diff options
| author | Ian Abbott <abbotti@mev.co.uk> | 2017-11-15 23:33:12 +0100 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2017-11-28 16:31:27 +0100 |
| commit | 0f5eb1545907edeea7672a9c1652c4231150ff22 (patch) | |
| tree | 4a362b398d175919a4ffb256e3622cc793a91c77 /drivers/fpga | |
| parent | fpga: fpga-bridge: remove unnecessary null check in of_fpga_bridge_get (diff) | |
| download | linux-0f5eb1545907edeea7672a9c1652c4231150ff22.tar.xz linux-0f5eb1545907edeea7672a9c1652c4231150ff22.zip | |
fpga: region: release of_parse_phandle nodes after use
Both fpga_region_get_manager() and fpga_region_get_bridges() call
of_parse_phandle(), but nothing calls of_node_put() on the returned
struct device_node pointers. Make sure to do that to stop their
reference counters getting out of whack.
Fixes: 0fa20cdfcc1f ("fpga: fpga-region: device tree control for FPGA")
Cc: <stable@vger.kernel.org> # 4.10+
Signed-off-by: Ian Abbott <abbotti@mev.co.uk>
Signed-off-by: Alan Tull <atull@kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'drivers/fpga')
| -rw-r--r-- | drivers/fpga/of-fpga-region.c | 13 |
1 files changed, 10 insertions, 3 deletions
diff --git a/drivers/fpga/of-fpga-region.c b/drivers/fpga/of-fpga-region.c index c6b21194dcbc..119ff75522f1 100644 --- a/drivers/fpga/of-fpga-region.c +++ b/drivers/fpga/of-fpga-region.c @@ -73,6 +73,7 @@ static struct fpga_manager *of_fpga_region_get_mgr(struct device_node *np) mgr_node = of_parse_phandle(np, "fpga-mgr", 0); if (mgr_node) { mgr = of_fpga_mgr_get(mgr_node); + of_node_put(mgr_node); of_node_put(np); return mgr; } @@ -120,10 +121,13 @@ static int of_fpga_region_get_bridges(struct fpga_region *region) parent_br = region_np->parent; /* If overlay has a list of bridges, use it. */ - if (of_parse_phandle(info->overlay, "fpga-bridges", 0)) + br = of_parse_phandle(info->overlay, "fpga-bridges", 0); + if (br) { + of_node_put(br); np = info->overlay; - else + } else { np = region_np; + } for (i = 0; ; i++) { br = of_parse_phandle(np, "fpga-bridges", i); @@ -131,12 +135,15 @@ static int of_fpga_region_get_bridges(struct fpga_region *region) break; /* If parent bridge is in list, skip it. */ - if (br == parent_br) + if (br == parent_br) { + of_node_put(br); continue; + } /* If node is a bridge, get it and add to list */ ret = of_fpga_bridge_get_to_list(br, info, ®ion->bridge_list); + of_node_put(br); /* If any of the bridges are in use, give up */ if (ret == -EBUSY) { |