SCR read for controllers which uses PCI configuration space for SCR
access got broken while adding @val argument to SCR accessors. Fix
it.
Signed-off-by: Tejun Heo <htejun@xxxxxxxxx>
---
drivers/ata/sata_sis.c | 13 ++++++++-----
1 file changed, 8 insertions(+), 5 deletions(-)
diff --git a/drivers/ata/sata_sis.c b/drivers/ata/sata_sis.c
index 8d98a9f..dc8e5c0 100644
--- a/drivers/ata/sata_sis.c
+++ b/drivers/ata/sata_sis.c
@@ -166,11 +166,11 @@ static unsigned int get_scr_cfg_addr(struct ata_port *ap, unsigned int sc_reg)
return addr;
}
-static u32 sis_scr_cfg_read (struct ata_port *ap, unsigned int sc_reg)
+static u32 sis_scr_cfg_read (struct ata_port *ap, unsigned int sc_reg, u32 *val)
{
struct pci_dev *pdev = to_pci_dev(ap->host->dev);
unsigned int cfg_addr = get_scr_cfg_addr(ap, sc_reg);
- u32 val, val2 = 0;
+ u32 val2 = 0;
u8 pmr;
if (sc_reg == SCR_ERROR) /* doesn't exist in PCI cfg space */
@@ -178,13 +178,16 @@ static u32 sis_scr_cfg_read (struct ata_port *ap, unsigned int sc_reg)
pci_read_config_byte(pdev, SIS_PMR, &pmr);
- pci_read_config_dword(pdev, cfg_addr, &val);
+ pci_read_config_dword(pdev, cfg_addr, val);
if ((pdev->device == 0x0182) || (pdev->device == 0x0183) ||
(pdev->device == 0x1182) || (pmr & SIS_PMR_COMBINED))
pci_read_config_dword(pdev, cfg_addr+0x10, &val2);
- return (val|val2) & 0xfffffffb; /* avoid problems with powerdowned ports */
+ *val |= val2;
+ *val &= 0xfffffffb; /* avoid problems with powerdowned ports */
+
+ return 0;
}
static void sis_scr_cfg_write (struct ata_port *ap, unsigned int sc_reg, u32 val)
@@ -214,7 +217,7 @@ static int sis_scr_read(struct ata_port *ap, unsigned int sc_reg, u32 *val)
return -EINVAL;
if (ap->flags & SIS_FLAG_CFGSCR)
- return sis_scr_cfg_read(ap, sc_reg);
+ return sis_scr_cfg_read(ap, sc_reg, val);
pci_read_config_byte(pdev, SIS_PMR, &pmr);
-
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