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usb: chipidea: debug: add runtime pm for register access 

Add runtime pm operations for registers access to avoid system hang.

Signed-off-by: Li Jun <jun.li@freescale.com>
This commit is contained in:
Li Jun 2015-07-29 13:11:11 +08:00 committed by Peter Chen
parent 158ec071fb
commit bc24937943
1 changed files with 6 additions and 0 deletions
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6
drivers/usb/chipidea/debug.c
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@ -66,9 +66,11 @@ static int ci_port_test_show(struct seq_file *s, void *data)
unsigned long flags;
unsigned mode;
pm_runtime_get_sync(ci->dev);
spin_lock_irqsave(&ci->lock, flags);
mode = hw_port_test_get(ci);
spin_unlock_irqrestore(&ci->lock, flags);
pm_runtime_put_sync(ci->dev);
seq_printf(s, "mode = %u\n", mode);
@ -98,9 +100,11 @@ static ssize_t ci_port_test_write(struct file *file, const char __user *ubuf,
if (sscanf(buf, "%u", &mode) != 1)
return -EINVAL;
pm_runtime_get_sync(ci->dev);
spin_lock_irqsave(&ci->lock, flags);
ret = hw_port_test_set(ci, mode);
spin_unlock_irqrestore(&ci->lock, flags);
pm_runtime_put_sync(ci->dev);
return ret ? ret : count;
}
@ -316,8 +320,10 @@ static ssize_t ci_role_write(struct file *file, const char __user *ubuf,
if (role == CI_ROLE_END || role == ci->role)
return -EINVAL;
pm_runtime_get_sync(ci->dev);
ci_role_stop(ci);
ret = ci_role_start(ci, role);
pm_runtime_put_sync(ci->dev);
return ret ? ret : count;
}