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rt2x00 : bail out of regbusy_read if device is removed.

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platform rfkill is async thus we may try to read while the device is
already off.

Signed-off-by: Alban Browaeys <prahal@yahoo.com>
Acked-by: Gertjan van Wingerde <gwingerde@gmail.com>
Acked-by: Ivo van Doorn <ivdoorn@gmail.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
This commit is contained in:
Alban Browaeys 2009-12-04 23:46:57 +01:00 committed by John W. Linville
parent 050e8a47dc
commit c70762f9ac
1 changed files with 3 additions and 0 deletions
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3
drivers/net/wireless/rt2x00/rt2x00pci.c
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@ -41,6 +41,9 @@ int rt2x00pci_regbusy_read(struct rt2x00_dev *rt2x00dev,
{
unsigned int i;
if (!test_bit(DEVICE_STATE_PRESENT, &rt2x00dev->flags))
return 0;
for (i = 0; i < REGISTER_BUSY_COUNT; i++) {
rt2x00pci_register_read(rt2x00dev, offset, reg);
if (!rt2x00_get_field32(*reg, field))