3.16.65-rc1 review patch. If anyone has any objections, please let me know.
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From: Shivasharan S shivasharan.srikanteshwara@broadcom.com
commit 894169db12463cea08d0e2a9e35f42b291340e5a upstream.
Although MegaRAID controllers support 64-bit DMA addressing, as per hardware design, DMA address with all 64-bits set (0xFFFFFFFF-FFFFFFFF) results in a firmware fault.
Driver will set 63-bit DMA mask to ensure the above address will not be used.
Signed-off-by: Shivasharan S shivasharan.srikanteshwara@broadcom.com Signed-off-by: Martin K. Petersen martin.petersen@oracle.com [bwh: Backported to 3.16: Only one instance of a 64-bit mask needs changing] Signed-off-by: Ben Hutchings ben@decadent.org.uk --- --- a/drivers/scsi/megaraid/megaraid_sas_base.c +++ b/drivers/scsi/megaraid/megaraid_sas_base.c @@ -4592,7 +4592,7 @@ megasas_set_dma_mask(struct pci_dev *pde * All our contollers are capable of performing 64-bit DMA */ if (IS_DMA64) { - if (pci_set_dma_mask(pdev, DMA_BIT_MASK(64)) != 0) { + if (pci_set_dma_mask(pdev, DMA_BIT_MASK(63)) != 0) {
if (pci_set_dma_mask(pdev, DMA_BIT_MASK(32)) != 0) goto fail_set_dma_mask;