[PATCH 01/25] lightnvm: fix bio submission issue

From: Matias BjÃrling
Date: Tue Jan 12 2016 - 01:53:55 EST


From: Wenwei Tao <ww.tao0320@xxxxxxxxx>

Put bio when submission fails, since we get it
before submission. And return error when backend
device driver doesn't provide a submit_io method,
thus we can end IO properly.

Signed-off-by: Wenwei Tao <ww.tao0320@xxxxxxxxx>
Signed-off-by: Matias BjÃrling <m@xxxxxxxxxxx>
---
drivers/lightnvm/gennvm.c | 2 +-
drivers/lightnvm/rrpc.c | 4 +++-
2 files changed, 4 insertions(+), 2 deletions(-)

diff --git a/drivers/lightnvm/gennvm.c b/drivers/lightnvm/gennvm.c
index a54b339..62c6f4d 100644
--- a/drivers/lightnvm/gennvm.c
+++ b/drivers/lightnvm/gennvm.c
@@ -345,7 +345,7 @@ static void gennvm_generic_to_addr_mode(struct nvm_dev *dev, struct nvm_rq *rqd)
static int gennvm_submit_io(struct nvm_dev *dev, struct nvm_rq *rqd)
{
if (!dev->ops->submit_io)
- return 0;
+ return -ENODEV;

/* Convert address space */
gennvm_generic_to_addr_mode(dev, rqd);
diff --git a/drivers/lightnvm/rrpc.c b/drivers/lightnvm/rrpc.c
index 134e4fa..a1e7488 100644
--- a/drivers/lightnvm/rrpc.c
+++ b/drivers/lightnvm/rrpc.c
@@ -650,11 +650,12 @@ static int rrpc_end_io(struct nvm_rq *rqd, int error)
if (bio_data_dir(rqd->bio) == WRITE)
rrpc_end_io_write(rrpc, rrqd, laddr, npages);

+ bio_put(rqd->bio);
+
if (rrqd->flags & NVM_IOTYPE_GC)
return 0;

rrpc_unlock_rq(rrpc, rqd);
- bio_put(rqd->bio);

if (npages > 1)
nvm_dev_dma_free(rrpc->dev, rqd->ppa_list, rqd->dma_ppa_list);
@@ -841,6 +842,7 @@ static int rrpc_submit_io(struct rrpc *rrpc, struct bio *bio,
err = nvm_submit_io(rrpc->dev, rqd);
if (err) {
pr_err("rrpc: I/O submission failed: %d\n", err);
+ bio_put(bio);
return NVM_IO_ERR;
}

--
2.1.4