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

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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>
This commit is contained in:
Stefan Wahren 2021-05-08 14:36:33 +02:00 • committed by David S. Miller
parent 48de7c0c1c
commit b76078df15
1 changed files with 1 additions and 0 deletions
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1
drivers/net/ethernet/qualcomm/qca_spi.c
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@ -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,