From cfc708dbe4022324bcd2bcb5817dd29f1f91299d Mon Sep 17 00:00:00 2001 From: "Mark A. Greer" Date: Tue, 2 Sep 2014 15:12:40 -0700 Subject: NFC: trf7970a: Don't turn off RF if its already off Don't try to turn off of RF transmitter is its already off. Signed-off-by: Mark A. Greer Signed-off-by: Samuel Ortiz --- drivers/nfc/trf7970a.c | 4 ++++ 1 file changed, 4 insertions(+) (limited to 'drivers/nfc/trf7970a.c') diff --git a/drivers/nfc/trf7970a.c b/drivers/nfc/trf7970a.c index e4671e54424a..429146b7e6d8 100644 --- a/drivers/nfc/trf7970a.c +++ b/drivers/nfc/trf7970a.c @@ -859,6 +859,10 @@ err_out: static void trf7970a_switch_rf_off(struct trf7970a *trf) { + if ((trf->state == TRF7970A_ST_PWR_OFF) || + (trf->state == TRF7970A_ST_RF_OFF)) + return; + dev_dbg(trf->dev, "Switching rf off\n"); trf->chip_status_ctrl &= ~TRF7970A_CHIP_STATUS_RF_ON; -- cgit v1.2.3