linuxkpi: Define `dev_err_probe*()`

They differ from other `dev_*()` logging functions by returning the
passed error code. The error code is also used to determine if the
message should be logged in the first place and at which log level.

The DRM generic code started to use it in Linux 6.12.

Reviewed by:	bz
Sponsored by:	The FreeBSD Foundation
Differential Revision: https://reviews.freebsd.org/D56435

1 files changed, 24 insertions, 0 deletions

diff --git a/sys/compat/linuxkpi/common/include/linux/device.h b/sys/compat/linuxkpi/common/include/linux/device.h
index 030e9b127540..2913810923f1 100644
--- a/sys/compat/linuxkpi/common/include/linux/device.h
+++ b/sys/compat/linuxkpi/common/include/linux/device.h
@@ -267,6 +267,30 @@ show_class_attr_string(struct class *class,
 		dev_dbg(dev, __VA_ARGS__);	\
 } while (0)
 
+static inline int
+dev_err_probe(const struct device *dev, int err, const char *fmt, ...)
+{
+	va_list args;
+
+	va_start(args, fmt);
+
+	/*
+	 * On Linux, they look at the error code to determine if the message
+	 * should be logged (not logged if -ENOMEM) and at which log level.
+	 */
+	device_printf(dev->bsddev, fmt, args);
+
+	va_end(args);
+
+	return (err);
+}
+
+#define	dev_err_ptr_probe(dev, err, fmt, ...) \
+    ERR_PTR(dev_err_probe((dev), (err), fmt, ##__VA_ARGS__)
+
+#define	dev_err_cast_probe(dev, err, fmt, ...) \
+    ERR_PTR(dev_err_probe((dev), PTR_ERR(err), fmt, ##__VA_ARGS__)
+
 /* Public and LinuxKPI internal devres functions. */
 void *lkpi_devres_alloc(void(*release)(struct device *, void *), size_t, gfp_t);
 void lkpi_devres_add(struct device *, void *);