lkml.org 
[lkml]   [2015]   [Nov]   [16]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
/
From
Subject[PATCH 0/7] add missing of_node_put
Date
The various for_each device_node iterators performs an of_node_get on each
iteration, so a break out of the loop requires an of_node_put.

The complete semantic patch that finds this problem is
(http://coccinelle.lip6.fr):

// <smpl>
@r@
local idexpression n;
expression e1,e2;
iterator name for_each_node_by_name, for_each_node_by_type,
for_each_compatible_node, for_each_matching_node,
for_each_matching_node_and_match, for_each_child_of_node,
for_each_available_child_of_node, for_each_node_with_property;
iterator i;
statement S;
expression list [n1] es;
@@

(
(
for_each_node_by_name(n,e1) S
|
for_each_node_by_type(n,e1) S
|
for_each_compatible_node(n,e1,e2) S
|
for_each_matching_node(n,e1) S
|
for_each_matching_node_and_match(n,e1,e2) S
|
for_each_child_of_node(e1,n) S
|
for_each_available_child_of_node(e1,n) S
|
for_each_node_with_property(n,e1) S
)
&
i(es,n,...) S
)

@@
local idexpression r.n;
iterator r.i;
expression e;
expression list [r.n1] es;
@@

i(es,n,...) {
...
(
of_node_put(n);
|
e = n
|
return n;
|
+ of_node_put(n);
? return ...;
)
...
}

@@
local idexpression r.n;
iterator r.i;
expression e;
expression list [r.n1] es;
@@

i(es,n,...) {
...
(
of_node_put(n);
|
e = n
|
+ of_node_put(n);
? break;
)
...
}
... when != n

@@
local idexpression r.n;
iterator r.i;
expression e;
identifier l;
expression list [r.n1] es;
@@

i(es,n,...) {
...
(
of_node_put(n);
|
e = n
|
+ of_node_put(n);
? goto l;
)
...
}
...
l: ... when != n
// </smpl>

This semantic patch puts an of_node_put before a return, but in each of
these patches, we have grouped the multiple resulting of_node_puts into a
single call at an error exit label.

---

drivers/phy/phy-bcm-cygnus-pcie.c | 16 ++++++++++++----
drivers/phy/phy-berlin-sata.c | 20 ++++++++++++++------
drivers/phy/phy-brcmstb-sata.c | 17 ++++++++++++-----
drivers/phy/phy-miphy28lp.c | 16 +++++++++++-----
drivers/phy/phy-miphy365x.c | 16 +++++++++++-----
drivers/phy/phy-mt65xx-usb3.c | 20 +++++++++++++-------
drivers/phy/phy-rockchip-usb.c | 17 ++++++++++++-----
7 files changed, 85 insertions(+), 37 deletions(-)


\
 
 \ /
  Last update: 2015-11-16 13:01    [W:0.097 / U:0.704 seconds]
©2003-2018 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site