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[SCSI] hpsa: factor out hpsa_enable_scsi_prefetch

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Signed-off-by: Stephen M. Cameron <scameron@beardog.cce.hp.com>
Signed-off-by: James Bottomley <James.Bottomley@suse.de>
This commit is contained in:
Stephen M. Cameron 2010-05-27 15:13:38 -05:00 committed by James Bottomley
parent 76c46e4970
commit f7c391015a
1 changed files with 13 additions and 9 deletions
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22
drivers/scsi/hpsa.c
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@ -3384,6 +3384,18 @@ static inline bool hpsa_CISS_signature_present(struct ctlr_info *h)
return true;
}
/* Need to enable prefetch in the SCSI core for 6400 in x86 */
static inline void hpsa_enable_scsi_prefetch(struct ctlr_info *h)
{
#ifdef CONFIG_X86
u32 prefetch;
prefetch = readl(&(h->cfgtable->SCSI_Prefetch));
prefetch |= 0x100;
writel(prefetch, &(h->cfgtable->SCSI_Prefetch));
#endif
}
static int __devinit hpsa_pci_init(struct ctlr_info *h)
{
int i, prod_index, err;
@ -3431,15 +3443,7 @@ static int __devinit hpsa_pci_init(struct ctlr_info *h)
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(&(h->cfgtable->SCSI_Prefetch));
prefetch |= 0x100;
writel(prefetch, &(h->cfgtable->SCSI_Prefetch));
}
#endif
hpsa_enable_scsi_prefetch(h);
/* Disabling DMA prefetch for the P600
* An ASIC bug may result in a prefetch beyond