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ethercat
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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
This commit is contained in:
Patrick Bruenn 2015-10-26 08:28:10 +01:00 committed by Florian Pose
parent ec5c35306e
commit 20aba4ed2e
1 changed files with 2 additions and 3 deletions
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5
devices/ccat/module.c
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@ -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);