lightnvm: set default lun range when no luns are specified

The create target ioctl takes a lun begin and lun end parameter, which
defines the range of luns to initialize a target with. If the user does
not set the parameters, it default to only using lun 0. Instead,
defaults to use all luns in the OCSSD, as it is the usual behaviour
users want.

Signed-off-by: Matias Bjørling <matias@cnexlabs.com>
Signed-off-by: Jens Axboe <axboe@fb.com>

diff --git a/drivers/lightnvm/core.c b/drivers/lightnvm/core.c
index 6ce76c0a75e12f379cb6bb00f86985060991a86f..5262ba66a7a74c94d91d2c5815eb5bf19f2c62a2 100644 (file)
--- a/drivers/lightnvm/core.c
+++ b/drivers/lightnvm/core.c
@@ -1102,6 +1102,11 @@ static int __nvm_configure_create(struct nvm_ioctl_create *create)
        }
        s = &create->conf.s;
 
+       if (s->lun_begin == -1 && s->lun_end == -1) {
+               s->lun_begin = 0;
+               s->lun_end = dev->geo.nr_luns - 1;
+       }
+
        if (s->lun_begin > s->lun_end || s->lun_end >= dev->geo.nr_luns) {
                pr_err("nvm: lun out of bound (%u:%u > %u)\n",
                        s->lun_begin, s->lun_end, dev->geo.nr_luns - 1);