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Message-Id: <1472747141-15886-3-git-send-email-jeremy.linton@arm.com>
Date: Thu, 1 Sep 2016 11:25:41 -0500
From: Jeremy Linton <jeremy.linton@....com>
To: netdev@...r.kernel.org
Cc: steve.glendinning@...well.net, sergei.shtylyov@...entembedded.com
Subject: [PATCH 2/2] net/smsc911x: Move interrupt allocation to open/stop
The /proc/irq/xx information is incorrect for smsc911x because
the request_irq is happening before the register_netdev has the
proper device name. Moving it to the open also fixes the case
of when the device is renamed.
Reported-by: Will Deacon <will.deacon@....com>
Signed-off-by: Jeremy Linton <jeremy.linton@....com>
---
drivers/net/ethernet/smsc/smsc911x.c | 50 +++++++++++++++---------------------
1 file changed, 20 insertions(+), 30 deletions(-)
diff --git a/drivers/net/ethernet/smsc/smsc911x.c b/drivers/net/ethernet/smsc/smsc911x.c
index 6d6dcfe..8ef9776 100644
--- a/drivers/net/ethernet/smsc/smsc911x.c
+++ b/drivers/net/ethernet/smsc/smsc911x.c
@@ -154,6 +154,8 @@ struct smsc911x_data {
/* Easy access to information */
#define __smsc_shift(pdata, reg) ((reg) << ((pdata)->config.shift))
+static irqreturn_t smsc911x_irqhandler(int irq, void *dev_id);
+
static inline u32 __smsc911x_reg_read(struct smsc911x_data *pdata, u32 reg)
{
if (pdata->config.flags & SMSC911X_USE_32BIT)
@@ -1514,6 +1516,7 @@ static int smsc911x_open(struct net_device *dev)
unsigned int temp;
unsigned int intcfg;
int retval;
+ int irq_flags;
/* find and start the given phy */
if (!dev->phydev) {
@@ -1584,6 +1587,14 @@ static int smsc911x_open(struct net_device *dev)
pdata->software_irq_signal = 0;
smp_wmb();
+ irq_flags = irq_get_trigger_type(dev->irq);
+ if (request_irq(dev->irq, smsc911x_irqhandler,
+ irq_flags | IRQF_SHARED, dev->name, dev)) {
+ SMSC_WARN(pdata, probe,
+ "Unable to claim requested irq: %d", dev->irq);
+ goto mii_free_out;
+ }
+
temp = smsc911x_reg_read(pdata, INT_EN);
temp |= INT_EN_SW_INT_EN_;
smsc911x_reg_write(pdata, INT_EN, temp);
@@ -1599,7 +1610,7 @@ static int smsc911x_open(struct net_device *dev)
netdev_warn(dev, "ISR failed signaling test (IRQ %d)\n",
dev->irq);
retval = -ENODEV;
- goto mii_free_out;
+ goto irq_stop_out;
}
SMSC_TRACE(pdata, ifup, "IRQ handler passed test using IRQ %d",
dev->irq);
@@ -1645,7 +1656,8 @@ static int smsc911x_open(struct net_device *dev)
netif_start_queue(dev);
return 0;
-
+irq_stop_out:
+ free_irq(dev->irq, dev);
mii_free_out:
phy_disconnect(dev->phydev);
dev->phydev = NULL;
@@ -1672,12 +1684,15 @@ static int smsc911x_stop(struct net_device *dev)
dev->stats.rx_dropped += smsc911x_reg_read(pdata, RX_DROP);
smsc911x_tx_update_txcounters(dev);
+ free_irq(dev->irq, dev);
+
/* Bring the PHY down */
if (dev->phydev) {
phy_stop(dev->phydev);
phy_disconnect(dev->phydev);
dev->phydev = NULL;
}
+ netif_carrier_off(dev);
SMSC_TRACE(pdata, ifdown, "Interface stopped");
return 0;
@@ -2307,7 +2322,6 @@ static int smsc911x_drv_remove(struct platform_device *pdev)
mdiobus_free(pdata->mii_bus);
unregister_netdev(dev);
- free_irq(dev->irq, dev);
res = platform_get_resource_byname(pdev, IORESOURCE_MEM,
"smsc911x-memory");
if (!res)
@@ -2392,8 +2406,7 @@ static int smsc911x_drv_probe(struct platform_device *pdev)
struct smsc911x_data *pdata;
struct smsc911x_platform_config *config = dev_get_platdata(&pdev->dev);
struct resource *res;
- unsigned int intcfg = 0;
- int res_size, irq, irq_flags;
+ int res_size, irq;
int retval;
res = platform_get_resource_byname(pdev, IORESOURCE_MEM,
@@ -2432,7 +2445,6 @@ static int smsc911x_drv_probe(struct platform_device *pdev)
pdata = netdev_priv(dev);
dev->irq = irq;
- irq_flags = irq_get_trigger_type(irq);
pdata->ioaddr = ioremap_nocache(res->start, res_size);
pdata->dev = dev;
@@ -2479,38 +2491,18 @@ static int smsc911x_drv_probe(struct platform_device *pdev)
if (retval < 0)
goto out_disable_resources;
- /* configure irq polarity and type before connecting isr */
- if (pdata->config.irq_polarity == SMSC911X_IRQ_POLARITY_ACTIVE_HIGH)
- intcfg |= INT_CFG_IRQ_POL_;
-
- if (pdata->config.irq_type == SMSC911X_IRQ_TYPE_PUSH_PULL)
- intcfg |= INT_CFG_IRQ_TYPE_;
-
- smsc911x_reg_write(pdata, INT_CFG, intcfg);
-
- /* Ensure interrupts are globally disabled before connecting ISR */
- smsc911x_disable_irq_chip(dev);
-
- retval = request_irq(dev->irq, smsc911x_irqhandler,
- irq_flags | IRQF_SHARED, dev->name, dev);
- if (retval) {
- SMSC_WARN(pdata, probe,
- "Unable to claim requested irq: %d", dev->irq);
- goto out_disable_resources;
- }
-
netif_carrier_off(dev);
retval = smsc911x_mii_init(pdev, dev);
if (retval) {
SMSC_WARN(pdata, probe, "Error %i initialising mii", retval);
- goto out_free_irq;
+ goto out_disable_resources;
}
retval = register_netdev(dev);
if (retval) {
SMSC_WARN(pdata, probe, "Error %i registering device", retval);
- goto out_free_irq;
+ goto out_disable_resources;
} else {
SMSC_TRACE(pdata, probe,
"Network interface: \"%s\"", dev->name);
@@ -2551,8 +2543,6 @@ static int smsc911x_drv_probe(struct platform_device *pdev)
return 0;
-out_free_irq:
- free_irq(dev->irq, dev);
out_disable_resources:
pm_runtime_put(&pdev->dev);
pm_runtime_disable(&pdev->dev);
--
2.5.5
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