| 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: <20240929184930.73049-3-marex@denx.de>
Date: Sun, 29 Sep 2024 20:49:18 +0200
From: Marek Vasut <marex@...x.de>
To: linux-arm-kernel@...ts.infradead.org
Cc: kernel@...electronics.com,
Marek Vasut <marex@...x.de>,
AngeloGioacchino Del Regno <angelogioacchino.delregno@...labora.com>,
Arnd Bergmann <arnd@...db.de>,
Fabio Estevam <festevam@...il.com>,
Jeff Johnson <quic_jjohnson@...cinc.com>,
Neil Armstrong <neil.armstrong@...aro.org>,
Pengutronix Kernel Team <kernel@...gutronix.de>,
Saravana Kannan <saravanak@...gle.com>,
Sascha Hauer <s.hauer@...gutronix.de>,
Shawn Guo <shawnguo@...nel.org>,
imx@...ts.linux.dev,
linux-kernel@...r.kernel.org
Subject: [PATCH v4 3/3] soc: imx8m: Use devm_* to simplify probe failure handling
Use device managed functions to simplify handling of failures during
probe. Remove fail paths which are no longer necessary.
Signed-off-by: Marek Vasut <marex@...x.de>
---
Cc: AngeloGioacchino Del Regno <angelogioacchino.delregno@...labora.com>
Cc: Arnd Bergmann <arnd@...db.de>
Cc: Fabio Estevam <festevam@...il.com>
Cc: Jeff Johnson <quic_jjohnson@...cinc.com>
Cc: Neil Armstrong <neil.armstrong@...aro.org>
Cc: Pengutronix Kernel Team <kernel@...gutronix.de>
Cc: Saravana Kannan <saravanak@...gle.com>
Cc: Sascha Hauer <s.hauer@...gutronix.de>
Cc: Shawn Guo <shawnguo@...nel.org>
Cc: imx@...ts.linux.dev
Cc: linux-arm-kernel@...ts.infradead.org
Cc: linux-kernel@...r.kernel.org
---
V4: New patch
---
drivers/soc/imx/soc-imx8m.c | 92 ++++++++++++-------------------------
1 file changed, 29 insertions(+), 63 deletions(-)
diff --git a/drivers/soc/imx/soc-imx8m.c b/drivers/soc/imx/soc-imx8m.c
index 966593320e28d..8ac7658e3d525 100644
--- a/drivers/soc/imx/soc-imx8m.c
+++ b/drivers/soc/imx/soc-imx8m.c
@@ -51,22 +51,20 @@ static inline u32 imx8mq_soc_revision_from_atf(void) { return 0; };
static int imx8mq_soc_revision(u32 *socrev, u64 *socuid)
{
- struct device_node *np;
+ struct device_node *np __free(device_node) =
+ of_find_compatible_node(NULL, NULL, "fsl,imx8mq-ocotp");
void __iomem *ocotp_base;
u32 magic;
u32 rev;
struct clk *clk;
int ret;
- np = of_find_compatible_node(NULL, NULL, "fsl,imx8mq-ocotp");
if (!np)
return -EINVAL;
ocotp_base = of_iomap(np, 0);
- if (!ocotp_base) {
- ret = -EINVAL;
- goto err_iomap;
- }
+ if (!ocotp_base)
+ return -EINVAL;
clk = of_clk_get_by_name(np, NULL);
if (IS_ERR(clk)) {
@@ -96,35 +94,30 @@ static int imx8mq_soc_revision(u32 *socrev, u64 *socuid)
clk_disable_unprepare(clk);
clk_put(clk);
iounmap(ocotp_base);
- of_node_put(np);
return 0;
err_clk:
iounmap(ocotp_base);
-err_iomap:
- of_node_put(np);
return ret;
}
static int imx8mm_soc_uid(u64 *socuid)
{
+ struct device_node *np __free(device_node) =
+ of_find_compatible_node(NULL, NULL, "fsl,imx8mm-ocotp");
void __iomem *ocotp_base;
- struct device_node *np;
struct clk *clk;
int ret = 0;
u32 offset = of_machine_is_compatible("fsl,imx8mp") ?
IMX8MP_OCOTP_UID_OFFSET : 0;
- np = of_find_compatible_node(NULL, NULL, "fsl,imx8mm-ocotp");
if (!np)
return -EINVAL;
ocotp_base = of_iomap(np, 0);
- if (!ocotp_base) {
- ret = -EINVAL;
- goto err_iomap;
- }
+ if (!ocotp_base)
+ return -EINVAL;
clk = of_clk_get_by_name(np, NULL);
if (IS_ERR(clk)) {
@@ -143,38 +136,27 @@ static int imx8mm_soc_uid(u64 *socuid)
err_clk:
iounmap(ocotp_base);
-err_iomap:
- of_node_put(np);
-
return ret;
}
static int imx8mm_soc_revision(u32 *socrev, u64 *socuid)
{
- struct device_node *np;
+ struct device_node *np __free(device_node) =
+ of_find_compatible_node(NULL, NULL, "fsl,imx8mm-anatop");
void __iomem *anatop_base;
- int ret;
- np = of_find_compatible_node(NULL, NULL, "fsl,imx8mm-anatop");
if (!np)
return -EINVAL;
anatop_base = of_iomap(np, 0);
- if (!anatop_base) {
- ret = -EINVAL;
- goto err_iomap;
- }
+ if (!anatop_base)
+ return -EINVAL;
*socrev = readl_relaxed(anatop_base + ANADIG_DIGPROG_IMX8MM);
iounmap(anatop_base);
- of_node_put(np);
return imx8mm_soc_uid(socuid);
-
-err_iomap:
- of_node_put(np);
- return ret;
}
static const struct imx8_soc_data imx8mq_soc_data = {
@@ -205,22 +187,23 @@ static __maybe_unused const struct of_device_id imx8_soc_match[] = {
{ }
};
-#define imx8_revision(soc_rev) \
- soc_rev ? \
- kasprintf(GFP_KERNEL, "%d.%d", (soc_rev >> 4) & 0xf, soc_rev & 0xf) : \
+#define imx8_revision(dev, soc_rev) \
+ (soc_rev) ? \
+ devm_kasprintf((dev), GFP_KERNEL, "%d.%d", ((soc_rev) >> 4) & 0xf, (soc_rev) & 0xf) : \
"unknown"
static int imx8m_soc_probe(struct platform_device *pdev)
{
struct soc_device_attribute *soc_dev_attr;
const struct imx8_soc_data *data;
+ struct device *dev = &pdev->dev;
const struct of_device_id *id;
struct soc_device *soc_dev;
u32 soc_rev = 0;
u64 soc_uid = 0;
int ret;
- soc_dev_attr = kzalloc(sizeof(*soc_dev_attr), GFP_KERNEL);
+ soc_dev_attr = devm_kzalloc(dev, sizeof(*soc_dev_attr), GFP_KERNEL);
if (!soc_dev_attr)
return -ENOMEM;
@@ -228,13 +211,11 @@ static int imx8m_soc_probe(struct platform_device *pdev)
ret = of_property_read_string(of_root, "model", &soc_dev_attr->machine);
if (ret)
- goto free_soc;
+ return ret;
id = of_match_node(imx8_soc_match, of_root);
- if (!id) {
- ret = -ENODEV;
- goto free_soc;
- }
+ if (!id)
+ return -ENODEV;
data = id->data;
if (data) {
@@ -242,27 +223,21 @@ static int imx8m_soc_probe(struct platform_device *pdev)
if (data->soc_revision) {
ret = data->soc_revision(&soc_rev, &soc_uid);
if (ret)
- goto free_soc;
+ return ret;
}
}
- soc_dev_attr->revision = imx8_revision(soc_rev);
- if (!soc_dev_attr->revision) {
- ret = -ENOMEM;
- goto free_soc;
- }
+ soc_dev_attr->revision = imx8_revision(dev, soc_rev);
+ if (!soc_dev_attr->revision)
+ return -ENOMEM;
- soc_dev_attr->serial_number = kasprintf(GFP_KERNEL, "%016llX", soc_uid);
- if (!soc_dev_attr->serial_number) {
- ret = -ENOMEM;
- goto free_rev;
- }
+ soc_dev_attr->serial_number = devm_kasprintf(dev, GFP_KERNEL, "%016llX", soc_uid);
+ if (!soc_dev_attr->serial_number)
+ return -ENOMEM;
soc_dev = soc_device_register(soc_dev_attr);
- if (IS_ERR(soc_dev)) {
- ret = PTR_ERR(soc_dev);
- goto free_serial_number;
- }
+ if (IS_ERR(soc_dev))
+ return PTR_ERR(soc_dev);
pr_info("SoC: %s revision %s\n", soc_dev_attr->soc_id,
soc_dev_attr->revision);
@@ -271,15 +246,6 @@ static int imx8m_soc_probe(struct platform_device *pdev)
platform_device_register_simple("imx-cpufreq-dt", -1, NULL, 0);
return 0;
-
-free_serial_number:
- kfree(soc_dev_attr->serial_number);
-free_rev:
- if (strcmp(soc_dev_attr->revision, "unknown"))
- kfree(soc_dev_attr->revision);
-free_soc:
- kfree(soc_dev_attr);
- return ret;
}
static struct platform_driver imx8m_soc_driver = {
--
2.45.2
Powered by blists - more mailing lists