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| author | Christoph Hellwig <hch@lst.de> | 2022-07-23 08:24:29 +0200 |
|---|---|---|
| committer | Jens Axboe <axboe@kernel.dk> | 2022-08-02 17:22:46 -0600 |
| commit | 34cb92c0a5a15b04e285c690b5a7dee77ddeeaf1 (patch) | |
| tree | 6cfb8e1ed50e69186e2a36ad37486ee071222422 /drivers/md/md.c | |
| parent | a110876828f5de63be657c62a33c8f61ececfb33 (diff) | |
| download | linux-34cb92c0a5a15b04e285c690b5a7dee77ddeeaf1.tar.gz | |
md: return the allocated devices from md_alloc
Two callers of md_alloc want to use the newly allocated devices, so return it instead of letting them find it cumbersomely after the allocation. Signed-off-by: Christoph Hellwig <hch@lst.de> Reviewed-by: Hannes Reinecke <hare@suse.de> Reviewed-and-tested-by: Logan Gunthorpe <logang@deltatee.com> Signed-off-by: Song Liu <song@kernel.org> Signed-off-by: Jens Axboe <axboe@kernel.dk>
Diffstat (limited to 'drivers/md/md.c')
| -rw-r--r-- | drivers/md/md.c | 54 |
1 files changed, 22 insertions, 32 deletions
diff --git a/drivers/md/md.c b/drivers/md/md.c index 5671160ad398..6e82df21623d 100644 --- a/drivers/md/md.c +++ b/drivers/md/md.c @@ -635,7 +635,7 @@ static inline struct mddev *mddev_get(struct mddev *mddev) static void mddev_delayed_delete(struct work_struct *ws); -static void mddev_put(struct mddev *mddev) +void mddev_put(struct mddev *mddev) { if (!atomic_dec_and_lock(&mddev->active, &all_mddevs_lock)) return; @@ -714,24 +714,6 @@ static dev_t mddev_alloc_unit(void) return dev; } -#ifndef MODULE -static struct mddev *mddev_find(dev_t unit) -{ - struct mddev *mddev; - - if (MAJOR(unit) != MD_MAJOR) - unit &= ~((1 << MdpMinorShift) - 1); - - spin_lock(&all_mddevs_lock); - mddev = mddev_find_locked(unit); - if (mddev && !mddev_get(mddev)) - mddev = NULL; - spin_unlock(&all_mddevs_lock); - - return mddev; -} -#endif - static struct mddev *mddev_alloc(dev_t unit) { struct mddev *new; @@ -5614,7 +5596,7 @@ int mddev_init_writes_pending(struct mddev *mddev) } EXPORT_SYMBOL_GPL(mddev_init_writes_pending); -int md_alloc(dev_t dev, char *name) +struct mddev *md_alloc(dev_t dev, char *name) { /* * If dev is zero, name is the name of a device to allocate with @@ -5706,17 +5688,16 @@ int md_alloc(dev_t dev, char *name) * different from a normal close on last release now. */ mddev->hold_active = 0; - goto done; + mutex_unlock(&disks_mutex); + mddev_put(mddev); + return ERR_PTR(error); } kobject_uevent(&mddev->kobj, KOBJ_ADD); mddev->sysfs_state = sysfs_get_dirent_safe(mddev->kobj.sd, "array_state"); mddev->sysfs_level = sysfs_get_dirent_safe(mddev->kobj.sd, "level"); - -done: mutex_unlock(&disks_mutex); - mddev_put(mddev); - return error; + return mddev; out_put_disk: put_disk(disk); @@ -5724,7 +5705,17 @@ out_free_mddev: mddev_free(mddev); out_unlock: mutex_unlock(&disks_mutex); - return error; + return ERR_PTR(error); +} + +static int md_alloc_and_put(dev_t dev, char *name) +{ + struct mddev *mddev = md_alloc(dev, name); + + if (IS_ERR(mddev)) + return PTR_ERR(mddev); + mddev_put(mddev); + return 0; } static void md_probe(dev_t dev) @@ -5732,7 +5723,7 @@ static void md_probe(dev_t dev) if (MAJOR(dev) == MD_MAJOR && MINOR(dev) >= 512) return; if (create_on_open) - md_alloc(dev, NULL); + md_alloc_and_put(dev, NULL); } static int add_named_array(const char *val, const struct kernel_param *kp) @@ -5754,12 +5745,12 @@ static int add_named_array(const char *val, const struct kernel_param *kp) return -E2BIG; strscpy(buf, val, len+1); if (strncmp(buf, "md_", 3) == 0) - return md_alloc(0, buf); + return md_alloc_and_put(0, buf); if (strncmp(buf, "md", 2) == 0 && isdigit(buf[2]) && kstrtoul(buf+2, 10, &devnum) == 0 && devnum <= MINORMASK) - return md_alloc(MKDEV(MD_MAJOR, devnum), NULL); + return md_alloc_and_put(MKDEV(MD_MAJOR, devnum), NULL); return -EINVAL; } @@ -6500,9 +6491,8 @@ static void autorun_devices(int part) break; } - md_alloc(dev, NULL); - mddev = mddev_find(dev); - if (!mddev) + mddev = md_alloc(dev, NULL); + if (IS_ERR(mddev)) break; if (mddev_lock(mddev)) |