On Tue, Jun 2, 2020 at 12:58 PM Stankiewicz, Piotr piotr.stankiewicz@intel.com wrote:
-----Original Message----- From: Andy Shevchenko andy.shevchenko@gmail.com Sent: Tuesday, June 2, 2020 11:49 AM To: Stankiewicz, Piotr piotr.stankiewicz@intel.com Cc: Alex Deucher alexander.deucher@amd.com; Christian König christian.koenig@amd.com; David Zhou David1.Zhou@amd.com; David Airlie airlied@linux.ie; Daniel Vetter daniel@ffwll.ch; amd- gfx@lists.freedesktop.org; dri-devel dri-devel@lists.freedesktop.org; Linux Kernel Mailing List linux-kernel@vger.kernel.org Subject: Re: [PATCH 07/15] drm/amdgpu: use PCI_IRQ_MSI_TYPES where appropriate On Tue, Jun 2, 2020 at 12:24 PM Piotr Stankiewicz piotr.stankiewicz@intel.com wrote:
...
int nvec = pci_msix_vec_count(adev->pdev); unsigned int flags;
if (nvec <= 0) {
if (nvec > 0)flags = PCI_IRQ_MSI_TYPES;else flags = PCI_IRQ_MSI;
} else {flags = PCI_IRQ_MSI | PCI_IRQ_MSIX;}
/* we only need one vector */ nvec = pci_alloc_irq_vectors(adev->pdev, 1, 1, flags);I'm not sure if you have seen my last comment internally about this patch.
I don't understand why we need these pci_msix_vec_count() followed by conditional at all. Perhaps we may simple drop all these and supply flag directly?
But OTOH, I don't know the initial motivation, so, the above patch is non-intrusive and keeps original logic.
Sorry, I must have misunderstood or missed that comment. I am happy to do a V2 if dropping the conditional is preferable.
Let's wait for AMD people to confirm either.