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dell-laptop: Block software state changes when rfkill hard blocked

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The "hardware" switch is tied directly to a BIOS interface that will
connect and disconnect the hardware from the bus.

If you use the software interface to request the BIOS to make these
changes, the HW switch will be in an inconsistent state and LEDs may not
reflect the state of the HW.

Signed-off-by: Mario Limonciello <Mario_Limonciello@Dell.com>
This commit is contained in:
Mario Limonciello 2010-02-09 14:11:05 -05:00 committed by Matthew Garrett
parent e551260b23
commit ec1722a214
1 changed files with 4 additions and 0 deletions
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4
drivers/platform/x86/dell-laptop.c
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@ -190,6 +190,10 @@ static int dell_rfkill_set(void *data, bool blocked)
unsigned long radio = (unsigned long)data;
memset(&buffer, 0, sizeof(struct calling_interface_buffer));
dell_send_request(&buffer, 17, 11);
if (!(buffer.output[1] & BIT(16)))
return -EINVAL;
buffer.input[0] = (1 | (radio<<8) | (disable << 16));
dell_send_request(&buffer, 17, 11);