[SCSI] hpsa: factor out hpsa_p600_dma_prefetch_quirk

Signed-off-by: Stephen M. Cameron <scameron@beardog.cce.hp.com>
Signed-off-by: James Bottomley <James.Bottomley@suse.de>

1 files changed, 15 insertions, 11 deletions

diff --git a/drivers/scsi/hpsa.c b/drivers/scsi/hpsa.c
index 62f9784ecf8f..9e81e0bcf1e2 100644
--- a/drivers/scsi/hpsa.c
+++ b/drivers/scsi/hpsa.c
@@ -3396,6 +3396,20 @@ static inline void hpsa_enable_scsi_prefetch(struct ctlr_info *h)
 #endif
 }
 
+/* Disable DMA prefetch for the P600.  Otherwise an ASIC bug may result
+ * in a prefetch beyond physical memory.
+ */
+static inline void hpsa_p600_dma_prefetch_quirk(struct ctlr_info *h)
+{
+        u32 dma_prefetch;
+
+        if (h->board_id != 0x3225103C)
+                return;
+        dma_prefetch = readl(h->vaddr + I2O_DMA1_CFG);
+        dma_prefetch |= 0x8000;
+        writel(dma_prefetch, h->vaddr + I2O_DMA1_CFG);
+}
+
 static int __devinit hpsa_pci_init(struct ctlr_info *h)
 {
         int i, prod_index, err;
@@ -3444,17 +3458,7 @@ static int __devinit hpsa_pci_init(struct ctlr_info *h)
                 goto err_out_free_res;
         }
         hpsa_enable_scsi_prefetch(h);
-
-        /* Disabling DMA prefetch for the P600
-         * An ASIC bug may result in a prefetch beyond
-         * physical memory.
-         */
-        if (h->board_id == 0x3225103C) {
-                u32 dma_prefetch;
-                dma_prefetch = readl(h->vaddr + I2O_DMA1_CFG);
-                dma_prefetch |= 0x8000;
-                writel(dma_prefetch, h->vaddr + I2O_DMA1_CFG);
-        }
+        hpsa_p600_dma_prefetch_quirk(h);
 
         h->max_commands = readl(&(h->cfgtable->CmdsOutMax));
         /* Update the field, and then ring the doorbell */