scsi: mpi3mr: Fix config page DMA memory leak

A fix for:

DMA-API: pci 0000:83:00.0: device driver has pending DMA allocations while released from device [count=1]

Fixes: 32d457d ("scsi: mpi3mr: Add framework to issue config requests")
Signed-off-by: Tomas Henzl <[email protected]>
Link: https://lore.kernel.org/r/[email protected]
Acked-by: Sathya Prakash Veerichetty <[email protected]>
Signed-off-by: Martin K. Petersen <[email protected]>

Author: thenzl

drivers/scsi/mpi3mr/mpi3mr_fw.c

@@ -4382,7 +4382,11 @@ void mpi3mr_free_mem(struct mpi3mr_ioc *mrioc)
 		    mrioc->admin_req_base, mrioc->admin_req_dma);
 		mrioc->admin_req_base = NULL;
 	}
-
+	if (mrioc->cfg_page) {
+		dma_free_coherent(&mrioc->pdev->dev, mrioc->cfg_page_sz,
+		    mrioc->cfg_page, mrioc->cfg_page_dma);
+		mrioc->cfg_page = NULL;
+	}
 	if (mrioc->pel_seqnum_virt) {
 		dma_free_coherent(&mrioc->pdev->dev, mrioc->pel_seqnum_sz,
 		    mrioc->pel_seqnum_virt, mrioc->pel_seqnum_dma);