net: ethernet: ti: am65-cpsw: Fix PM runtime leakage in am65_cpsw_nuss_ndo_slave_open()

Ensure pm_runtime_put() is issued in error path.

Reported-by: Jakub Kicinski <kuba@kernel.org>
Fixes: 93a76530316a ("net: ethernet: ti: introduce am65x/j721e gigabit eth subsystem driver")
Signed-off-by: Roger Quadros <rogerq@kernel.org>
Reviewed-by: Saeed Mahameed <saeed@kernel.org>
Link: https://lore.kernel.org/r/20221208105534.63709-1-rogerq@kernel.org
Signed-off-by: Jakub Kicinski <kuba@kernel.org>

diff --git a/drivers/net/ethernet/ti/am65-cpsw-nuss.c b/drivers/net/ethernet/ti/am65-cpsw-nuss.c
index de112ab..9decb0c 100644 (file)
--- a/drivers/net/ethernet/ti/am65-cpsw-nuss.c
+++ b/drivers/net/ethernet/ti/am65-cpsw-nuss.c
@@ -573,20 +573,21 @@ static int am65_cpsw_nuss_ndo_slave_open(struct net_device *ndev)
        reg = cpsw_sl_reg_read(port->slave.mac_sl, CPSW_SL_SOFT_RESET);
        if (reg) {
                dev_err(common->dev, "soft RESET didn't complete\n");
-               return -ETIMEDOUT;
+               ret = -ETIMEDOUT;
+               goto runtime_put;
        }
 
        /* Notify the stack of the actual queue counts. */
        ret = netif_set_real_num_tx_queues(ndev, common->tx_ch_num);
        if (ret) {
                dev_err(common->dev, "cannot set real number of tx queues\n");
-               return ret;
+               goto runtime_put;
        }
 
        ret = netif_set_real_num_rx_queues(ndev, AM65_CPSW_MAX_RX_QUEUES);
        if (ret) {
                dev_err(common->dev, "cannot set real number of rx queues\n");
-               return ret;
+               goto runtime_put;
        }
 
        for (i = 0; i < common->tx_ch_num; i++)
@@ -594,7 +595,7 @@ static int am65_cpsw_nuss_ndo_slave_open(struct net_device *ndev)
 
        ret = am65_cpsw_nuss_common_open(common);
        if (ret)
-               return ret;
+               goto runtime_put;
 
        common->usage_count++;
 
@@ -622,6 +623,10 @@ static int am65_cpsw_nuss_ndo_slave_open(struct net_device *ndev)
 error_cleanup:
        am65_cpsw_nuss_ndo_slave_stop(ndev);
        return ret;
+
+runtime_put:
+       pm_runtime_put(common->dev);
+       return ret;
 }
 
 static void am65_cpsw_nuss_rx_cleanup(void *data, dma_addr_t desc_dma)