Add a call to of_node_put in the error handling code following a call to of_find_compatible_node.
The semantic match that finds this problem is as follows: (http://coccinelle.lip6.fr/) // <smpl> @r exists@ local idexpression x; expression E,E1; statement S; @@ *x = (of_find_node_by_path |of_find_node_by_name |of_find_node_by_phandle |of_get_parent |of_get_next_parent |of_get_next_child |of_find_compatible_node |of_match_node )(...); ... if (x == NULL) S <... when != x = E *if (...) { ... when != of_node_put(x) when != if (...) { ... of_node_put(x); ... } ( return <+...x...+>; | * return ...; ) } ...> of_node_put(x); // </smpl> Signed-off-by: Julia Lawall <[email protected]> --- drivers/mtd/nand/mpc5121_nfc.c | 7 +++++-- 1 file changed, 5 insertions(+), 2 deletions(-) diff --git a/drivers/mtd/nand/mpc5121_nfc.c b/drivers/mtd/nand/mpc5121_nfc.c index df0c1da..f4610bc 100644 --- a/drivers/mtd/nand/mpc5121_nfc.c +++ b/drivers/mtd/nand/mpc5121_nfc.c @@ -568,6 +568,7 @@ static int mpc5121_nfc_read_hw_config(struct mtd_info *mtd) uint rcw_width; uint rcwh; uint romloc, ps; + int ret = 0; rmnode = of_find_compatible_node(NULL, NULL, "fsl,mpc5121-reset"); if (!rmnode) { @@ -579,7 +580,8 @@ static int mpc5121_nfc_read_hw_config(struct mtd_info *mtd) rm = of_iomap(rmnode, 0); if (!rm) { dev_err(prv->dev, "Error mapping reset module node!\n"); - return -EBUSY; + ret = -EBUSY; + goto out; } rcwh = in_be32(&rm->rcwhr); @@ -628,8 +630,9 @@ static int mpc5121_nfc_read_hw_config(struct mtd_info *mtd) rcw_width * 8, rcw_pagesize, rcw_sparesize); iounmap(rm); +out: of_node_put(rmnode); - return 0; + return ret; } /* Free driver resources */ _______________________________________________ devicetree-discuss mailing list [email protected] https://lists.ozlabs.org/listinfo/devicetree-discuss
