Hi Omer,
On 09/26/2018 09:29 AM, Omer Dagan wrote:
> Hi Hauke
> I removed the Makefile dependency - you are correct there was no need
> for that
> the whitespace issue was not intentional - corrected in this patch
You should use whitespace to do some indention. I do not know if you
missed then or if your mail program removed them. I would suggest to
send the patches with "git send-email".
It also looks like your mail is blocked by the mailling list, probably
because it uses html mail.
Hauke
>
> from: Omer Dagan <omer.dagan@xxxxxxxxxxx>
> Date: Sun, 16 Sep 2018 17:25:11 +0300
> Subject: [PATCH] add support for pci_alloc_irq_vectors
>
> add support for function in kernels under 4.8
> function is a wrapper around 'pci_enable_msi_block' or
> 'pci_enable_msi_range' depending on the kernel version
> the min\max number of interrupts was overridden to always use the
> max number of interrupts which seems correct since it was not
> supported in the old APIs
>
> Signed-off-by: Omer Dagan <omer.dagan@xxxxxxxxxxx>
> ---
> backport/backport-include/linux/pci.h | 19 +++++++++++++++++++
> backport/compat/backport-4.8.c | 25 +++++++++++++++++++++++++
> 2 files changed, 44 insertions(+)
>
> diff --git a/backport/backport-include/linux/pci.h
> b/backport/backport-include/linux/pci.h
> index 67ac40fc..531f5a47 100644
> --- a/backport/backport-include/linux/pci.h
> +++ b/backport/backport-include/linux/pci.h
> @@ -134,6 +134,25 @@ static inline int pci_vfs_assigned(struct pci_dev *dev)
>
> #endif /* LINUX_VERSION_IS_LESS(3,10,0) */
>
> +#if LINUX_VERSION_IS_LESS(4,8,0)
> +#define pci_alloc_irq_vectors LINUX_BACKPORT(pci_alloc_irq_vectors)
> +#ifdef CONFIG_PCI_MSI
> +int pci_alloc_irq_vectors(struct pci_dev *dev, unsigned int min_vecs,
> +unsigned int max_vecs, unsigned int flags);
> +#else
> +static inline int pci_alloc_irq_vectors(struct pci_dev *dev, unsigned
> int min_vecs,
> +unsigned int max_vecs, unsigned int flags)
> +{ return -ENOSYS; }
> +#endif
> +#endif
> +
> +#if LINUX_VERSION_IS_LESS(4,8,0)
> +#define pci_free_irq_vectors LINUX_BACKPORT(pci_free_irq_vectors)
> +static inline void pci_free_irq_vectors(struct pci_dev *dev)
> +{
> +}
> +#endif
> +
> #if LINUX_VERSION_IS_LESS(3,14,0)
> #define pci_enable_msi_range LINUX_BACKPORT(pci_enable_msi_range)
> #ifdef CONFIG_PCI_MSI
> diff --git a/backport/compat/backport-4.8.c b/backport/compat/backport-4.8.c
> index 7d056444..706bd067 100644
> --- a/backport/compat/backport-4.8.c
> +++ b/backport/compat/backport-4.8.c
> @@ -9,6 +9,7 @@
> */
> #include <linux/usb.h>
> #include <linux/usb/cdc.h>
> +#include <linux/pci.h>
>
> int cdc_parse_cdc_header(struct usb_cdc_parsed_header *hdr,
> struct usb_interface *intf,
> @@ -144,3 +145,27 @@ next_desc:
> return cnt;
> }
> EXPORT_SYMBOL_GPL(cdc_parse_cdc_header);
> +
> +#if LINUX_VERSION_IS_LESS(4,8,0)
> +int pci_alloc_irq_vectors(struct pci_dev *dev, unsigned int min_vecs,
> +unsigned int max_vecs, unsigned int flags)
> +{
> +int res;
> +int msi_nvect = max_vecs;
> +
> +if (max_vecs < min_vecs)
> +return -ERANGE;
> +
> +#if LINUX_VERSION_IS_LESS(3,15,0)
> +res = pci_enable_msi_block(dev, msi_nvect);
> +if (res == 0) {
> +return msi_nvect;
> +}
> +#else
> +res = pci_enable_msi_range(dev, msi_nvect, msi_nvect);
> +return msi_nvect;
> +#endif /*LINUX_VERSION_IS_LESS(3,15,0)*/
> +return -ENOSPC;
> +}
> +EXPORT_SYMBOL(pci_alloc_irq_vectors);
> +#endif /*LINUX_VERSION_IS_LESS(4,8,0)*/
> --
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