scsi: mpt3sas: re-do lost mpt3sas DMA mask fix

This is a re-do of commit e0e0747 ("scsi: mpt3sas: Fix return value
check of dma_get_required_mask()"), which I ended up undoing in a
mis-merge in commit 62e6e59 ("Merge tag 'scsi-misc' of
git://git.kernel.org/pub/scm/linux/kernel/git/jejb/scsi").

The original commit message was

  scsi: mpt3sas: Fix return value check of dma_get_required_mask()

  Fix the incorrect return value check of dma_get_required_mask().  Due to
  this incorrect check, the driver was always setting the DMA mask to 63 bit.

  Link: https://lore.kernel.org/r/[email protected]
  Fixes: ba27c5c ("scsi: mpt3sas: Don't change the DMA coherent mask after allocations")
  Signed-off-by: Sreekanth Reddy <[email protected]>
  Signed-off-by: Martin K. Petersen <[email protected]>

and this fix was lost when I mis-merged the conflict with commit
9df6509 ("scsi: mpt3sas: Don't change DMA mask while reallocating
pools").

Reported-by: Juergen Gross <[email protected]>
Fixes: 62e6e59 ("Merge tag 'scsi-misc' of git://git.kernel.org/pub/scm/linux/kernel/git/jejb/scsi")
Link: https://lore.kernel.org/all/CAHk-=wjaK-TxrNaGtFDpL9qNHL1MVkWXO1TT6vObD5tXMSC4Zg@mail.gmail.com
Signed-off-by: Linus Torvalds <[email protected]>

Author: sreekanthbrcm

drivers/scsi/mpt3sas/mpt3sas_base.c

@@ -2993,7 +2993,7 @@ _base_config_dma_addressing(struct MPT3SAS_ADAPTER *ioc, struct pci_dev *pdev)
 	u64 coherent_dma_mask, dma_mask;
 
 	if (ioc->is_mcpu_endpoint || sizeof(dma_addr_t) == 4 ||
-	    dma_get_required_mask(&pdev->dev) <= 32) {
+	    dma_get_required_mask(&pdev->dev) <= DMA_BIT_MASK(32)) {
 		ioc->dma_mask = 32;
 		coherent_dma_mask = dma_mask = DMA_BIT_MASK(32);
 	/* Set 63 bit DMA mask for all SAS3 and SAS35 controllers */