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Commit 0fa94e01 authored by Li Jun's avatar Li Jun Committed by Sasha Levin
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usb: chipidea: debug: add runtime pm for register access 



[ Upstream commit bc24937943d9f71a1e32b5dc4e2f0ef8fcc07b64 ]

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

Signed-off-by: default avatarLi Jun <jun.li@freescale.com>
Signed-off-by: default avatarSasha Levin <sasha.levin@oracle.com>
parent 39a86be1

drivers/usb/chipidea/debug.c

+6 −0
Original line number Diff line number Diff line
@@ -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);
@@ -94,9 +96,11 @@ 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;

}
@@ -312,8 +316,10 @@ 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;

}