[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>
diff --git a/drivers/scsi/hpsa.c b/drivers/scsi/hpsa.c
index 62f9784..9e81e0b 100644
--- a/drivers/scsi/hpsa.c
+++ b/drivers/scsi/hpsa.c
@@ -3396,6 +3396,20 @@
#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 @@
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 */