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Commit 2673c836 authored by Vojtech Pavlik's avatar Vojtech Pavlik Committed by Dmitry Torokhov
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Input: Only write the CTR in i8042 resume function. Reading it is


       wrong, since it may (will) contain nonsensical data.

Signed-off-by: default avatarVojtech Pavlik <vojtech@suse.cz>
Signed-off-by: default avatarDmitry Torokhov <dtor@mail.ru>
parent be156923
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+28 −20
Original line number Diff line number Diff line
@@ -698,6 +698,26 @@ static void i8042_timer_func(unsigned long data)
	i8042_interrupt(0, NULL, NULL);
}

static int i8042_ctl_test(void)
{
	unsigned char param;

	if (!i8042_reset)
		return 0;

	if (i8042_command(&param, I8042_CMD_CTL_TEST)) {
		printk(KERN_ERR "i8042.c: i8042 controller self test timeout.\n");
		return -1;
	}

	if (param != I8042_RET_CTL_TEST) {
		printk(KERN_ERR "i8042.c: i8042 controller selftest failed. (%#x != %#x)\n",
			 param, I8042_RET_CTL_TEST);
		return -1;
	}

	return 0;
}

/*
 * i8042_controller init initializes the i8042 controller, and,
@@ -719,21 +739,8 @@ static int i8042_controller_init(void)
		return -1;
	}

	if (i8042_reset) {

		unsigned char param;

		if (i8042_command(&param, I8042_CMD_CTL_TEST)) {
			printk(KERN_ERR "i8042.c: i8042 controller self test timeout.\n");
	if (i8042_ctl_test())
		return -1;
		}

		if (param != I8042_RET_CTL_TEST) {
			printk(KERN_ERR "i8042.c: i8042 controller selftest failed. (%#x != %#x)\n",
				 param, I8042_RET_CTL_TEST);
			return -1;
		}
	}

/*
 * Save the CTR for restoral on unload / reboot.
@@ -806,9 +813,7 @@ static void i8042_controller_reset(void)
 * Reset the controller if requested.
 */

	if (i8042_reset)
		if (i8042_command(&param, I8042_CMD_CTL_TEST))
			printk(KERN_ERR "i8042.c: i8042 controller reset timeout.\n");
	i8042_ctl_test();

/*
 * Disable MUX mode if present.
@@ -920,8 +925,11 @@ static int i8042_resume(struct device *dev, u32 level)
	if (level != RESUME_ENABLE)
		return 0;

	if (i8042_controller_init()) {
		printk(KERN_ERR "i8042: resume failed\n");
	if (i8042_ctl_test())
		return -1;

	if (i8042_command(&i8042_ctr, I8042_CMD_CTL_WCTR)) {
		printk(KERN_ERR "i8042: Can't write CTR\n");
		return -1;
	}