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authorTejun Heo <htejun@gmail.com>2007-07-16 14:29:40 +0900
committerJeff Garzik <jeff@garzik.org>2007-07-20 08:02:11 -0400
commitda3dbb17a0e9a9ec7f5aed95f1fddadb790edc9d (patch)
tree289239e1eb60168321e905c545aa2e2f3a2b5475 /drivers/ata/sata_vsc.c
parent5335b729064e03319cd2d5219770451dbb1d7f67 (diff)
libata: make ->scr_read/write callbacks return error code
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>
Diffstat (limited to 'drivers/ata/sata_vsc.c')
-rw-r--r--drivers/ata/sata_vsc.c13
1 files changed, 7 insertions, 6 deletions
diff --git a/drivers/ata/sata_vsc.c b/drivers/ata/sata_vsc.c
index 1b5d81faa10..24344d0d057 100644
--- a/drivers/ata/sata_vsc.c
+++ b/drivers/ata/sata_vsc.c
@@ -98,20 +98,21 @@ enum {
VSC_SATA_INT_PHY_CHANGE),
};
-static u32 vsc_sata_scr_read (struct ata_port *ap, unsigned int sc_reg)
+static int vsc_sata_scr_read(struct ata_port *ap, unsigned int sc_reg, u32 *val)
{
if (sc_reg > SCR_CONTROL)
- return 0xffffffffU;
- return readl(ap->ioaddr.scr_addr + (sc_reg * 4));
+ return -EINVAL;
+ *val = readl(ap->ioaddr.scr_addr + (sc_reg * 4));
+ return 0;
}
-static void vsc_sata_scr_write (struct ata_port *ap, unsigned int sc_reg,
- u32 val)
+static int vsc_sata_scr_write(struct ata_port *ap, unsigned int sc_reg, u32 val)
{
if (sc_reg > SCR_CONTROL)
- return;
+ return -EINVAL;
writel(val, ap->ioaddr.scr_addr + (sc_reg * 4));
+ return 0;
}