From 20aba4ed2e91e696c998ae8dfbebb370ed66811d Mon Sep 17 00:00:00 2001 From: Patrick Bruenn Date: Mon, 26 Oct 2015 08:28:10 +0100 Subject: [PATCH] fix ccat startup stall. In case the dma memory was allocated above 4 GB limit, CCAT is unable to access it. -> limit the dma_mask to 32-bit to omit this situation --- devices/ccat/module.c | 5 ++--- 1 file changed, 2 insertions(+), 3 deletions(-) diff --git a/devices/ccat/module.c b/devices/ccat/module.c index 78c68e8d..552dc860 100644 --- a/devices/ccat/module.c +++ b/devices/ccat/module.c @@ -288,9 +288,8 @@ static int ccat_pci_probe(struct pci_dev *pdev, const struct pci_device_id *id) goto cleanup_pci_device; } - if (!dma_set_mask_and_coherent(&pdev->dev, DMA_BIT_MASK(64))) { - pr_debug("64 bit DMA supported, pci rev: %u\n", revision); - } else if (!dma_set_mask_and_coherent(&pdev->dev, DMA_BIT_MASK(32))) { + /* CCAT is unable to access memory above 4 GB */ + if (!dma_set_mask_and_coherent(&pdev->dev, DMA_BIT_MASK(32))) { pr_debug("32 bit DMA supported, pci rev: %u\n", revision); } else { pr_warn("No suitable DMA available, pci rev: %u\n", revision);