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| author | Tejun Heo <htejun@gmail.com> | 2007-07-16 09:29:40 +0400 |
|---|---|---|
| committer | Jeff Garzik <jeff@garzik.org> | 2007-07-20 16:02:11 +0400 |
| commit | da3dbb17a0e9a9ec7f5aed95f1fddadb790edc9d (patch) | |
| tree | 289239e1eb60168321e905c545aa2e2f3a2b5475 /drivers/ata/sata_nv.c | |
| parent | 5335b729064e03319cd2d5219770451dbb1d7f67 (diff) | |
| download | linux-da3dbb17a0e9a9ec7f5aed95f1fddadb790edc9d.tar.xz | |
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_nv.c')
| -rw-r--r-- | drivers/ata/sata_nv.c | 16 |
1 files changed, 9 insertions, 7 deletions
diff --git a/drivers/ata/sata_nv.c b/drivers/ata/sata_nv.c index 5d943da042f7..0b58c4df6fd2 100644 --- a/drivers/ata/sata_nv.c +++ b/drivers/ata/sata_nv.c @@ -236,8 +236,8 @@ static void nv_ck804_host_stop(struct ata_host *host); static irqreturn_t nv_generic_interrupt(int irq, void *dev_instance); static irqreturn_t nv_nf2_interrupt(int irq, void *dev_instance); static irqreturn_t nv_ck804_interrupt(int irq, void *dev_instance); -static u32 nv_scr_read (struct ata_port *ap, unsigned int sc_reg); -static void nv_scr_write (struct ata_port *ap, unsigned int sc_reg, u32 val); +static int nv_scr_read (struct ata_port *ap, unsigned int sc_reg, u32 *val); +static int nv_scr_write (struct ata_port *ap, unsigned int sc_reg, u32 val); static void nv_nf2_freeze(struct ata_port *ap); static void nv_nf2_thaw(struct ata_port *ap); @@ -1393,20 +1393,22 @@ static irqreturn_t nv_ck804_interrupt(int irq, void *dev_instance) return ret; } -static u32 nv_scr_read (struct ata_port *ap, unsigned int sc_reg) +static int nv_scr_read(struct ata_port *ap, unsigned int sc_reg, u32 *val) { if (sc_reg > SCR_CONTROL) - return 0xffffffffU; + return -EINVAL; - return ioread32(ap->ioaddr.scr_addr + (sc_reg * 4)); + *val = ioread32(ap->ioaddr.scr_addr + (sc_reg * 4)); + return 0; } -static void nv_scr_write (struct ata_port *ap, unsigned int sc_reg, u32 val) +static int nv_scr_write(struct ata_port *ap, unsigned int sc_reg, u32 val) { if (sc_reg > SCR_CONTROL) - return; + return -EINVAL; iowrite32(val, ap->ioaddr.scr_addr + (sc_reg * 4)); + return 0; } static void nv_nf2_freeze(struct ata_port *ap) |