linux-kernel - [PATCH 6/6] floppy: use disk_registered for checking if a drive is present

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Message-Id: <1344542391-16474-7-git-send-email-herton.krzesinski@canonical.com>
Date:	Thu,  9 Aug 2012 16:59:51 -0300
From:	Herton Ronaldo Krzesinski <herton.krzesinski@...onical.com>
To:	Jiri Kosina <jkosina@...e.cz>
Cc:	Andrew Morton <akpm@...ux-foundation.org>,
	Jens Axboe <axboe@...nel.dk>, Tejun Heo <tj@...nel.org>,
	linux-kernel@...r.kernel.org, Vivek Goyal <vgoyal@...hat.com>,
	Ben Hutchings <ben@...adent.org.uk>
Subject: [PATCH 6/6] floppy: use disk_registered for checking if a drive is present

Simplify/cleanup code, replacing remaining checks for drives present
using disk_registered array.

Signed-off-by: Herton Ronaldo Krzesinski <herton.krzesinski@...onical.com>
---
 drivers/block/floppy.c |   10 +++-------
 1 file changed, 3 insertions(+), 7 deletions(-)

diff --git a/drivers/block/floppy.c b/drivers/block/floppy.c
index 438ffc9..5fcc2a1 100644
--- a/drivers/block/floppy.c
+++ b/drivers/block/floppy.c
@@ -4114,9 +4114,7 @@ static struct platform_device floppy_device[N_DRIVE];
 static struct kobject *floppy_find(dev_t dev, int *part, void *data)
 {
 	int drive = (*part & 3) | ((*part & 0x80) >> 5);
-	if (drive >= N_DRIVE ||
-	    !(allowed_drive_mask & (1 << drive)) ||
-	    fdc_state[FDC(drive)].version == FDC_NONE)
+	if (drive >= N_DRIVE || !disk_registered[drive])
 		return NULL;
 	if (((*part >> 2) & 0x1f) >= ARRAY_SIZE(floppy_type))
 		return NULL;
@@ -4559,8 +4557,7 @@ static void __exit floppy_module_exit(void)
 	for (drive = 0; drive < N_DRIVE; drive++) {
 		del_timer_sync(&motor_off_timer[drive]);
 
-		if ((allowed_drive_mask & (1 << drive)) &&
-		    fdc_state[FDC(drive)].version != FDC_NONE) {
+		if (disk_registered[drive]) {
 			del_gendisk(disks[drive]);
 			device_remove_file(&floppy_device[drive].dev, &dev_attr_cmos);
 			platform_device_unregister(&floppy_device[drive]);
@@ -4571,8 +4568,7 @@ static void __exit floppy_module_exit(void)
 		 * These disks have not called add_disk().  Don't put down
 		 * queue reference in put_disk().
 		 */
-		if (!(allowed_drive_mask & (1 << drive)) ||
-		    fdc_state[FDC(drive)].version == FDC_NONE)
+		if (!disk_registered[drive])
 			disks[drive]->queue = NULL;
 
 		put_disk(disks[drive]);
-- 
1.7.9.5

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