net: qca_spi: Avoid reading signature three times in a row

There is no need to read the signature three times. So bail out
in case the second check failed.

Signed-off-by: Stefan Wahren <stefan.wahren@i2se.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

diff --git a/drivers/net/ethernet/qualcomm/qca_spi.c b/drivers/net/ethernet/qualcomm/qca_spi.c
index ab9b025..3e2a54c 100644 (file)
--- a/drivers/net/ethernet/qualcomm/qca_spi.c
+++ b/drivers/net/ethernet/qualcomm/qca_spi.c
@@ -506,6 +506,7 @@ qcaspi_qca7k_sync(struct qcaspi *qca, int event)
                if (signature != QCASPI_GOOD_SIGNATURE) {
                        qca->sync = QCASPI_SYNC_UNKNOWN;
                        netdev_dbg(qca->net_dev, "sync: got CPU on, but signature was invalid, restart\n");
+                       return;
                } else {
                        /* ensure that the WRBUF is empty */
                        qcaspi_read_register(qca, SPI_REG_WRBUF_SPC_AVA,