Recent commit f06bedfa62d5 ("pNFS/flexfiles: don't attempt pnfs on fatal DS
errors") has changed the error return type of ff_layout_choose_ds_for_read() from
NULL to an error pointer. However, not all code paths have been updated
to match the change. Thus, some non-NULL checks will accept error pointers
as a valid return value.
Reported-by: Dan Carpenter <dan.carpenter@xxxxxxxxxx>
Fixes: f06bedfa62d5 ("pNFS/flexfiles: don't attempt pnfs on fatal DS errors")
Signed-off-by: Tigran Mkrtchyan <tigran.mkrtchyan@xxxxxxx>
---
fs/nfs/flexfilelayout/flexfilelayout.c | 6 +++---
1 file changed, 3 insertions(+), 3 deletions(-)
diff --git a/fs/nfs/flexfilelayout/flexfilelayout.c b/fs/nfs/flexfilelayout/flexfilelayout.c
index 8dc921d83538..258158dfd557 100644
--- a/fs/nfs/flexfilelayout/flexfilelayout.c
+++ b/fs/nfs/flexfilelayout/flexfilelayout.c
@@ -804,7 +804,7 @@ ff_layout_choose_best_ds_for_read(struct pnfs_layout_segment *lseg,
struct nfs4_pnfs_ds *ds;
ds = ff_layout_choose_valid_ds_for_read(lseg, start_idx, best_idx);
- if (ds)
+ if (!IS_ERR(ds))
return ds;
return ff_layout_choose_any_ds_for_read(lseg, start_idx, best_idx);
}
@@ -818,7 +818,7 @@ ff_layout_get_ds_for_read(struct nfs_pageio_descriptor *pgio,
ds = ff_layout_choose_best_ds_for_read(lseg, pgio->pg_mirror_idx,
best_idx);
- if (ds || !pgio->pg_mirror_idx)
+ if (!IS_ERR(ds) || !pgio->pg_mirror_idx)
return ds;
return ff_layout_choose_best_ds_for_read(lseg, 0, best_idx);
}
@@ -868,7 +868,7 @@ ff_layout_pg_init_read(struct nfs_pageio_descriptor *pgio,
req->wb_nio = 0;
ds = ff_layout_get_ds_for_read(pgio, &ds_idx);
- if (!ds) {
+ if (IS_ERR(ds)) {
if (!ff_layout_no_fallback_to_mds(pgio->pg_lseg))
goto out_mds;
pnfs_generic_pg_cleanup(pgio);
--
2.51.0
