From: pavankumaryalagada@gmail.com
To: johan@kernel.org, gregkh@linuxfoundation.org
Cc: vireshk@kernel.org, elder@kernel.org,
greybus-dev@lists.linaro.org, linux-staging@lists.linux.dev,
linux-kernel@vger.kernel.org, outreachy@lists.linux.dev,
Yalagada Pavan Kumar <pavankumaryalagada@gmail.com>
Subject: [PATCH v4] staging: greybus: replace PTR_ERR() with %pe in error messages
Date: Thu, 15 Oct 2026 13:52:38 +0530 [thread overview]
Message-ID: <20261015082238.65187-1-pavankumaryalagada@gmail.com> (raw)
From: Yalagada Pavan Kumar <pavankumaryalagada@gmail.com>
Use %pe to print error pointers directly and display their
error names.
Keep PTR_ERR() calls when the numeric error value is needed
for returning the error code.
Signed-off-by: Yalagada Pavan Kumar <pavankumaryalagada@gmail.com>
---
v4:
- Return error codes directly instead of storing them in ret,
as suggested by Julia Lawall.
- Remove the unused ret variable.
v3:
- Extend the %pe conversion throughout Greybus, as suggested by Alex Elder.
v2:
- Use %pe in the firmware management case, as suggested by Jeremy Clifton,
to match the other cases.
v1: https://lore.kernel.org/outreachy/as0nhVbagZa8Birm@user/T/#t
---
drivers/staging/greybus/arche-apb-ctrl.c | 37 ++++++++++--------------
drivers/staging/greybus/arche-platform.c | 26 +++++++----------
drivers/staging/greybus/fw-core.c | 16 +++++-----
drivers/staging/greybus/uart.c | 2 +-
4 files changed, 35 insertions(+), 46 deletions(-)
diff --git a/drivers/staging/greybus/arche-apb-ctrl.c b/drivers/staging/greybus/arche-apb-ctrl.c
index 4302c2226126..d30174310828 100644
--- a/drivers/staging/greybus/arche-apb-ctrl.c
+++ b/drivers/staging/greybus/arche-apb-ctrl.c
@@ -144,10 +144,9 @@ static int fw_flashing_seq(struct platform_device *pdev)
apb->spi_en = devm_gpiod_get(dev, "spi-en", flags);
if (IS_ERR(apb->spi_en)) {
- ret = PTR_ERR(apb->spi_en);
- dev_err(dev, "Failed requesting SPI bus en GPIO: %d\n",
- ret);
- return ret;
+ dev_err(dev, "Failed requesting SPI bus en GPIO: %pe\n",
+ apb->spi_en);
+ return PTR_ERR(apb->spi_en);
}
}
@@ -318,43 +317,37 @@ static int apb_ctrl_get_fw_data(struct platform_device *pdev,
struct arche_apb_ctrl_drvdata *apb)
{
struct device *dev = &pdev->dev;
- int ret;
apb->resetn = devm_gpiod_get(dev, "reset", GPIOD_OUT_LOW);
if (IS_ERR(apb->resetn)) {
- ret = PTR_ERR(apb->resetn);
- dev_err(dev, "Failed requesting reset GPIO: %d\n", ret);
- return ret;
+ dev_err(dev, "Failed requesting reset GPIO: %pe\n", apb->resetn);
+ return PTR_ERR(apb->resetn);
}
apb->boot_ret = devm_gpiod_get(dev, "boot-ret", GPIOD_OUT_LOW);
if (IS_ERR(apb->boot_ret)) {
- ret = PTR_ERR(apb->boot_ret);
- dev_err(dev, "Failed requesting bootret GPIO: %d\n", ret);
- return ret;
+ dev_err(dev, "Failed requesting bootret GPIO: %pe\n", apb->boot_ret);
+ return PTR_ERR(apb->boot_ret);
}
/* It's not mandatory to support power management interface */
apb->pwroff = devm_gpiod_get_optional(dev, "pwr-off", GPIOD_IN);
if (IS_ERR(apb->pwroff)) {
- ret = PTR_ERR(apb->pwroff);
- dev_err(dev, "Failed requesting pwroff_n GPIO: %d\n", ret);
- return ret;
+ dev_err(dev, "Failed requesting pwroff_n GPIO: %pe\n", apb->pwroff);
+ return PTR_ERR(apb->pwroff);
}
/* Do not make clock mandatory as of now (for DB3) */
apb->clk_en = devm_gpiod_get_optional(dev, "clock-en", GPIOD_OUT_LOW);
if (IS_ERR(apb->clk_en)) {
- ret = PTR_ERR(apb->clk_en);
- dev_err(dev, "Failed requesting APB clock en GPIO: %d\n", ret);
- return ret;
+ dev_err(dev, "Failed requesting APB clock en GPIO: %pe\n", apb->clk_en);
+ return PTR_ERR(apb->clk_en);
}
apb->pwrdn = devm_gpiod_get(dev, "pwr-down", GPIOD_OUT_LOW);
if (IS_ERR(apb->pwrdn)) {
- ret = PTR_ERR(apb->pwrdn);
- dev_warn(dev, "Failed requesting power down GPIO: %d\n", ret);
- return ret;
+ dev_warn(dev, "Failed requesting power down GPIO: %pe\n", apb->pwrdn);
+ return PTR_ERR(apb->pwrdn);
}
/* Regulators are optional, as we may have fixed supply coming in */
@@ -368,12 +361,12 @@ static int apb_ctrl_get_fw_data(struct platform_device *pdev,
apb->pinctrl = devm_pinctrl_get(&pdev->dev);
if (IS_ERR(apb->pinctrl)) {
- dev_err(&pdev->dev, "could not get pinctrl handle\n");
+ dev_err(&pdev->dev, "could not get pinctrl handle: %pe\n", apb->pinctrl);
return PTR_ERR(apb->pinctrl);
}
apb->pin_default = pinctrl_lookup_state(apb->pinctrl, "default");
if (IS_ERR(apb->pin_default)) {
- dev_err(&pdev->dev, "could not get default pin state\n");
+ dev_err(&pdev->dev, "could not get default pin state: %pe\n", apb->pin_default);
return PTR_ERR(apb->pin_default);
}
diff --git a/drivers/staging/greybus/arche-platform.c b/drivers/staging/greybus/arche-platform.c
index de5de59ea8ab..8e75accc34b6 100644
--- a/drivers/staging/greybus/arche-platform.c
+++ b/drivers/staging/greybus/arche-platform.c
@@ -444,35 +444,32 @@ static int arche_platform_probe(struct platform_device *pdev)
arche_pdata->svc_reset = devm_gpiod_get(dev, "svc,reset", flags);
if (IS_ERR(arche_pdata->svc_reset)) {
- ret = PTR_ERR(arche_pdata->svc_reset);
- dev_err(dev, "failed to request svc-reset GPIO: %d\n", ret);
- return ret;
+ dev_err(dev, "failed to request svc-reset GPIO: %pe\n", arche_pdata->svc_reset);
+ return PTR_ERR(arche_pdata->svc_reset);
}
arche_platform_set_state(arche_pdata, ARCHE_PLATFORM_STATE_OFF);
arche_pdata->svc_sysboot = devm_gpiod_get(dev, "svc,sysboot",
GPIOD_OUT_LOW);
if (IS_ERR(arche_pdata->svc_sysboot)) {
- ret = PTR_ERR(arche_pdata->svc_sysboot);
- dev_err(dev, "failed to request sysboot0 GPIO: %d\n", ret);
- return ret;
+ dev_err(dev, "failed to request sysboot0 GPIO: %pe\n", arche_pdata->svc_sysboot);
+ return PTR_ERR(arche_pdata->svc_sysboot);
}
/* setup the clock request gpio first */
arche_pdata->svc_refclk_req = devm_gpiod_get(dev, "svc,refclk-req",
GPIOD_IN);
if (IS_ERR(arche_pdata->svc_refclk_req)) {
- ret = PTR_ERR(arche_pdata->svc_refclk_req);
- dev_err(dev, "failed to request svc-clk-req GPIO: %d\n", ret);
- return ret;
+ dev_err(dev, "failed to request svc-clk-req GPIO: %pe\n",
+ arche_pdata->svc_refclk_req);
+ return PTR_ERR(arche_pdata->svc_refclk_req);
}
/* setup refclk2 to follow the pin */
arche_pdata->svc_ref_clk = devm_clk_get(dev, "svc_ref_clk");
if (IS_ERR(arche_pdata->svc_ref_clk)) {
- ret = PTR_ERR(arche_pdata->svc_ref_clk);
- dev_err(dev, "failed to get svc_ref_clk: %d\n", ret);
- return ret;
+ dev_err(dev, "failed to get svc_ref_clk: %pe\n", arche_pdata->svc_ref_clk);
+ return PTR_ERR(arche_pdata->svc_ref_clk);
}
platform_set_drvdata(pdev, arche_pdata);
@@ -483,9 +480,8 @@ static int arche_platform_probe(struct platform_device *pdev)
arche_pdata->wake_detect = devm_gpiod_get(dev, "svc,wake-detect",
GPIOD_IN);
if (IS_ERR(arche_pdata->wake_detect)) {
- ret = PTR_ERR(arche_pdata->wake_detect);
- dev_err(dev, "Failed requesting wake_detect GPIO: %d\n", ret);
- return ret;
+ dev_err(dev, "Failed requesting wake_detect GPIO: %pe\n", arche_pdata->wake_detect);
+ return PTR_ERR(arche_pdata->wake_detect);
}
arche_platform_set_wake_detect_state(arche_pdata, WD_STATE_IDLE);
diff --git a/drivers/staging/greybus/fw-core.c b/drivers/staging/greybus/fw-core.c
index 2016a74f137f..78321be80013 100644
--- a/drivers/staging/greybus/fw-core.c
+++ b/drivers/staging/greybus/fw-core.c
@@ -93,8 +93,8 @@ static int gb_fw_core_probe(struct gb_bundle *bundle,
if (IS_ERR(connection)) {
ret = PTR_ERR(connection);
dev_err(&bundle->dev,
- "failed to create management connection (%d)\n",
- ret);
+ "failed to create management connection (%pe)\n",
+ connection);
goto err_destroy_connections;
}
@@ -112,8 +112,8 @@ static int gb_fw_core_probe(struct gb_bundle *bundle,
connection = gb_connection_create(bundle, cport_id,
gb_fw_download_request_handler);
if (IS_ERR(connection)) {
- dev_err(&bundle->dev, "failed to create download connection (%ld)\n",
- PTR_ERR(connection));
+ dev_err(&bundle->dev, "failed to create download connection (%pe)\n",
+ connection);
} else {
fw_core->download_connection = connection;
}
@@ -131,8 +131,8 @@ static int gb_fw_core_probe(struct gb_bundle *bundle,
connection = gb_connection_create(bundle, cport_id,
NULL);
if (IS_ERR(connection)) {
- dev_err(&bundle->dev, "failed to create SPI connection (%ld)\n",
- PTR_ERR(connection));
+ dev_err(&bundle->dev, "failed to create SPI connection (%pe)\n",
+ connection);
} else {
fw_core->spi_connection = connection;
}
@@ -149,8 +149,8 @@ static int gb_fw_core_probe(struct gb_bundle *bundle,
connection = gb_connection_create(bundle, cport_id,
NULL);
if (IS_ERR(connection)) {
- dev_err(&bundle->dev, "failed to create Authentication connection (%ld)\n",
- PTR_ERR(connection));
+ dev_err(&bundle->dev, "failed to create Authentication connection (%pe)\n",
+ connection);
} else {
fw_core->cap_connection = connection;
}
diff --git a/drivers/staging/greybus/uart.c b/drivers/staging/greybus/uart.c
index 172cf900eaf0..59a112cf47a0 100644
--- a/drivers/staging/greybus/uart.c
+++ b/drivers/staging/greybus/uart.c
@@ -951,7 +951,7 @@ static int gb_tty_init(void)
TTY_DRIVER_DYNAMIC_DEV |
TTY_DRIVER_RESET_SAVED_TERMIOS);
if (IS_ERR(gb_tty_driver)) {
- pr_err("Can not allocate tty driver\n");
+ pr_err("Can not allocate tty driver: %pe\n", gb_tty_driver);
retval = PTR_ERR(gb_tty_driver);
goto fail_unregister_dev;
}
--
2.43.0
next reply other threads:[~2026-10-15 8:22 UTC|newest]
Thread overview: 7+ messages / expand[flat|nested] mbox.gz Atom feed top
2026-10-15 8:22 pavankumaryalagada [this message]
2026-10-15 12:13 ` Alex Elder
2026-10-15 18:10 ` Julia Lawall
2026-10-15 19:57 ` Dan Carpenter
2026-10-17 11:20 ` Greg KH
2026-10-17 13:45 ` Yalagada Pavan Kumar
2026-10-18 6:33 ` Greg KH
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