From 4c5d9619e06b960d14f5640341f40e71f78801c2 Mon Sep 17 00:00:00 2001 From: Dan Williams Date: Wed, 13 Nov 2013 16:29:52 -0800 Subject: ioat: kill msix_single_vector support Once we have determined that we will not have all of our desired msix vectors there is no point in attempting a single msix allocation. The driver will already need to read registers to determine the source of the interrupt the fact that it is msix is moot. Fallback directly to msi. Reported-by: Alexander Gordeev Cc: Dave Jiang Signed-off-by: Dan Williams --- drivers/dma/ioat/dma.c | 27 +++------------------------ drivers/dma/ioat/dma.h | 1 - drivers/dma/ioat/dma_v3.c | 7 ------- 3 files changed, 3 insertions(+), 32 deletions(-) (limited to 'drivers/dma/ioat') diff --git a/drivers/dma/ioat/dma.c b/drivers/dma/ioat/dma.c index 6fcf741ad91b..fb879d9f026f 100644 --- a/drivers/dma/ioat/dma.c +++ b/drivers/dma/ioat/dma.c @@ -869,8 +869,7 @@ static char ioat_interrupt_style[32] = "msix"; module_param_string(ioat_interrupt_style, ioat_interrupt_style, sizeof(ioat_interrupt_style), 0644); MODULE_PARM_DESC(ioat_interrupt_style, - "set ioat interrupt style: msix (default), " - "msix-single-vector, msi, intx)"); + "set ioat interrupt style: msix (default), msi, intx"); /** * ioat_dma_setup_interrupts - setup interrupt handler @@ -888,8 +887,6 @@ int ioat_dma_setup_interrupts(struct ioatdma_device *device) if (!strcmp(ioat_interrupt_style, "msix")) goto msix; - if (!strcmp(ioat_interrupt_style, "msix-single-vector")) - goto msix_single_vector; if (!strcmp(ioat_interrupt_style, "msi")) goto msi; if (!strcmp(ioat_interrupt_style, "intx")) @@ -904,10 +901,8 @@ msix: device->msix_entries[i].entry = i; err = pci_enable_msix(pdev, device->msix_entries, msixcnt); - if (err < 0) + if (err) goto msi; - if (err > 0) - goto msix_single_vector; for (i = 0; i < msixcnt; i++) { msix = &device->msix_entries[i]; @@ -921,29 +916,13 @@ msix: chan = ioat_chan_by_index(device, j); devm_free_irq(dev, msix->vector, chan); } - goto msix_single_vector; + goto msi; } } intrctrl |= IOAT_INTRCTRL_MSIX_VECTOR_CONTROL; device->irq_mode = IOAT_MSIX; goto done; -msix_single_vector: - msix = &device->msix_entries[0]; - msix->entry = 0; - err = pci_enable_msix(pdev, device->msix_entries, 1); - if (err) - goto msi; - - err = devm_request_irq(dev, msix->vector, ioat_dma_do_interrupt, 0, - "ioat-msix", device); - if (err) { - pci_disable_msix(pdev); - goto msi; - } - device->irq_mode = IOAT_MSIX_SINGLE; - goto done; - msi: err = pci_enable_msi(pdev); if (err) diff --git a/drivers/dma/ioat/dma.h b/drivers/dma/ioat/dma.h index df552d841481..11fb877ddca9 100644 --- a/drivers/dma/ioat/dma.h +++ b/drivers/dma/ioat/dma.h @@ -52,7 +52,6 @@ enum ioat_irq_mode { IOAT_NOIRQ = 0, IOAT_MSIX, - IOAT_MSIX_SINGLE, IOAT_MSI, IOAT_INTX }; diff --git a/drivers/dma/ioat/dma_v3.c b/drivers/dma/ioat/dma_v3.c index f8170de1d6a4..38616634780f 100644 --- a/drivers/dma/ioat/dma_v3.c +++ b/drivers/dma/ioat/dma_v3.c @@ -1468,13 +1468,6 @@ static int ioat3_irq_reinit(struct ioatdma_device *device) pci_disable_msix(pdev); break; - case IOAT_MSIX_SINGLE: - msix = &device->msix_entries[0]; - chan = ioat_chan_by_index(device, 0); - devm_free_irq(&pdev->dev, msix->vector, chan); - pci_disable_msix(pdev); - break; - case IOAT_MSI: chan = ioat_chan_by_index(device, 0); devm_free_irq(&pdev->dev, pdev->irq, chan); -- cgit v1.2.3