diff options
| author | Anssi Hannula <anssi.hannula@iki.fi> | 2011-02-20 19:07:20 +0100 |
|---|---|---|
| committer | Matthew Garrett <mjg@redhat.com> | 2011-03-28 12:07:17 +0200 |
| commit | 9af0e0fb70ed8e2387323c19496a7e174363f7b6 (patch) | |
| tree | 637c967dbb194e1e8aed4177ef9bf03eb6c2ff30 /drivers/platform/x86/hp-wmi.c | |
| parent | sony-laptop: implement new backlight control method (diff) | |
| download | linux-9af0e0fb70ed8e2387323c19496a7e174363f7b6.tar.xz linux-9af0e0fb70ed8e2387323c19496a7e174363f7b6.zip | |
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>
Diffstat (limited to 'drivers/platform/x86/hp-wmi.c')
| -rw-r--r-- | drivers/platform/x86/hp-wmi.c | 16 |
1 files changed, 16 insertions, 0 deletions
diff --git a/drivers/platform/x86/hp-wmi.c b/drivers/platform/x86/hp-wmi.c index 9e05af9c41cb..87dfb2489762 100644 --- a/drivers/platform/x86/hp-wmi.c +++ b/drivers/platform/x86/hp-wmi.c @@ -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); |