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| author | Vladimir Lebedev <vladimir.p.lebedev@intel.com> | 2007-02-10 01:43:48 -0500 |
|---|---|---|
| committer | Len Brown <len.brown@intel.com> | 2007-02-10 01:43:48 -0500 |
| commit | 4bd35cdb1e2d1a1bbbe4b75132718e79b80519ab (patch) | |
| tree | 1e2739dcc56d06f87ef4113db5b4dddf1cacf7f0 /drivers/acpi/battery.c | |
| parent | eaefd5fb7d793c9c1bcef1b0c0d5ec3824a85b91 (diff) | |
| download | lwn-4bd35cdb1e2d1a1bbbe4b75132718e79b80519ab.tar.gz lwn-4bd35cdb1e2d1a1bbbe4b75132718e79b80519ab.zip | |
ACPI: battery: check for battery present on /proc/battery access
http://bugzilla.kernel.org/show_bug.cgi?id=7200
Signed-off-by: Vladimir Lebedev <vladimir.p.lebedev@intel.com>
Signed-off-by: Len Brown <len.brown@intel.com>
Diffstat (limited to 'drivers/acpi/battery.c')
| -rw-r--r-- | drivers/acpi/battery.c | 15 |
1 files changed, 15 insertions, 0 deletions
diff --git a/drivers/acpi/battery.c b/drivers/acpi/battery.c index 2f4521a48fe7..0d7a32e502d1 100644 --- a/drivers/acpi/battery.c +++ b/drivers/acpi/battery.c @@ -324,6 +324,13 @@ static int acpi_battery_check(struct acpi_battery *battery) return result; } +static void acpi_battery_check_present(struct acpi_battery *battery) +{ + if (!battery->flags.present) { + acpi_battery_check(battery); + } +} + /* -------------------------------------------------------------------------- FS Interface (/proc) -------------------------------------------------------------------------- */ @@ -340,6 +347,8 @@ static int acpi_battery_read_info(struct seq_file *seq, void *offset) if (!battery) goto end; + acpi_battery_check_present(battery); + if (battery->flags.present) seq_printf(seq, "present: yes\n"); else { @@ -424,6 +433,8 @@ static int acpi_battery_read_state(struct seq_file *seq, void *offset) if (!battery) goto end; + acpi_battery_check_present(battery); + if (battery->flags.present) seq_printf(seq, "present: yes\n"); else { @@ -499,6 +510,8 @@ static int acpi_battery_read_alarm(struct seq_file *seq, void *offset) if (!battery) goto end; + acpi_battery_check_present(battery); + if (!battery->flags.present) { seq_printf(seq, "present: no\n"); goto end; @@ -536,6 +549,8 @@ acpi_battery_write_alarm(struct file *file, if (!battery || (count > sizeof(alarm_string) - 1)) return -EINVAL; + acpi_battery_check_present(battery); + if (!battery->flags.present) return -ENODEV; |