lightnvm: handle submit_io failure

The device ->submit_io() callback might fail to submit I/O to device.
In that case, the nvm_submit_ppa function should not wait for
completion. Instead return the ->submit_io() error.

Reviewed by: Johannes Thumshirn <jthumshirn@suse.de>
Signed-off-by: Matias Bjørling <m@bjorling.me>
Signed-off-by: Jens Axboe <axboe@fb.com>

diff --git a/drivers/lightnvm/core.c b/drivers/lightnvm/core.c
index 0dc9a80..c2ef53a 100644 (file)
--- a/drivers/lightnvm/core.c
+++ b/drivers/lightnvm/core.c
@@ -351,6 +351,11 @@ int nvm_submit_ppa(struct nvm_dev *dev, struct ppa_addr *ppa, int nr_ppas,
        nvm_generic_to_addr_mode(dev, &rqd);
 
        ret = dev->ops->submit_io(dev, &rqd);
+       if (ret) {
+               nvm_free_rqd_ppalist(dev, &rqd);
+               bio_put(bio);
+               return ret;
+       }
 
        /* Prevent hang_check timer from firing at us during very long I/O */
        hang_check = sysctl_hung_task_timeout_secs;