fjes: Check for error irq

BugLink: https://bugs.launchpad.net/bugs/1956305
[ Upstream commit db6d6afe382de5a65d6ccf51253ab48b8e8336c3 ]

I find that platform_get_irq() will not always succeed.
It will return error irq in case of the failure.
Therefore, it might be better to check it if order to avoid the use of
error irq.

Fixes: 658d439b2292 ("fjes: Introduce FUJITSU Extended Socket Network Device driver")
Signed-off-by: Jiasheng Jiang <jiasheng@iscas.ac.cn>
Signed-off-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Sasha Levin <sashal@kernel.org>
Signed-off-by: Andrea Righi <andrea.righi@canonical.com>

diff --git a/drivers/net/fjes/fjes_main.c b/drivers/net/fjes/fjes_main.c
index 185c8a3986816ad02eae84ad8e05b126786d2477..1d1808afd5295e308da9fb9434f44da2e3c3abef 100644 (file)
--- a/drivers/net/fjes/fjes_main.c
+++ b/drivers/net/fjes/fjes_main.c
@@ -1261,6 +1261,11 @@ static int fjes_probe(struct platform_device *plat_dev)
        hw->hw_res.start = res->start;
        hw->hw_res.size = resource_size(res);
        hw->hw_res.irq = platform_get_irq(plat_dev, 0);
+       if (hw->hw_res.irq < 0) {
+               err = hw->hw_res.irq;
+               goto err_free_control_wq;
+       }
+
        err = fjes_hw_init(&adapter->hw);
        if (err)
                goto err_free_control_wq;