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libata: make ->scr_read/write callbacks return error code

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Convert ->scr_read/write callbacks to return error code to better
indicate failure.  This will help handling of SCR_NOTIFICATION.

Signed-off-by: Tejun Heo <htejun@gmail.com>
Signed-off-by: Jeff Garzik <jeff@garzik.org>
This commit is contained in:
Tejun Heo
2007-07-16 14:29:40 +09:00
committed by Jeff Garzik
parent 5335b72906
commit da3dbb17a0
15 changed files with 191 additions and 136 deletions
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16
drivers/ata/sata_inic162x.c
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@@ -190,34 +190,34 @@ static void inic_reset_port(void __iomem *port_base)
writew(ctl, idma_ctl);
}
static u32 inic_scr_read(struct ata_port *ap, unsigned sc_reg)
static int inic_scr_read(struct ata_port *ap, unsigned sc_reg, u32 *val)
{
void __iomem *scr_addr = ap->ioaddr.scr_addr;
void __iomem *addr;
u32 val;
if (unlikely(sc_reg >= ARRAY_SIZE(scr_map)))
return 0xffffffffU;
return -EINVAL;
addr = scr_addr + scr_map[sc_reg] * 4;
val = readl(scr_addr + scr_map[sc_reg] * 4);
*val = readl(scr_addr + scr_map[sc_reg] * 4);
/* this controller has stuck DIAG.N, ignore it */
if (sc_reg == SCR_ERROR)
val &= ~SERR_PHYRDY_CHG;
return val;
*val &= ~SERR_PHYRDY_CHG;
return 0;
}
static void inic_scr_write(struct ata_port *ap, unsigned sc_reg, u32 val)
static int inic_scr_write(struct ata_port *ap, unsigned sc_reg, u32 val)
{
void __iomem *scr_addr = ap->ioaddr.scr_addr;
void __iomem *addr;
if (unlikely(sc_reg >= ARRAY_SIZE(scr_map)))
return;
return -EINVAL;
addr = scr_addr + scr_map[sc_reg] * 4;
writel(val, scr_addr + scr_map[sc_reg] * 4);
return 0;
}
/*