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| author | Stephen M. Cameron <scameron@beardog.cce.hp.com> | 2010-07-19 20:45:41 +0200 |
|---|---|---|
| committer | Jens Axboe <jaxboe@fusionio.com> | 2010-08-07 18:52:11 +0200 |
| commit | 322e304c4d71b79b3950ca560db4868cc3e04ee6 (patch) | |
| tree | 6e49b3739233490a5023b9d99814b047677e9375 /drivers/block/cciss.c | |
| parent | cciss: factor out CISS_signature_present() (diff) | |
| download | linux-322e304c4d71b79b3950ca560db4868cc3e04ee6.tar.xz linux-322e304c4d71b79b3950ca560db4868cc3e04ee6.zip | |
cciss: factor out cciss_enable_scsi_prefetch()
cciss: factor out cciss_enable_scsi_prefetch()
Signed-off-by: Stephen M. Cameron <scameron@beardog.cce.hp.com>
Signed-off-by: Jens Axboe <jaxboe@fusionio.com>
Diffstat (limited to 'drivers/block/cciss.c')
| -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 9a4869572a0b..b4264bcda618 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 |