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clamp min/max values properly.

This commit is contained in:
christos 2008-01-06 19:42:03 +00:00
parent c04c9a55d0
commit d1b79165fa
1 changed files with 12 additions and 6 deletions
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18
sys/dev/acpi/sony_acpi.c
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@ -1,4 +1,4 @@
/* $NetBSD: sony_acpi.c,v 1.2 2007/12/23 18:03:02 jmcneill Exp $ */
/* $NetBSD: sony_acpi.c,v 1.3 2008/01/06 19:42:03 christos Exp $ */
/*-
* Copyright (c) 2005 The NetBSD Foundation, Inc.
@ -36,7 +36,7 @@
* POSSIBILITY OF SUCH DAMAGE.
*/
#include <sys/cdefs.h>
__KERNEL_RCSID(0, "$NetBSD: sony_acpi.c,v 1.2 2007/12/23 18:03:02 jmcneill Exp $");
__KERNEL_RCSID(0, "$NetBSD: sony_acpi.c,v 1.3 2008/01/06 19:42:03 christos Exp $");
#include <sys/param.h>
#include <sys/systm.h>
@ -424,9 +424,12 @@ sony_acpi_brightness_up(device_t dv)
ACPI_STATUS rv;
rv = acpi_eval_integer(sc->sc_node->ad_handle, "GBRT", &arg);
if (ACPI_FAILURE(rv) || arg > 8)
if (ACPI_FAILURE(rv))
return;
arg++;
if (arg >= 8)
arg = 8;
else
arg++;
sony_acpi_eval_set_integer(sc->sc_node->ad_handle, "SBRT", arg, NULL);
}
@ -438,9 +441,12 @@ sony_acpi_brightness_down(device_t dv)
ACPI_STATUS rv;
rv = acpi_eval_integer(sc->sc_node->ad_handle, "GBRT", &arg);
if (ACPI_FAILURE(rv) || arg == 0)
if (ACPI_FAILURE(rv))
return;
arg--;
if (arg <= 0)
arg = 0;
else
arg--;
sony_acpi_eval_set_integer(sc->sc_node->ad_handle, "SBRT", arg, NULL);
}