fjes: Check for error irq

BugLink: https://bugs.launchpad.net/bugs/1958557
[ 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: Kamal Mostafa <kamal@canonical.com>
Signed-off-by: Stefan Bader <stefan.bader@canonical.com>

diff --git a/drivers/net/fjes/fjes_main.c b/drivers/net/fjes/fjes_main.c
index b89b4a3800a4d579da654f813670cf59a200a986..bef0133696c31a8bbf45b2f1b3d2b6725c72f175 100644 (file)
--- a/drivers/net/fjes/fjes_main.c
+++ b/drivers/net/fjes/fjes_main.c
@@ -1269,6 +1269,11 @@ 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;