brcmfmac: fix error handling of irq_of_parse_and_map

Return value of irq_of_parse_and_map() is unsigned int, with 0
indicating failure, so testing for negative result never works.

Signed-off-by: Dmitry Torokhov <dtor@chromium.org>
Cc: stable@vger.kernel.org # v3.17
Acked-by: Arend van Spriel <arend@broadcom.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>

diff --git a/drivers/net/wireless/brcm80211/brcmfmac/of.c b/drivers/net/wireless/brcm80211/brcmfmac/of.c
index f05f527..927bffd 100644 (file)
--- a/drivers/net/wireless/brcm80211/brcmfmac/of.c
+++ b/drivers/net/wireless/brcm80211/brcmfmac/of.c
@@ -40,8 +40,8 @@ void brcmf_of_probe(struct brcmf_sdio_dev *sdiodev)
                return;
 
        irq = irq_of_parse_and_map(np, 0);
-       if (irq < 0) {
-               brcmf_err("interrupt could not be mapped: err=%d\n", irq);
+       if (!irq) {
+               brcmf_err("interrupt could not be mapped\n");
                devm_kfree(dev, sdiodev->pdata);
                return;
        }