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author | Borislav Petkov <petkovbb@gmail.com> | 2009-06-08 22:03:03 +0200 |
---|---|---|
committer | Bartlomiej Zolnierkiewicz <bzolnier@gmail.com> | 2009-06-08 22:03:03 +0200 |
commit | 9d01e4cd7eb4a70b04cf5a5b4f79c99e8e3e3edc (patch) | |
tree | 9de881b64afb4655c0d093db306d7ec82715dde8 | |
parent | 734affdcae20af4fec95e46a64fb29f063a15c19 (diff) | |
download | linux-9d01e4cd7eb4a70b04cf5a5b4f79c99e8e3e3edc.tar.bz2 |
ide-tape: fix proc warning
ide_tape_chrdev_get() was missing an ide_device_get() refcount increment
which lead to the following warning:
[ 278.147906] ------------[ cut here ]------------
[ 278.152685] WARNING: at fs/proc/generic.c:847 remove_proc_entry+0x199/0x1b8()
[ 278.160070] Hardware name: P4I45PE 1.00
[ 278.160076] remove_proc_entry: removing non-empty directory 'ide0/hdb', leaking at least 'name'
[ 278.160080] Modules linked in: rtc intel_agp pcspkr thermal processor thermal_sys parport_pc parport agpgart button
[ 278.160100] Pid: 2312, comm: mt Not tainted 2.6.30-rc2 #3
[ 278.160105] Call Trace:
[ 278.160117] [<c012141d>] warn_slowpath+0x71/0xa0
[ 278.160126] [<c035f219>] ? _spin_unlock_irqrestore+0x29/0x2c
[ 278.160132] [<c011c686>] ? try_to_wake_up+0x1b6/0x1c0
[ 278.160141] [<c011c69b>] ? default_wake_function+0xb/0xd
[ 278.160149] [<c0177ead>] ? pollwake+0x4a/0x55
[ 278.160156] [<c035f240>] ? _spin_unlock+0x24/0x26
[ 278.160163] [<c0165d38>] ? add_partial+0x44/0x49
[ 278.160169] [<c01669e8>] ? __slab_free+0xba/0x29c
[ 278.160177] [<c01a13d8>] ? sysfs_delete_inode+0x0/0x3c
[ 278.160184] [<c019ca92>] remove_proc_entry+0x199/0x1b8
[ 278.160191] [<c01a297e>] ? remove_dir+0x27/0x2e
[ 278.160199] [<c025f3ab>] ide_proc_unregister_device+0x40/0x4c
[ 278.160207] [<c02599cd>] drive_release_dev+0x14/0x47
[ 278.160214] [<c0250538>] device_release+0x35/0x5a
[ 278.160221] [<c01f8bed>] kobject_release+0x40/0x50
[ 278.160226] [<c01f8bad>] ? kobject_release+0x0/0x50
[ 278.160232] [<c01f96ac>] kref_put+0x3c/0x4a
[ 278.160238] [<c01f8b29>] kobject_put+0x37/0x3c
[ 278.160243] [<c025020c>] put_device+0xf/0x11
[ 278.160249] [<c025789f>] ide_device_put+0x2d/0x30
[ 278.160255] [<c02658da>] ide_tape_put+0x24/0x32
[ 278.160261] [<c0266e0c>] idetape_chrdev_release+0x17f/0x18e
[ 278.160269] [<c016c4f5>] __fput+0xca/0x175
[ 278.160275] [<c016c5b9>] fput+0x19/0x1b
[ 278.160280] [<c0169d19>] filp_close+0x51/0x5b
[ 278.160286] [<c0169d96>] sys_close+0x73/0xad
[ 278.160293] [<c0102a61>] syscall_call+0x7/0xb
[ 278.160298] ---[ end trace f16d907ea1f89336 ]---
Instead of trivially fixing it by adding the missing call,
ide_tape_chrdev_get() and ide_tape_get() were merged into one function
since both were almost identical. The only difference was that
ide_tape_chrdev_get() was accessing the ide-tape reference through the
idetape_devs[] array of minors instead of through the gendisk.
Accomodate that by adding two additional parameters to ide_tape_get() to
annotate the call site and invoke the proper behavior.
As a result, remove ide_tape_chrdev_get().
Signed-off-by: Borislav Petkov <petkovbb@gmail.com>
Signed-off-by: Bartlomiej Zolnierkiewicz <bzolnier@gmail.com>
-rw-r--r-- | drivers/ide/ide-tape.c | 35 |
1 files changed, 13 insertions, 22 deletions
diff --git a/drivers/ide/ide-tape.c b/drivers/ide/ide-tape.c index 055f52e1ea0e..51ea59e3f6ad 100644 --- a/drivers/ide/ide-tape.c +++ b/drivers/ide/ide-tape.c @@ -240,18 +240,27 @@ static struct class *idetape_sysfs_class; static void ide_tape_release(struct device *); -static struct ide_tape_obj *ide_tape_get(struct gendisk *disk) +static struct ide_tape_obj *idetape_devs[MAX_HWIFS * MAX_DRIVES]; + +static struct ide_tape_obj *ide_tape_get(struct gendisk *disk, bool cdev, + unsigned int i) { struct ide_tape_obj *tape = NULL; mutex_lock(&idetape_ref_mutex); - tape = ide_drv_g(disk, ide_tape_obj); + + if (cdev) + tape = idetape_devs[i]; + else + tape = ide_drv_g(disk, ide_tape_obj); + if (tape) { if (ide_device_get(tape->drive)) tape = NULL; else get_device(&tape->dev); } + mutex_unlock(&idetape_ref_mutex); return tape; } @@ -267,24 +276,6 @@ static void ide_tape_put(struct ide_tape_obj *tape) } /* - * The variables below are used for the character device interface. Additional - * state variables are defined in our ide_drive_t structure. - */ -static struct ide_tape_obj *idetape_devs[MAX_HWIFS * MAX_DRIVES]; - -static struct ide_tape_obj *ide_tape_chrdev_get(unsigned int i) -{ - struct ide_tape_obj *tape = NULL; - - mutex_lock(&idetape_ref_mutex); - tape = idetape_devs[i]; - if (tape) - get_device(&tape->dev); - mutex_unlock(&idetape_ref_mutex); - return tape; -} - -/* * called on each failed packet command retry to analyze the request sense. We * currently do not utilize this information. */ @@ -1495,7 +1486,7 @@ static int idetape_chrdev_open(struct inode *inode, struct file *filp) return -ENXIO; lock_kernel(); - tape = ide_tape_chrdev_get(i); + tape = ide_tape_get(NULL, true, i); if (!tape) { unlock_kernel(); return -ENXIO; @@ -1916,7 +1907,7 @@ static const struct file_operations idetape_fops = { static int idetape_open(struct block_device *bdev, fmode_t mode) { - struct ide_tape_obj *tape = ide_tape_get(bdev->bd_disk); + struct ide_tape_obj *tape = ide_tape_get(bdev->bd_disk, false, 0); if (!tape) return -ENXIO; |