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hp-wmi: check query return value in hp_wmi_perform_query 

Check BIOS provided return value code in hp_wmi_perform_query and print
a warning on error. Printing is suppressed for HPWMI_RET_UNKNOWN_CMDTYPE
which is returned when the command type is unsupported.

Signed-off-by: Anssi Hannula <anssi.hannula@iki.fi>
Signed-off-by: Matthew Garrett <mjg@redhat.com>
This commit is contained in:
Anssi Hannula 2011-02-20 20:07:20 +02:00 committed by Matthew Garrett
parent 7751ab8e60
commit 9af0e0fb70
1 changed files with 16 additions and 0 deletions
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16
drivers/platform/x86/hp-wmi.c
View File

@ -89,6 +89,13 @@ struct bios_return {
u32 value;
};
enum hp_return_value {
HPWMI_RET_WRONG_SIGNATURE = 0x02,
HPWMI_RET_UNKNOWN_COMMAND = 0x03,
HPWMI_RET_UNKNOWN_CMDTYPE = 0x04,
HPWMI_RET_INVALID_PARAMETERS = 0x05,
};
static const struct key_entry hp_wmi_keymap[] = {
{ KE_KEY, 0x02, { KEY_BRIGHTNESSUP } },
{ KE_KEY, 0x03, { KEY_BRIGHTNESSDOWN } },
@ -171,6 +178,15 @@ static int hp_wmi_perform_query(int query, int write, u32 *buffer,
bios_return = *((struct bios_return *)obj->buffer.pointer);
if (bios_return.return_code) {
if (bios_return.return_code != HPWMI_RET_UNKNOWN_CMDTYPE)
printk(KERN_WARNING PREFIX "query 0x%x returned "
"error 0x%x\n",
query, bios_return.return_code);
kfree(obj);
return bios_return.return_code;
}
memcpy(buffer, &bios_return.value, sizeof(bios_return.value));
kfree(obj);