[PATCH net-next] r8169: don't use pci_irq_vector() in atomic context

Subsystems: 8169 10/100/1000 gigabit ethernet driver, networking drivers, the rest

STALE1745d LANDED

Landed in mainline as 1bd327718841 on 2021-12-28.

4 messages, 3 authors, 2021-12-29 · open the first message on its own page

[PATCH net-next] r8169: don't use pci_irq_vector() in atomic context

From: Heiner Kallweit <hkallweit1@gmail.com>
Date: 2021-12-28 21:02:41

From: Thomas Gleixner <redacted>

Since referenced change pci_irq_vector() can't be used in atomic
context any longer. This conflicts with our usage of this function
in rtl8169_netpoll(). Therefore store the interrupt number in
struct rtl8169_private.

Fixes: 495c66aca3da ("genirq/msi: Convert to new functions")
Signed-off-by: Thomas Gleixner <redacted>
Signed-off-by: Heiner Kallweit <hkallweit1@gmail.com>
---
 drivers/net/ethernet/realtek/r8169_main.c | 14 +++++++-------
 1 file changed, 7 insertions(+), 7 deletions(-)

diff --git a/drivers/net/ethernet/realtek/r8169_main.c b/drivers/net/ethernet/realtek/r8169_main.c
index 3d6843332..7161a5b1c 100644
--- a/drivers/net/ethernet/realtek/r8169_main.c
+++ b/drivers/net/ethernet/realtek/r8169_main.c

@@ -615,6 +615,7 @@ struct rtl8169_private {
 	struct ring_info tx_skb[NUM_TX_DESC];	/* Tx data buffers */
 	u16 cp_cmd;
 	u32 irq_mask;
+	int irq;
 	struct clk *clk;
 
 	struct {

@@ -4712,7 +4713,7 @@ static int rtl8169_close(struct net_device *dev)
 
 	cancel_work_sync(&tp->wk.work);
 
-	free_irq(pci_irq_vector(pdev, 0), tp);
+	free_irq(tp->irq, tp);
 
 	phy_disconnect(tp->phydev);

@@ -4733,7 +4734,7 @@ static void rtl8169_netpoll(struct net_device *dev)
 {
 	struct rtl8169_private *tp = netdev_priv(dev);
 
-	rtl8169_interrupt(pci_irq_vector(tp->pci_dev, 0), tp);
+	rtl8169_interrupt(tp->irq, tp);
 }
 #endif

@@ -4767,8 +4768,7 @@ static int rtl_open(struct net_device *dev)
 	rtl_request_firmware(tp);
 
 	irqflags = pci_dev_msi_enabled(pdev) ? IRQF_NO_THREAD : IRQF_SHARED;
-	retval = request_irq(pci_irq_vector(pdev, 0), rtl8169_interrupt,
-			     irqflags, dev->name, tp);
+	retval = request_irq(tp->irq, rtl8169_interrupt, irqflags, dev->name, tp);
 	if (retval < 0)
 		goto err_release_fw_2;

@@ -4785,7 +4785,7 @@ static int rtl_open(struct net_device *dev)
 	return retval;
 
 err_free_irq:
-	free_irq(pci_irq_vector(pdev, 0), tp);
+	free_irq(tp->irq, tp);
 err_release_fw_2:
 	rtl_release_firmware(tp);
 	rtl8169_rx_clear(tp);

@@ -5360,6 +5360,7 @@ static int rtl_init_one(struct pci_dev *pdev, const struct pci_device_id *ent)
 		dev_err(&pdev->dev, "Can't allocate interrupt\n");
 		return rc;
 	}
+	tp->irq = pci_irq_vector(pdev, 0);
 
 	INIT_WORK(&tp->wk.work, rtl_task);

@@ -5435,8 +5436,7 @@ static int rtl_init_one(struct pci_dev *pdev, const struct pci_device_id *ent)
 		return rc;
 
 	netdev_info(dev, "%s, %pM, XID %03x, IRQ %d\n",
-		    rtl_chip_infos[chipset].name, dev->dev_addr, xid,
-		    pci_irq_vector(pdev, 0));
+		    rtl_chip_infos[chipset].name, dev->dev_addr, xid, tp->irq);
 
 	if (jumbo_max)
 		netdev_info(dev, "jumbo features [frames: %d bytes, tx checksumming: %s]\n",

-- 
2.34.1

Re: [PATCH net-next] r8169: don't use pci_irq_vector() in atomic context

From: Heiner Kallweit <hkallweit1@gmail.com>
Date: 2021-12-28 22:11:58

On 28.12.2021 22:02, Heiner Kallweit wrote:

From: Thomas Gleixner <redacted>

Since referenced change pci_irq_vector() can't be used in atomic
context any longer. This conflicts with our usage of this function
in rtl8169_netpoll(). Therefore store the interrupt number in
struct rtl8169_private.

Fixes: 495c66aca3da ("genirq/msi: Convert to new functions")

Seeing the "fail" in patchwork: The referenced commit just recently
showed up in linux-next and isn't in net-next yet.

quoted hunk

Signed-off-by: Thomas Gleixner <redacted>
Signed-off-by: Heiner Kallweit <hkallweit1@gmail.com>
---
 drivers/net/ethernet/realtek/r8169_main.c | 14 +++++++-------
 1 file changed, 7 insertions(+), 7 deletions(-)

diff --git a/drivers/net/ethernet/realtek/r8169_main.c b/drivers/net/ethernet/realtek/r8169_main.c
index 3d6843332..7161a5b1c 100644
--- a/drivers/net/ethernet/realtek/r8169_main.c
+++ b/drivers/net/ethernet/realtek/r8169_main.c

@@ -615,6 +615,7 @@ struct rtl8169_private {
 	struct ring_info tx_skb[NUM_TX_DESC];	/* Tx data buffers */
 	u16 cp_cmd;
 	u32 irq_mask;
+	int irq;
 	struct clk *clk;
 
 	struct {

@@ -4712,7 +4713,7 @@ static int rtl8169_close(struct net_device *dev)
 
 	cancel_work_sync(&tp->wk.work);
 
-	free_irq(pci_irq_vector(pdev, 0), tp);
+	free_irq(tp->irq, tp);
 
 	phy_disconnect(tp->phydev);

@@ -4733,7 +4734,7 @@ static void rtl8169_netpoll(struct net_device *dev)
 {
 	struct rtl8169_private *tp = netdev_priv(dev);
 
-	rtl8169_interrupt(pci_irq_vector(tp->pci_dev, 0), tp);
+	rtl8169_interrupt(tp->irq, tp);
 }
 #endif

@@ -4767,8 +4768,7 @@ static int rtl_open(struct net_device *dev)
 	rtl_request_firmware(tp);
 
 	irqflags = pci_dev_msi_enabled(pdev) ? IRQF_NO_THREAD : IRQF_SHARED;
-	retval = request_irq(pci_irq_vector(pdev, 0), rtl8169_interrupt,
-			     irqflags, dev->name, tp);
+	retval = request_irq(tp->irq, rtl8169_interrupt, irqflags, dev->name, tp);
 	if (retval < 0)
 		goto err_release_fw_2;

@@ -4785,7 +4785,7 @@ static int rtl_open(struct net_device *dev)
 	return retval;
 
 err_free_irq:
-	free_irq(pci_irq_vector(pdev, 0), tp);
+	free_irq(tp->irq, tp);
 err_release_fw_2:
 	rtl_release_firmware(tp);
 	rtl8169_rx_clear(tp);

@@ -5360,6 +5360,7 @@ static int rtl_init_one(struct pci_dev *pdev, const struct pci_device_id *ent)
 		dev_err(&pdev->dev, "Can't allocate interrupt\n");
 		return rc;
 	}
+	tp->irq = pci_irq_vector(pdev, 0);
 
 	INIT_WORK(&tp->wk.work, rtl_task);

@@ -5435,8 +5436,7 @@ static int rtl_init_one(struct pci_dev *pdev, const struct pci_device_id *ent)
 		return rc;
 
 	netdev_info(dev, "%s, %pM, XID %03x, IRQ %d\n",
-		    rtl_chip_infos[chipset].name, dev->dev_addr, xid,
-		    pci_irq_vector(pdev, 0));
+		    rtl_chip_infos[chipset].name, dev->dev_addr, xid, tp->irq);
 
 	if (jumbo_max)
 		netdev_info(dev, "jumbo features [frames: %d bytes, tx checksumming: %s]\n",

Re: [PATCH net-next] r8169: don't use pci_irq_vector() in atomic context

From: Jakub Kicinski <kuba@kernel.org>
Date: 2021-12-28 23:58:48

On Tue, 28 Dec 2021 23:11:47 +0100 Heiner Kallweit wrote:

On 28.12.2021 22:02, Heiner Kallweit wrote:

quoted

From: Thomas Gleixner <redacted>

Since referenced change pci_irq_vector() can't be used in atomic
context any longer. This conflicts with our usage of this function
in rtl8169_netpoll(). Therefore store the interrupt number in
struct rtl8169_private.

Fixes: 495c66aca3da ("genirq/msi: Convert to new functions")

Seeing the "fail" in patchwork: The referenced commit just recently
showed up in linux-next and isn't in net-next yet.

Thanks for the heads up, looks safe to apply.

Re: [PATCH net-next] r8169: don't use pci_irq_vector() in atomic context

From: patchwork-bot+netdevbpf@kernel.org
Date: 2021-12-29 00:20:16

Hello:

This patch was applied to netdev/net-next.git (master)
by Jakub Kicinski [off-list ref]:

On Tue, 28 Dec 2021 22:02:30 +0100 you wrote:

From: Thomas Gleixner <redacted>

Since referenced change pci_irq_vector() can't be used in atomic
context any longer. This conflicts with our usage of this function
in rtl8169_netpoll(). Therefore store the interrupt number in
struct rtl8169_private.

[...]

Here is the summary with links:
  - [net-next] r8169: don't use pci_irq_vector() in atomic context
    https://git.kernel.org/netdev/net-next/c/1bd327718841

You are awesome, thank you!
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