git: bc3e9499ca5b - stable/13 - LinuxKPI: Implement dev_driver_string()

The branch stable/13 has been updated by wulf:

URL: https://cgit.FreeBSD.org/src/commit/?id=bc3e9499ca5bcff65884c41ce73bfe67db531d8a

commit bc3e9499ca5bcff65884c41ce73bfe67db531d8a
Author:     Vladimir Kondratyev <wulf@FreeBSD.org>
AuthorDate: 2021-11-15 15:09:14 +0000
Commit:     Vladimir Kondratyev <wulf@FreeBSD.org>
CommitDate: 2022-01-22 19:34:36 +0000

    LinuxKPI: Implement dev_driver_string()
    
    Required by drm-kmod 5.7
    
    MFC after:      1 week
    Reviewed by:    bz, hselasky, manu
    Differential Revision:  https://reviews.freebsd.org/D33290
    
    (cherry picked from commit bc923d93dffc9d82a705d4e5b9960daa9acdcca6)
---
 sys/compat/linuxkpi/common/include/linux/device.h | 15 +++++++++++++++
 1 file changed, 15 insertions(+)

diff --git a/sys/compat/linuxkpi/common/include/linux/device.h b/sys/compat/linuxkpi/common/include/linux/device.h
index abafcd7ba5c4..04217fa8b35f 100644
--- a/sys/compat/linuxkpi/common/include/linux/device.h
+++ b/sys/compat/linuxkpi/common/include/linux/device.h
@@ -228,6 +228,21 @@ void lkpi_devres_release_free_list(struct device *);
 void lkpi_devres_unlink(struct device *, void *);
 void lkpi_devm_kmalloc_release(struct device *, void *);
 
+static inline const char *
+dev_driver_string(const struct device *dev)
+{
+	driver_t *drv;
+	const char *str = "";
+
+	if (dev->bsddev != NULL) {
+		drv = device_get_driver(dev->bsddev);
+		if (drv != NULL)
+			str = drv->name;
+	}
+
+	return (str);
+}
+
 static inline void *
 dev_get_drvdata(const struct device *dev)
 {