Re: [PATCH v5 3/4] uio_pci_generic: add MSI/MSI-X support

[Stephen Hemminger]

On Tue,  6 Oct 2015 20:17:38 +0300
Vlad Zolotarov <vladz@xxxxxxxxxxxxxxxxxxxx> wrote:

> +	int i, vectors = pci_msix_vec_count(pdev);
> +
> +	if (vectors <= 0)
> +		return false;
> +

Since devices like fm10k can thousands of MSI vectors, and often systems
have limited number of slots, some resource control is needed.
I limited the number in my version. That was one of the reasons for the late
binding of MSI vectors. Intended to allow application to ask for how
many it wanted.
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