diff mbox series

[net,v2,4/5] ptp: vmclock: Clean up miscdev and ptp clock through devres

Message ID 20250207-vmclock-probe-v2-4-bc2fce0bdf07@linutronix.de (mailing list archive)
State Accepted
Commit 9a884c3800b207bac36e27be4ec7277c78a84568
Delegated to: Netdev Maintainers
Headers show
Series ptp: vmclock: bugfixes and cleanups for error handling | expand

Checks

Context Check Description
netdev/series_format success Posting correctly formatted
netdev/tree_selection success Clearly marked for net
netdev/ynl success Generated files up to date; no warnings/errors; no diff in generated;
netdev/fixes_present success Fixes tag present in non-next series
netdev/header_inline success No static functions without inline keyword in header files
netdev/build_32bit success Errors and warnings before: 0 this patch: 0
netdev/build_tools success No tools touched, skip
netdev/cc_maintainers success CCed 7 of 7 maintainers
netdev/build_clang success Errors and warnings before: 1 this patch: 1
netdev/verify_signedoff success Signed-off-by tag matches author and committer
netdev/deprecated_api success None detected
netdev/check_selftest success No net selftest shell script
netdev/verify_fixes success No Fixes tag
netdev/build_allmodconfig_warn success Errors and warnings before: 0 this patch: 0
netdev/checkpatch success total: 0 errors, 0 warnings, 0 checks, 44 lines checked
netdev/build_clang_rust success No Rust files in patch. Skipping build
netdev/kdoc success Errors and warnings before: 0 this patch: 0
netdev/source_inline success Was 0 now: 0
netdev/contest success net-next-2025-02-07--21-00 (tests: 890)

Commit Message

Thomas Weißschuh Feb. 7, 2025, 9:39 a.m. UTC 
Most resources owned by the vmclock device are managed through devres.
Only the miscdev and ptp clock are managed manually.
This makes the code slightly harder to understand than necessary.

Switch them over to devres and remove the now unnecessary drvdata.

Signed-off-by: Thomas Weißschuh <thomas.weissschuh@linutronix.de>
Acked-by: Richard Cochran <richardcochran@gmail.com>
Reviewed-by: David Woodhouse <dwmw@amazon.co.uk>
---
 drivers/ptp/ptp_vmclock.c | 13 ++++++-------
 1 file changed, 6 insertions(+), 7 deletions(-)
diff mbox series

Patch

diff --git a/drivers/ptp/ptp_vmclock.c b/drivers/ptp/ptp_vmclock.c
index 9b8bd626a397313433908fcc838edf8ffc3ecc98..09c023fb94b7e97137433bf18c3a065e26a36c6c 100644
--- a/drivers/ptp/ptp_vmclock.c
+++ b/drivers/ptp/ptp_vmclock.c
@@ -421,10 +421,9 @@  static const struct file_operations vmclock_miscdev_fops = {
 
 /* module operations */
 
-static void vmclock_remove(struct platform_device *pdev)
+static void vmclock_remove(void *data)
 {
-	struct device *dev = &pdev->dev;
-	struct vmclock_state *st = dev_get_drvdata(dev);
+	struct vmclock_state *st = data;
 
 	if (st->ptp_clock)
 		ptp_clock_unregister(st->ptp_clock);
@@ -525,8 +524,6 @@  static int vmclock_probe(struct platform_device *pdev)
 		goto out;
 	}
 
-	dev_set_drvdata(dev, st);
-
 	if (le32_to_cpu(st->clk->magic) != VMCLOCK_MAGIC ||
 	    le32_to_cpu(st->clk->size) > resource_size(&st->res) ||
 	    le16_to_cpu(st->clk->version) != 1) {
@@ -552,6 +549,10 @@  static int vmclock_probe(struct platform_device *pdev)
 
 	st->miscdev.minor = MISC_DYNAMIC_MINOR;
 
+	ret = devm_add_action_or_reset(&pdev->dev, vmclock_remove, st);
+	if (ret)
+		goto out;
+
 	/*
 	 * If the structure is big enough, it can be mapped to userspace.
 	 * Theoretically a guest OS even using larger pages could still
@@ -574,7 +575,6 @@  static int vmclock_probe(struct platform_device *pdev)
 		if (IS_ERR(st->ptp_clock)) {
 			ret = PTR_ERR(st->ptp_clock);
 			st->ptp_clock = NULL;
-			vmclock_remove(pdev);
 			goto out;
 		}
 	}
@@ -603,7 +603,6 @@  MODULE_DEVICE_TABLE(acpi, vmclock_acpi_ids);
 
 static struct platform_driver vmclock_platform_driver = {
 	.probe		= vmclock_probe,
-	.remove		= vmclock_remove,
 	.driver	= {
 		.name	= "vmclock",
 		.acpi_match_table = vmclock_acpi_ids,