diff options
| author | Li Jun <jun.li@freescale.com> | 2015-07-29 13:11:11 +0800 |
|---|---|---|
| committer | Peter Chen <peter.chen@freescale.com> | 2015-08-14 09:13:12 +0800 |
| commit | bc24937943d9f71a1e32b5dc4e2f0ef8fcc07b64 (patch) | |
| tree | edefe3e6c6b3d3e8b0086d8e439d70d713d9bf93 /drivers/usb/chipidea/debug.c | |
| parent | 158ec071fb5243e5c49259d2dbc4c8dbaed24c47 (diff) | |
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>
Diffstat (limited to 'drivers/usb/chipidea/debug.c')
| -rw-r--r-- | drivers/usb/chipidea/debug.c | 6 |
1 files changed, 6 insertions, 0 deletions
diff --git a/drivers/usb/chipidea/debug.c b/drivers/usb/chipidea/debug.c index 5b7061a33103..64b6a4735876 100644 --- a/drivers/usb/chipidea/debug.c +++ b/drivers/usb/chipidea/debug.c @@ -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; } |