linux-kernel - [PATCH v2 4/4] zorro: Drop useless (and hardly used) .driver member in struct zorro

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Message-Id: <20210730191035.1455248-5-u.kleine-koenig@pengutronix.de>
Date:   Fri, 30 Jul 2021 21:10:35 +0200
From:   Uwe Kleine-König 
        <u.kleine-koenig@...gutronix.de>
To:     Greg Kroah-Hartman <gregkh@...uxfoundation.org>
Cc:     linux-kernel@...r.kernel.org, kernel@...gutronix.de,
        Geert Uytterhoeven <geert@...ux-m68k.org>,
        linux-m68k@...ts.linux-m68k.org
Subject: [PATCH v2 4/4] zorro: Drop useless (and hardly used) .driver member in struct zorro_dev

The only actual use is to check in zorro_device_probe() that the device
isn't already bound. The driver core already ensures this however so the
check can go away which allows to drop the then assigned-only member
from struct zorro_dev.

If the value was indeed needed somewhere it can always be calculated by

	to_zorro_driver(z->dev.driver)

.

Signed-off-by: Uwe Kleine-König <u.kleine-koenig@...gutronix.de>
---
 drivers/zorro/zorro-driver.c | 7 ++-----
 include/linux/zorro.h        | 1 -
 2 files changed, 2 insertions(+), 6 deletions(-)

diff --git a/drivers/zorro/zorro-driver.c b/drivers/zorro/zorro-driver.c
index ab06c9ce2c78..96f068830549 100644
--- a/drivers/zorro/zorro-driver.c
+++ b/drivers/zorro/zorro-driver.c
@@ -47,16 +47,14 @@ static int zorro_device_probe(struct device *dev)
 	struct zorro_driver *drv = to_zorro_driver(dev->driver);
 	struct zorro_dev *z = to_zorro_dev(dev);
 
-	if (!z->driver && drv->probe) {
+	if (drv->probe) {
 		const struct zorro_device_id *id;
 
 		id = zorro_match_device(drv->id_table, z);
 		if (id)
 			error = drv->probe(z, id);
-		if (error >= 0) {
-			z->driver = drv;
+		if (error >= 0)
 			error = 0;
-		}
 	}
 	return error;
 }
@@ -69,7 +67,6 @@ static void zorro_device_remove(struct device *dev)
 
 	if (drv->remove)
 		drv->remove(z);
-	z->driver = NULL;
 }
 
 
diff --git a/include/linux/zorro.h b/include/linux/zorro.h
index e2e4de188d84..db7416ed6057 100644
--- a/include/linux/zorro.h
+++ b/include/linux/zorro.h
@@ -29,7 +29,6 @@
 struct zorro_dev {
     struct ExpansionRom rom;
     zorro_id id;
-    struct zorro_driver *driver;	/* which driver has allocated this device */
     struct device dev;			/* Generic device interface */
     u16 slotaddr;
     u16 slotsize;
-- 
2.30.2