AcoSail/kernel_optimize_test
8
0
Fork 0
forked from luck/tmp_suning_uos_patched
Code Pull Requests Activity

clk: get matching entry under lock in of_clk_init()

Browse Source 
Currently of_clk_init() finds a matching device node while holding
the device tree spinlock.  When a matching device node is found, the
lock is dropped and then re-acquired in order to get a reference
to the matching device id structure.

Acquiring the spinlock twice is unnecessary (and it opens a
vulnerable window that could conceivably lead to errors).

There already exists an interface for both finding and taking a
reference to a device id under lock, so use it.

Signed-off-by: Alex Elder <elder@linaro.org>
Reviewed-by: Christian Daudt <csd@broadcom.com>
Reviewed-by: Markus Mayer <markus.mayer@linaro.org>
Reviewed-by: Matt Porter <matt.porter@linaro.org>
Signed-off-by: Mike Turquette <mturquette@linaro.org>
This commit is contained in:
Alex Elder 2013-08-22 11:31:31 -05:00 committed by Mike Turquette
parent 1ec5502ef2
commit 7f7ed584d1
1 changed files with 2 additions and 2 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

4
drivers/clk/clk.c
View File

@ -2228,13 +2228,13 @@ EXPORT_SYMBOL_GPL(of_clk_get_parent_name);
*/ */
void __init of_clk_init(const struct of_device_id *matches) void __init of_clk_init(const struct of_device_id *matches)
{ {
const struct of_device_id *match;
struct device_node *np; struct device_node *np;
if (!matches) if (!matches)
matches = __clk_of_table; matches = __clk_of_table;
for_each_matching_node(np, matches) { for_each_matching_node_and_match(np, matches, &match) {
const struct of_device_id *match = of_match_node(matches, np);
of_clk_init_cb_t clk_init_cb = match->data; of_clk_init_cb_t clk_init_cb = match->data;
clk_init_cb(np); clk_init_cb(np);
} }