Boot-time assembly of arrays with md= command-line arguments breaks when
CONFIG_BLOCK_LEGACY_AUTOLOAD is unset. md_setup_drive() in md-autodetect.c
calls blkdev_get_by_dev(), assuming this implicitly creates the block
device.
Fix this by attempting to md_alloc() the array first. As in the probe path,
ignore any error as failure is caught by blkdev_get_by_dev() anyway.
Signed-off-by: Chris Webb <chris@arachsys.com>
Reviewed-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Song Liu <song@kernel.org>
Signed-off-by: Jens Axboe <axboe@kernel.dk>
pr_info("md: Loading %s: %s\n", name, args->device_names);
+ md_alloc(mdev, name);
bdev = blkdev_get_by_dev(mdev, FMODE_READ, NULL);
if (IS_ERR(bdev)) {
pr_err("md: open failed - cannot start array %s\n", name);
}
EXPORT_SYMBOL_GPL(mddev_init_writes_pending);
-static int md_alloc(dev_t dev, char *name)
+int md_alloc(dev_t dev, char *name)
{
/*
* If dev is zero, name is the name of a device to allocate with
extern int strict_strtoul_scaled(const char *cp, unsigned long *res, int scale);
extern void mddev_init(struct mddev *mddev);
+int md_alloc(dev_t dev, char *name);
extern int md_run(struct mddev *mddev);
extern int md_start(struct mddev *mddev);
extern void md_stop(struct mddev *mddev);