From 46de63e260c3fa3ff2b6810de2ebe7ed9a882995 Mon Sep 17 00:00:00 2001 From: "Sumit.Saxena@lsi.com" Date: Wed, 12 Feb 2014 23:38:44 +0530 Subject: [PATCH] [SCSI] megaraid_sas: Set 32-bit DMA mask If consistent DMA mask is set to 64 bit, fall back to 32bit DMA mask and 32bit consistent DMA mask. 64bit consistent DMA mask may be set on some 64bit DMA slot, which causes DMA offset "10000000000000" and MFI_INIT and IOCTL frames will have high memory addresses, leads to firmware FAULT. Signed-off-by: Kashyap Desai Signed-off-by: Sumit Saxena Signed-off-by: James Bottomley --- drivers/scsi/megaraid/megaraid_sas_base.c | 13 +++++++++++++ 1 file changed, 13 insertions(+) diff --git a/drivers/scsi/megaraid/megaraid_sas_base.c b/drivers/scsi/megaraid/megaraid_sas_base.c index 3cf97a388e4a..db58bbe4f952 100644 --- a/drivers/scsi/megaraid/megaraid_sas_base.c +++ b/drivers/scsi/megaraid/megaraid_sas_base.c @@ -4221,6 +4221,19 @@ megasas_set_dma_mask(struct pci_dev *pdev) if (pci_set_dma_mask(pdev, DMA_BIT_MASK(32)) != 0) goto fail_set_dma_mask; } + /* + * Ensure that all data structures are allocated in 32-bit + * memory. + */ + if (pci_set_consistent_dma_mask(pdev, DMA_BIT_MASK(32)) != 0) { + /* Try 32bit DMA mask and 32 bit Consistent dma mask */ + if (!pci_set_dma_mask(pdev, DMA_BIT_MASK(32)) + && !pci_set_consistent_dma_mask(pdev, DMA_BIT_MASK(32))) + dev_info(&pdev->dev, "set 32bit DMA mask" + "and 32 bit consistent mask\n"); + else + goto fail_set_dma_mask; + } return 0; -- 2.34.1