linux-kernel - [PATCH net-next v2] net: sfp: Unique GPIO interrupt names

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Date:   Mon, 6 Jul 2020 17:24:04 -0700
From:   Chris Healy <cphealy@...il.com>
To:     Andrew Lunn <andrew@...n.ch>,
        Florian Fainelli <f.fainelli@...il.com>,
        Heiner Kallweit <hkallweit1@...il.com>,
        "David S. Miller" <davem@...emloft.net>, kuba@...nel.org,
        Russell King - ARM Linux <linux@...linux.org.uk>,
        netdev <netdev@...r.kernel.org>,
        linux-kernel <linux-kernel@...r.kernel.org>
Subject: [PATCH net-next v2] net: sfp: Unique GPIO interrupt names

Dynamically generate a unique GPIO interrupt name, based on the
device name and the GPIO name.  For example:

103:          0   sx1503q  12 Edge      sff2-los
104:          0   sx1503q  13 Edge      sff2-tx-fault

The sffX indicates the SFP the los and tx-fault are associated with.

Signed-off-by: Chris Healy <cphealy@...il.com>

v2:
- added net-next to PATCH part of subject line
- switched to devm_kasprintf()
---
 drivers/net/phy/sfp.c | 7 ++++++-
 1 file changed, 6 insertions(+), 1 deletion(-)

diff --git a/drivers/net/phy/sfp.c b/drivers/net/phy/sfp.c
index 73c2969f11a4..193a124c26c4 100644
--- a/drivers/net/phy/sfp.c
+++ b/drivers/net/phy/sfp.c
@@ -2239,6 +2239,7 @@ static int sfp_probe(struct platform_device *pdev)
     const struct sff_data *sff;
     struct i2c_adapter *i2c;
     struct sfp *sfp;
+    char *sfp_irq_name;
     int err, i;

     sfp = sfp_alloc(&pdev->dev);
@@ -2349,12 +2350,16 @@ static int sfp_probe(struct platform_device *pdev)
             continue;
         }

+        sfp_irq_name = devm_kasprintf(sfp->dev, GFP_KERNEL,
+                          "%s-%s", dev_name(sfp->dev),
+                          gpio_of_names[i]);
+
         err = devm_request_threaded_irq(sfp->dev, sfp->gpio_irq[i],
                         NULL, sfp_irq,
                         IRQF_ONESHOT |
                         IRQF_TRIGGER_RISING |
                         IRQF_TRIGGER_FALLING,
-                        dev_name(sfp->dev), sfp);
+                        sfp_irq_name, sfp);
         if (err) {
             sfp->gpio_irq[i] = 0;
             sfp->need_poll = true;
-- 
2.21.3