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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_uli.c
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@@ -57,8 +57,8 @@ struct uli_priv {
};
static int uli_init_one (struct pci_dev *pdev, const struct pci_device_id *ent);
static u32 uli_scr_read (struct ata_port *ap, unsigned int sc_reg);
static void uli_scr_write (struct ata_port *ap, unsigned int sc_reg, u32 val);
static int uli_scr_read (struct ata_port *ap, unsigned int sc_reg, u32 *val);
static int uli_scr_write (struct ata_port *ap, unsigned int sc_reg, u32 val);
static const struct pci_device_id uli_pci_tbl[] = {
{ PCI_VDEVICE(AL, 0x5289), uli_5289 },
@@ -164,20 +164,22 @@ static void uli_scr_cfg_write (struct ata_port *ap, unsigned int scr, u32 val)
pci_write_config_dword(pdev, cfg_addr, val);
}
static u32 uli_scr_read (struct ata_port *ap, unsigned int sc_reg)
static int uli_scr_read (struct ata_port *ap, unsigned int sc_reg, u32 *val)
{
if (sc_reg > SCR_CONTROL)
return 0xffffffffU;
return -EINVAL;
return uli_scr_cfg_read(ap, sc_reg);
*val = uli_scr_cfg_read(ap, sc_reg);
return 0;
}
static void uli_scr_write (struct ata_port *ap, unsigned int sc_reg, u32 val)
static int uli_scr_write (struct ata_port *ap, unsigned int sc_reg, u32 val)
{
if (sc_reg > SCR_CONTROL) //SCR_CONTROL=2, SCR_ERROR=1, SCR_STATUS=0
return;
return -EINVAL;
uli_scr_cfg_write(ap, sc_reg, val);
return 0;
}
static int uli_init_one (struct pci_dev *pdev, const struct pci_device_id *ent)