diff options
Diffstat (limited to 'drivers')
| -rw-r--r-- | drivers/block/cciss.c | 23 |
1 files changed, 13 insertions, 10 deletions
diff --git a/drivers/block/cciss.c b/drivers/block/cciss.c index 9a48695..b4264bc 100644 --- a/drivers/block/cciss.c +++ b/drivers/block/cciss.c @@ -4108,6 +4108,18 @@ static inline bool CISS_signature_present(ctlr_info_t *h) return true; } +/* Need to enable prefetch in the SCSI core for 6400 in x86 */ +static inline void cciss_enable_scsi_prefetch(ctlr_info_t *h) +{ +#ifdef CONFIG_X86 + u32 prefetch; + + prefetch = readl(&(h->cfgtable->SCSI_Prefetch)); + prefetch |= 0x100; + writel(prefetch, &(h->cfgtable->SCSI_Prefetch)); +#endif +} + static int __devinit cciss_pci_init(ctlr_info_t *c) { int prod_index, err; @@ -4169,16 +4181,7 @@ static int __devinit cciss_pci_init(ctlr_info_t *c) err = -ENODEV; goto err_out_free_res; } -#ifdef CONFIG_X86 - { - /* Need to enable prefetch in the SCSI core for 6400 in x86 */ - __u32 prefetch; - prefetch = readl(&(c->cfgtable->SCSI_Prefetch)); - prefetch |= 0x100; - writel(prefetch, &(c->cfgtable->SCSI_Prefetch)); - } -#endif - + cciss_enable_scsi_prefetch(c); /* Disabling DMA prefetch and refetch for the P600. * An ASIC bug may result in accesses to invalid memory addresses. * We've disabled prefetch for some time now. Testing with XEN |
