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Simplify a function for getting brightness levels.

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This commit is contained in:
jkim 2010-06-11 19:58:41 +00:00
parent c2f9691170
commit 088f0f9106
1 changed files with 7 additions and 12 deletions
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19
sys/dev/acpica/acpi_video.c
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@ -944,39 +944,34 @@ vo_get_brightness_levels(ACPI_HANDLE handle, int **levelp)
if (status != AE_NOT_FOUND)
printf("can't evaluate %s._BCL - %s\n",
acpi_name(handle), AcpiFormatException(status));
num = -1;
goto out;
}
res = (ACPI_OBJECT *)bcl_buf.Pointer;
if (!ACPI_PKG_VALID(res, 2)) {
printf("evaluation of %s._BCL makes no sense\n",
acpi_name(handle));
num = -1;
goto out;
}
num = res->Package.Count;
if (levelp == NULL)
if (num < 2 || levelp == NULL)
goto out;
levels = AcpiOsAllocate(num * sizeof(*levels));
if (levels == NULL) {
num = -1;
if (levels == NULL)
goto out;
}
for (i = 0, n = 0; i < num; i++)
if (acpi_PkgInt32(res, i, &levels[n]) == 0)
n++;
if (n < 2) {
num = -1;
AcpiOsFree(levels);
} else {
num = n;
*levelp = levels;
goto out;
}
*levelp = levels;
return (n);
out:
if (bcl_buf.Pointer != NULL)
AcpiOsFree(bcl_buf.Pointer);
return (num);
return (0);
}
static int