowski <krzk+dt@...nel.org>,
Conor Dooley <conor+dt@...nel.org>,
Geert Uytterhoeven <geert+renesas@...der.be>,
Magnus Damm <magnus.damm@...il.com>, Vaishnav Achath <vaishnav.a@...com>
Cc: Thomas Petazzoni <thomas.petazzoni@...tlin.com>,
Hervé Codina <herve.codina@...tlin.com>,
Wolfram Sang <wsa+renesas@...g-engineering.com>,
Vignesh Raghavendra <vigneshr@...com>, Santhosh Kumar K <s-k6@...com>,
Pratyush Yadav <pratyush@...nel.org>,
Pascal Eberhard <pascal.eberhard@...com>, linux-spi@...r.kernel.org,
devicetree@...r.kernel.org, linux-kernel@...r.kernel.org,
linux-renesas-soc@...r.kernel.org,
"Miquel Raynal (Schneider Electric)" <miquel.raynal@...tlin.com>
Subject: [PATCH v2 07/13] spi: cadence-qspi: Fix probe error path and
remove
The probe has been modified by many different users, it is hard to track
history, but for sure its current state is partially broken. One easy
rule to follow is to drop/free/release the resources in the opposite
order they have been queried.
Fix the labels, the order for freeing the resources, and add the
missing DMA channel step. Replicate these changes in the remove path as
well.
Signed-off-by: Miquel Raynal (Schneider Electric) <miquel.raynal@...tlin.com>
---
drivers/spi/spi-cadence-quadspi.c | 44 ++++++++++++++++++++++-----------------
1 file changed, 25 insertions(+), 19 deletions(-)
diff --git a/drivers/spi/spi-cadence-quadspi.c b/drivers/spi/spi-cadence-quadspi.c
index fc9f6e8dd549..4bfe65af458e 100644
--- a/drivers/spi/spi-cadence-quadspi.c
+++ b/drivers/spi/spi-cadence-quadspi.c
@@ -1890,7 +1890,7 @@ static int cqspi_probe(struct platform_device *pdev)
ret = clk_prepare_enable(cqspi->clk);
if (ret) {
dev_err(dev, "Cannot enable QSPI clock.\n");
- goto probe_clk_failed;
+ goto disable_rpm;
}
/* Obtain QSPI reset control */
@@ -1898,14 +1898,14 @@ static int cqspi_probe(struct platform_device *pdev)
if (IS_ERR(rstc)) {
ret = PTR_ERR(rstc);
dev_err(dev, "Cannot get QSPI reset.\n");
- goto probe_reset_failed;
+ goto disable_clk;
}
rstc_ocp = devm_reset_control_get_optional_exclusive(dev, "qspi-ocp");
if (IS_ERR(rstc_ocp)) {
ret = PTR_ERR(rstc_ocp);
dev_err(dev, "Cannot get QSPI OCP reset.\n");
- goto probe_reset_failed;
+ goto disable_clk;
}
if (of_device_is_compatible(pdev->dev.of_node, "starfive,jh7110-qspi")) {
@@ -1913,7 +1913,7 @@ static int cqspi_probe(struct platform_device *pdev)
if (IS_ERR(rstc_ref)) {
ret = PTR_ERR(rstc_ref);
dev_err(dev, "Cannot get QSPI REF reset.\n");
- goto probe_reset_failed;
+ goto disable_clk;
}
reset_control_assert(rstc_ref);
reset_control_deassert(rstc_ref);
@@ -1955,7 +1955,7 @@ static int cqspi_probe(struct platform_device *pdev)
if (ddata->jh7110_clk_init) {
ret = cqspi_jh7110_clk_init(pdev, cqspi);
if (ret)
- goto probe_reset_failed;
+ goto disable_clk;
}
if (ddata->quirks & CQSPI_DISABLE_STIG_MODE)
cqspi->disable_stig_mode = true;
@@ -1963,7 +1963,7 @@ static int cqspi_probe(struct platform_device *pdev)
if (ddata->quirks & CQSPI_DMA_SET_MASK) {
ret = dma_set_mask(&pdev->dev, DMA_BIT_MASK(64));
if (ret)
- goto probe_reset_failed;
+ goto disable_clks;
}
}
@@ -1974,7 +1974,7 @@ static int cqspi_probe(struct platform_device *pdev)
pdev->name, cqspi);
if (ret) {
dev_err(dev, "Cannot request IRQ.\n");
- goto probe_reset_failed;
+ goto disable_clks;
}
cqspi_wait_idle(cqspi);
@@ -2001,31 +2001,36 @@ static int cqspi_probe(struct platform_device *pdev)
ret = cqspi_request_mmap_dma(cqspi);
if (ret == -EPROBE_DEFER) {
dev_err_probe(&pdev->dev, ret, "Failed to request mmap DMA\n");
- goto probe_setup_failed;
+ goto disable_controller;
}
}
ret = spi_register_controller(host);
if (ret) {
dev_err(&pdev->dev, "failed to register SPI ctlr %d\n", ret);
- goto probe_setup_failed;
+ goto release_dma_chan;
}
if (!(ddata && (ddata->quirks & CQSPI_DISABLE_RUNTIME_PM)))
pm_runtime_put_autosuspend(dev);
return 0;
-probe_setup_failed:
- if (!(ddata && (ddata->quirks & CQSPI_DISABLE_RUNTIME_PM)))
- pm_runtime_disable(dev);
+
+release_dma_chan:
+ if (cqspi->rx_chan)
+ dma_release_channel(cqspi->rx_chan);
+disable_controller:
cqspi_controller_enable(cqspi, 0);
-probe_reset_failed:
+disable_clks:
if (cqspi->is_jh7110)
cqspi_jh7110_disable_clk(pdev, cqspi);
-
+disable_clk:
if (pm_runtime_get_sync(&pdev->dev) >= 0)
clk_disable_unprepare(cqspi->clk);
-probe_clk_failed:
+disable_rpm:
+ if (!(ddata && (ddata->quirks & CQSPI_DISABLE_RUNTIME_PM)))
+ pm_runtime_disable(dev);
+
return ret;
}
@@ -2043,18 +2048,19 @@ static void cqspi_remove(struct platform_device *pdev)
cqspi_wait_idle(cqspi);
spi_unregister_controller(cqspi->host);
- cqspi_controller_enable(cqspi, 0);
if (cqspi->rx_chan)
dma_release_channel(cqspi->rx_chan);
- if (!(ddata && (ddata->quirks & CQSPI_DISABLE_RUNTIME_PM)))
- if (pm_runtime_get_sync(&pdev->dev) >= 0)
- clk_disable(cqspi->clk);
+ cqspi_controller_enable(cqspi, 0);
if (cqspi->is_jh7110)
cqspi_jh7110_disable_clk(pdev, cqspi);
+ if (!(ddata && (ddata->quirks & CQSPI_DISABLE_RUNTIME_PM)))
+ if (pm_runtime_get_sync(&pdev->dev) >= 0)
+ clk_disable(cqspi->clk);
+
if (!(ddata && (ddata->quirks & CQSPI_DISABLE_RUNTIME_PM))) {
pm_runtime_put_sync(&pdev->dev);
pm_runtime_disable(&pdev->dev);
--
2.51.1
Powered by blists - more mailing lists