ufs: fix DMA mask setting

If the controller doesn't support 64-bit addressing mode, it must not
set the DMA mask to 64-bit.  But it's unconditionally trying to set to
64-bit without checking 64-bit addressing support in the controller
capabilities.

It was correctly checked before commit 3b1d0580
("[SCSI] ufs: Segregate PCI Specific Code"), this aims to restores
the correct behaviour.

To achieve this in a generic way, firstly we should push down the DMA
mask setting routine ufshcd_set_dma_mask() from PCI glue driver to core
driver in order to do it for both PCI glue driver and Platform glue
driver.  Secondly, we should change pci_ DMA mapping API to dma_ DMA
mapping API because core driver is independent of glue drivers.
Signed-off-by: Akinobu Mita <mita@fixstars.com>
Acked-by: Santosh Y <santoshsy@gmail.com>
Signed-off-by: Christoph Hellwig <hch@lst.de>

drivers/scsi/ufs/ufshcd-pci.c

@@ -134,26 +134,6 @@ static void ufshcd_pci_remove(struct pci_dev *pdev)
 	ufshcd_remove(hba);
 }
 
-/**
- * ufshcd_set_dma_mask - Set dma mask based on the controller
- *			 addressing capability
- * @pdev: PCI device structure
- *
- * Returns 0 for success, non-zero for failure
- */
-static int ufshcd_set_dma_mask(struct pci_dev *pdev)
-{
-	int err;
-
-	if (!pci_set_dma_mask(pdev, DMA_BIT_MASK(64))
-		&& !pci_set_consistent_dma_mask(pdev, DMA_BIT_MASK(64)))
-		return 0;
-	err = pci_set_dma_mask(pdev, DMA_BIT_MASK(32));
-	if (!err)
-		err = pci_set_consistent_dma_mask(pdev, DMA_BIT_MASK(32));
-	return err;
-}
-
 /**
  * ufshcd_pci_probe - probe routine of the driver
  * @pdev: pointer to PCI device handle
@@ -184,12 +164,6 @@ ufshcd_pci_probe(struct pci_dev *pdev, const struct pci_device_id *id)
 
 	mmio_base = pcim_iomap_table(pdev)[0];
 
-	err = ufshcd_set_dma_mask(pdev);
-	if (err) {
-		dev_err(&pdev->dev, "set dma mask failed\n");
-		return err;
-	}
-
 	err = ufshcd_init(&pdev->dev, &hba, mmio_base, pdev->irq);
 	if (err) {
 		dev_err(&pdev->dev, "Initialization failed\n");

drivers/scsi/ufs/ufshcd.c

@@ -3258,6 +3258,22 @@ void ufshcd_remove(struct ufs_hba *hba)
 }
 EXPORT_SYMBOL_GPL(ufshcd_remove);
 
+/**
+ * ufshcd_set_dma_mask - Set dma mask based on the controller
+ *			 addressing capability
+ * @hba: per adapter instance
+ *
+ * Returns 0 for success, non-zero for failure
+ */
+static int ufshcd_set_dma_mask(struct ufs_hba *hba)
+{
+	if (hba->capabilities & MASK_64_ADDRESSING_SUPPORT) {
+		if (!dma_set_mask_and_coherent(hba->dev, DMA_BIT_MASK(64)))
+			return 0;
+	}
+	return dma_set_mask_and_coherent(hba->dev, DMA_BIT_MASK(32));
+}
+
 /**
  * ufshcd_init - Driver initialization routine
  * @dev: pointer to device handle
@@ -3309,6 +3325,12 @@ int ufshcd_init(struct device *dev, struct ufs_hba **hba_handle,
 	/* Get Interrupt bit mask per version */
 	hba->intr_mask = ufshcd_get_intr_mask(hba);
 
+	err = ufshcd_set_dma_mask(hba);
+	if (err) {
+		dev_err(hba->dev, "set dma mask failed\n");
+		goto out_disable;
+	}
+
 	/* Allocate memory for host memory space */
 	err = ufshcd_memory_alloc(hba);
 	if (err) {