diff mbox series

[V2,03/36] PCI/MSI: Allocate MSI device data on first use

Message ID 20211206210437.821900680@linutronix.de (mailing list archive)
State Superseded
Delegated to: Bjorn Helgaas
Headers show
Series genirq/msi, PCI/MSI: Spring cleaning - Part 2 | expand

Commit Message

Thomas Gleixner Dec. 6, 2021, 10:39 p.m. UTC 
Allocate MSI device data on first use, i.e. when a PCI driver invokes one
of the PCI/MSI enablement functions.

Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Reviewed-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Reviewed-by: Jason Gunthorpe <jgg@nvidia.com>
---
 drivers/pci/msi/msi.c |   20 +++++++++++++++-----
 1 file changed, 15 insertions(+), 5 deletions(-)

Comments

Bjorn Helgaas Dec. 7, 2021, 9:03 p.m. UTC | #1 
On Mon, Dec 06, 2021 at 11:39:00PM +0100, Thomas Gleixner wrote:
> Allocate MSI device data on first use, i.e. when a PCI driver invokes one
> of the PCI/MSI enablement functions.
> 
> Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
> Reviewed-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
> Reviewed-by: Jason Gunthorpe <jgg@nvidia.com>

Acked-by: Bjorn Helgaas <bhelgaas@google.com>

> ---
>  drivers/pci/msi/msi.c |   20 +++++++++++++++-----
>  1 file changed, 15 insertions(+), 5 deletions(-)
> 
> --- a/drivers/pci/msi/msi.c
> +++ b/drivers/pci/msi/msi.c
> @@ -889,10 +889,12 @@ static int __pci_enable_msi_range(struct
>  /* deprecated, don't use */
>  int pci_enable_msi(struct pci_dev *dev)
>  {
> -	int rc = __pci_enable_msi_range(dev, 1, 1, NULL);
> -	if (rc < 0)
> -		return rc;
> -	return 0;
> +	int rc = msi_setup_device_data(&dev->dev);
> +
> +	if (!rc)
> +		rc = __pci_enable_msi_range(dev, 1, 1, NULL);
> +
> +	return rc < 0 ? rc : 0;
>  }
>  EXPORT_SYMBOL(pci_enable_msi);
>  
> @@ -947,7 +949,11 @@ static int __pci_enable_msix_range(struc
>  int pci_enable_msix_range(struct pci_dev *dev, struct msix_entry *entries,
>  		int minvec, int maxvec)
>  {
> -	return __pci_enable_msix_range(dev, entries, minvec, maxvec, NULL, 0);
> +	int ret = msi_setup_device_data(&dev->dev);
> +
> +	if (!ret)
> +		ret = __pci_enable_msix_range(dev, entries, minvec, maxvec, NULL, 0);
> +	return ret;
>  }
>  EXPORT_SYMBOL(pci_enable_msix_range);
>  
> @@ -974,8 +980,12 @@ int pci_alloc_irq_vectors_affinity(struc
>  				   struct irq_affinity *affd)
>  {
>  	struct irq_affinity msi_default_affd = {0};
> +	int ret = msi_setup_device_data(&dev->dev);
>  	int nvecs = -ENOSPC;
>  
> +	if (ret)
> +		return ret;
> +
>  	if (flags & PCI_IRQ_AFFINITY) {
>  		if (!affd)
>  			affd = &msi_default_affd;
>
diff mbox series

Patch

--- a/drivers/pci/msi/msi.c
+++ b/drivers/pci/msi/msi.c
@@ -889,10 +889,12 @@  static int __pci_enable_msi_range(struct
 /* deprecated, don't use */
 int pci_enable_msi(struct pci_dev *dev)
 {
-	int rc = __pci_enable_msi_range(dev, 1, 1, NULL);
-	if (rc < 0)
-		return rc;
-	return 0;
+	int rc = msi_setup_device_data(&dev->dev);
+
+	if (!rc)
+		rc = __pci_enable_msi_range(dev, 1, 1, NULL);
+
+	return rc < 0 ? rc : 0;
 }
 EXPORT_SYMBOL(pci_enable_msi);
 
@@ -947,7 +949,11 @@  static int __pci_enable_msix_range(struc
 int pci_enable_msix_range(struct pci_dev *dev, struct msix_entry *entries,
 		int minvec, int maxvec)
 {
-	return __pci_enable_msix_range(dev, entries, minvec, maxvec, NULL, 0);
+	int ret = msi_setup_device_data(&dev->dev);
+
+	if (!ret)
+		ret = __pci_enable_msix_range(dev, entries, minvec, maxvec, NULL, 0);
+	return ret;
 }
 EXPORT_SYMBOL(pci_enable_msix_range);
 
@@ -974,8 +980,12 @@  int pci_alloc_irq_vectors_affinity(struc
 				   struct irq_affinity *affd)
 {
 	struct irq_affinity msi_default_affd = {0};
+	int ret = msi_setup_device_data(&dev->dev);
 	int nvecs = -ENOSPC;
 
+	if (ret)
+		return ret;
+
 	if (flags & PCI_IRQ_AFFINITY) {
 		if (!affd)
 			affd = &msi_default_affd;