[1/3,net-next] net: qca_spi: Avoid reading signature three times in a row

Message ID 1620477395-12740-2-git-send-email-stefan.wahren@i2se.com
State New
Headers show
Series
  • net: qca_spi: Improve sync handling
Related show

Commit Message

Stefan Wahren May 8, 2021, 12:36 p.m.
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>
---
 drivers/net/ethernet/qualcomm/qca_spi.c | 1 +
 1 file changed, 1 insertion(+)

Patch

diff --git a/drivers/net/ethernet/qualcomm/qca_spi.c b/drivers/net/ethernet/qualcomm/qca_spi.c
index ab9b025..3e2a54c 100644
--- 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,