diff mbox series

[v4,23/28] mfd: core: Ensure disabled devices are skiped without aborting

Message ID 528425d6472176bb1d02d79596b51f8c28a551cc.1692376361.git.christophe.leroy@csgroup.eu
State New
Headers show
Series Add support for QMC HDLC, framer infrastruture and PEF2256 framer (v4) | expand

Commit Message

Christophe Leroy Aug. 18, 2023, 4:39 p.m. UTC
From: Herve Codina <herve.codina@bootlin.com>

The loop searching for a matching device based on its compatible
string is aborted when a matching disabled device is found.
This abort prevents to add devices as soon as one disabled device
is found.

Continue searching for an other device instead of aborting on the
first disabled one fixes the issue.

Fixes: 22380b65dc70 ("mfd: mfd-core: Ensure disabled devices are ignored without error")
Signed-off-by: Herve Codina <herve.codina@bootlin.com>
Reviewed-by: Christophe Leroy <christophe.leroy@csgroup.eu>
Signed-off-by: Christophe Leroy <christophe.leroy@csgroup.eu>
---
 drivers/mfd/mfd-core.c | 17 ++++++++++++-----
 1 file changed, 12 insertions(+), 5 deletions(-)

Comments

Lee Jones Aug. 21, 2023, 12:17 p.m. UTC | #1
On Fri, 18 Aug 2023, Christophe Leroy wrote:

> From: Herve Codina <herve.codina@bootlin.com>
> 
> The loop searching for a matching device based on its compatible
> string is aborted when a matching disabled device is found.
> This abort prevents to add devices as soon as one disabled device
> is found.
> 
> Continue searching for an other device instead of aborting on the
> first disabled one fixes the issue.
> 
> Fixes: 22380b65dc70 ("mfd: mfd-core: Ensure disabled devices are ignored without error")
> Signed-off-by: Herve Codina <herve.codina@bootlin.com>
> Reviewed-by: Christophe Leroy <christophe.leroy@csgroup.eu>
> Signed-off-by: Christophe Leroy <christophe.leroy@csgroup.eu>
> ---
>  drivers/mfd/mfd-core.c | 17 ++++++++++++-----
>  1 file changed, 12 insertions(+), 5 deletions(-)

This is too big of a change to be added this late in the cycle.

Pushing review until after v6.5 is out.
diff mbox series

Patch

diff --git a/drivers/mfd/mfd-core.c b/drivers/mfd/mfd-core.c
index 0ed7c0d7784e..2b85509a90fc 100644
--- a/drivers/mfd/mfd-core.c
+++ b/drivers/mfd/mfd-core.c
@@ -146,6 +146,7 @@  static int mfd_add_device(struct device *parent, int id,
 	struct platform_device *pdev;
 	struct device_node *np = NULL;
 	struct mfd_of_node_entry *of_entry, *tmp;
+	bool disabled = false;
 	int ret = -ENOMEM;
 	int platform_id;
 	int r;
@@ -183,11 +184,10 @@  static int mfd_add_device(struct device *parent, int id,
 	if (IS_ENABLED(CONFIG_OF) && parent->of_node && cell->of_compatible) {
 		for_each_child_of_node(parent->of_node, np) {
 			if (of_device_is_compatible(np, cell->of_compatible)) {
-				/* Ignore 'disabled' devices error free */
+				/* Skip 'disabled' devices */
 				if (!of_device_is_available(np)) {
-					of_node_put(np);
-					ret = 0;
-					goto fail_alias;
+					disabled = true;
+					continue;
 				}
 
 				ret = mfd_match_of_node_to_dev(pdev, np, cell);
@@ -197,10 +197,17 @@  static int mfd_add_device(struct device *parent, int id,
 				if (ret)
 					goto fail_alias;
 
-				break;
+				goto match;
 			}
 		}
 
+		if (disabled) {
+			/* Ignore 'disabled' devices error free */
+			ret = 0;
+			goto fail_alias;
+		}
+
+match:
 		if (!pdev->dev.of_node)
 			pr_warn("%s: Failed to locate of_node [id: %d]\n",
 				cell->name, platform_id);