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Subject[PATCH 4.20 82/88] scsi: 3w-sas: fix calls to dma_set_mask_and_coherent()
Date
4.20-stable review patch.  If anyone has any objections, please let me know.

------------------

From: Hannes Reinecke <hare@suse.de>

commit 1feb3b02294994ee3a067c9b6cda6c244fd0ee18 upstream.

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.

Fixes: b1fa122930c4 ("scsi: 3w-sas: fully convert to the generic DMA API")
Cc: <stable@vger.kernel.org>
Signed-off-by: Hannes Reinecke <hare@suse.com>
Reviewed-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: Ewan D. Milne <emilne@redhat.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

---
drivers/scsi/3w-sas.c | 12 ++++++++----
1 file changed, 8 insertions(+), 4 deletions(-)

--- a/drivers/scsi/3w-sas.c
+++ b/drivers/scsi/3w-sas.c
@@ -1573,8 +1573,10 @@ static int twl_probe(struct pci_dev *pde
pci_set_master(pdev);
pci_try_set_mwi(pdev);

- if (dma_set_mask_and_coherent(&pdev->dev, DMA_BIT_MASK(64)) ||
- dma_set_mask_and_coherent(&pdev->dev, DMA_BIT_MASK(32))) {
+ retval = dma_set_mask_and_coherent(&pdev->dev, DMA_BIT_MASK(64));
+ if (retval)
+ retval = dma_set_mask_and_coherent(&pdev->dev, DMA_BIT_MASK(32));
+ if (retval) {
TW_PRINTK(host, TW_DRIVER, 0x18, "Failed to set dma mask");
retval = -ENODEV;
goto out_disable_device;
@@ -1805,8 +1807,10 @@ static int twl_resume(struct pci_dev *pd
pci_set_master(pdev);
pci_try_set_mwi(pdev);

- if (dma_set_mask_and_coherent(&pdev->dev, DMA_BIT_MASK(64)) ||
- dma_set_mask_and_coherent(&pdev->dev, DMA_BIT_MASK(32))) {
+ retval = dma_set_mask_and_coherent(&pdev->dev, DMA_BIT_MASK(64));
+ if (retval)
+ retval = dma_set_mask_and_coherent(&pdev->dev, DMA_BIT_MASK(32));
+ if (retval) {
TW_PRINTK(host, TW_DRIVER, 0x25, "Failed to set dma mask during resume");
retval = -ENODEV;
goto out_disable_device;

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