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Commit 70eb0855 authored by Amit Daniel Kachhap's avatar Amit Daniel Kachhap Committed by Rafael J. Wysocki
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cpufreq: exynos5440: Protect OPP search calls with RCU lock 



As per the OPP library documentation(Documentation/power/opp.txt) all
OPP find/get calls should be protected by RCU locks.

Signed-off-by: default avatarAmit Daniel Kachhap <amit.daniel@samsung.com>
Signed-off-by: default avatarRafael J. Wysocki <rafael.j.wysocki@intel.com>
parent c7789669

drivers/cpufreq/exynos5440-cpufreq.c

+3 −0
Original line number Diff line number Diff line
@@ -120,11 +120,13 @@ static int init_div_table(void) 
	int i = 0;

	struct opp *opp;



	rcu_read_lock();

	for (i = 0; freq_tbl[i].frequency != CPUFREQ_TABLE_END; i++) {



		opp = opp_find_freq_exact(dvfs_info->dev,

					freq_tbl[i].frequency * 1000, true);

		if (IS_ERR(opp)) {

			rcu_read_unlock();

			dev_err(dvfs_info->dev,

				"failed to find valid OPP for %u KHZ\n",

				freq_tbl[i].frequency);
@@ -159,6 +161,7 @@ static int init_div_table(void) 
		__raw_writel(tmp, dvfs_info->base + XMU_PMU_P0_7 + 4 * i);

	}



	rcu_read_unlock();

	return 0;

}