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OMAP2 clock: fix recursive spinlock attempt when CONFIG_CPU_FREQ=y 

The OMAP2 MPU virtual clock node code attempted to call clk_get_rate()
while the clockfw_lock spinlock was held.  Fix by reading the sys_ck
rate directly.

Signed-off-by: Paul Walmsley <paul@pwsan.com>
This commit is contained in:
Paul Walmsley 2010-05-18 20:24:06 -06:00
parent 4788da268f
commit 59dd722489
1 changed files with 4 additions and 13 deletions
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17
arch/arm/mach-omap2/clkt2xxx_virt_prcm_set.c
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@ -68,16 +68,13 @@ long omap2_round_to_table_rate(struct clk *clk, unsigned long rate)
{
const struct prcm_config *ptr;
long highest_rate;
long sys_ck_rate;
sys_ck_rate = clk_get_rate(sclk);
highest_rate = -EINVAL;
for (ptr = rate_table; ptr->mpu_speed; ptr++) {
if (!(ptr->flags & cpu_mask))
continue;
if (ptr->xtal_speed != sys_ck_rate)
if (ptr->xtal_speed != sclk->rate)
continue;
highest_rate = ptr->mpu_speed;
@ -96,15 +93,12 @@ int omap2_select_table_rate(struct clk *clk, unsigned long rate)
const struct prcm_config *prcm;
unsigned long found_speed = 0;
unsigned long flags;
long sys_ck_rate;
sys_ck_rate = clk_get_rate(sclk);
for (prcm = rate_table; prcm->mpu_speed; prcm++) {
if (!(prcm->flags & cpu_mask))
continue;
if (prcm->xtal_speed != sys_ck_rate)
if (prcm->xtal_speed != sclk->rate)
continue;
if (prcm->mpu_speed <= rate) {
@ -181,19 +175,16 @@ static struct cpufreq_frequency_table *freq_table;
void omap2_clk_init_cpufreq_table(struct cpufreq_frequency_table **table)
{
const struct prcm_config *prcm;
long sys_ck_rate;
int i = 0;
int tbl_sz = 0;
if (!cpu_is_omap24xx())
return;
sys_ck_rate = clk_get_rate(sclk);
for (prcm = rate_table; prcm->mpu_speed; prcm++) {
if (!(prcm->flags & cpu_mask))
continue;
if (prcm->xtal_speed != sys_ck_rate)
if (prcm->xtal_speed != sclk->rate)
continue;
/* don't put bypass rates in table */
@ -226,7 +217,7 @@ void omap2_clk_init_cpufreq_table(struct cpufreq_frequency_table **table)
for (prcm = rate_table; prcm->mpu_speed; prcm++) {
if (!(prcm->flags & cpu_mask))
continue;
if (prcm->xtal_speed != sys_ck_rate)
if (prcm->xtal_speed != sclk->rate)
continue;
/* don't put bypass rates in table */