From: c00284940 c00284940@huawei.com

plinth inclusion category: bugfix bugzilla: NA DTS: DTS2019030103192 CVE: NA

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: e4db40e ("scsi: hisi_sas: use dma_set_mask_and_coherent") Cc: stable@vger.kernel.org

Signed-off-by: c00284940 c00284940@huawei.com Reviewed-on: http://10.90.31.173:8080/4799 Tested-by: public TuringEE turingee@huawei.com Reviewed-by: huangdaode 00314581 huangdaode@hisilicon.com Reviewed-by: public TuringEE turingee@huawei.com --- drivers/scsi/hisi_sas/hisi_sas_main.c | 8 ++++++-- drivers/scsi/hisi_sas/hisi_sas_v3_hw.c | 15 +++++++-------- 2 files changed, 13 insertions(+), 10 deletions(-)

diff --git a/drivers/scsi/hisi_sas/hisi_sas_main.c b/drivers/scsi/hisi_sas/hisi_sas_main.c index 30db81d..8e9d980 100644 --- a/drivers/scsi/hisi_sas/hisi_sas_main.c +++ b/drivers/scsi/hisi_sas/hisi_sas_main.c @@ -2567,6 +2567,7 @@ static struct Scsi_Host *hisi_sas_shost_alloc(struct platform_device *pdev, struct Scsi_Host *shost; struct hisi_hba *hisi_hba; struct device *dev = &pdev->dev; + int error;

shost = scsi_host_alloc(hw->sht, sizeof(*hisi_hba)); if (!shost) { @@ -2587,8 +2588,11 @@ static struct Scsi_Host *hisi_sas_shost_alloc(struct platform_device *pdev, if (hisi_sas_get_fw_info(hisi_hba) < 0) goto err_out;

- if (dma_set_mask_and_coherent(dev, DMA_BIT_MASK(64)) && - dma_set_mask_and_coherent(dev, DMA_BIT_MASK(32))) { + error = dma_set_mask_and_coherent(dev, DMA_BIT_MASK(64)); + if (error) + error = dma_set_mask_and_coherent(dev, DMA_BIT_MASK(32)); + + if (error) { dev_err(dev, "No usable DMA addressing method\n"); goto err_out; } diff --git a/drivers/scsi/hisi_sas/hisi_sas_v3_hw.c b/drivers/scsi/hisi_sas/hisi_sas_v3_hw.c index b4bde32..24db55f 100644 --- a/drivers/scsi/hisi_sas/hisi_sas_v3_hw.c +++ b/drivers/scsi/hisi_sas/hisi_sas_v3_hw.c @@ -2903,14 +2903,13 @@ hisi_sas_v3_probe(struct pci_dev *pdev, const struct pci_device_id *id) if (rc) goto err_out_disable_device;

- if ((pci_set_dma_mask(pdev, DMA_BIT_MASK(64)) != 0) || - (pci_set_consistent_dma_mask(pdev, DMA_BIT_MASK(64)) != 0)) { - if ((pci_set_dma_mask(pdev, DMA_BIT_MASK(32)) != 0) || - (pci_set_consistent_dma_mask(pdev, DMA_BIT_MASK(32)) != 0)) { - dev_err(dev, "No usable DMA addressing method\n"); - rc = -EIO; - goto err_out_regions; - } + 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) { + dev_err(dev, "No usable DMA addressing method\n"); + rc = -ENODEV; + goto err_out_regions; }

shost = hisi_sas_shost_alloc_pci(pdev);