The change to use dma_set_mask_and_coherent() incorrectly made a second call with the 32 bit DMA mask value when the call with the 64 bit DMA mask value succeeded. This resulted in FC connections failing due to corrupted data buffers, and various other SCSI/FCP I/O errors.

Fixes: a69b080025ea ("scsi: bfa: use dma_set_mask_and_coherent") Cc: stable@vger.kernel.org Suggested-by: Ewan D. Milne emilne@redhat.com Signed-off-by: Hannes Reinecke hare@suse.com --- drivers/scsi/bfa/bfad.c | 18 +++++++++++++----- 1 file changed, 13 insertions(+), 5 deletions(-)

diff --git a/drivers/scsi/bfa/bfad.c b/drivers/scsi/bfa/bfad.c index 42a0caf6740d..88880a66a189 100644 --- a/drivers/scsi/bfa/bfad.c +++ b/drivers/scsi/bfa/bfad.c @@ -727,7 +727,7 @@ bfad_init_timer(struct bfad_s *bfad) int bfad_pci_init(struct pci_dev *pdev, struct bfad_s *bfad) { - int rc = -ENODEV; + int rc = -ENODEV;

if (pci_enable_device(pdev)) { printk(KERN_ERR "pci_enable_device fail %p\n", pdev); @@ -739,8 +739,12 @@ bfad_pci_init(struct pci_dev *pdev, struct bfad_s *bfad)

pci_set_master(pdev);

- if (dma_set_mask_and_coherent(&pdev->dev, DMA_BIT_MASK(64)) || - dma_set_mask_and_coherent(&pdev->dev, DMA_BIT_MASK(32))) { + rc = dma_set_mask_and_coherent(&pdev->dev, DMA_BIT_MASK(64)); + if (rc) + rc = dma_set_mask_and_coherent(&pdev->dev, DMA_BIT_MASK(32)); + + if (rc) { + rc = -ENODEV; printk(KERN_ERR "dma_set_mask_and_coherent fail %p\n", pdev); goto out_release_region; } @@ -1534,6 +1538,7 @@ bfad_pci_slot_reset(struct pci_dev *pdev) { struct bfad_s *bfad = pci_get_drvdata(pdev); u8 byte; + int rc;

dev_printk(KERN_ERR, &pdev->dev, "bfad_pci_slot_reset flags: 0x%x\n", bfad->bfad_flags); @@ -1561,8 +1566,11 @@ bfad_pci_slot_reset(struct pci_dev *pdev) pci_save_state(pdev); pci_set_master(pdev);

- if (dma_set_mask_and_coherent(&bfad->pcidev->dev, DMA_BIT_MASK(64)) || - dma_set_mask_and_coherent(&bfad->pcidev->dev, DMA_BIT_MASK(32))) + rc = dma_set_mask_and_coherent(&bfad->pcidev->dev, DMA_BIT_MASK(64)); + if (rc) + rc = dma_set_mask_and_coherent(&bfad->pcidev->dev, + DMA_BIT_MASK(32)); + if (rc) goto out_disable_device;

if (restart_bfa(bfad) == -1)