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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_promise.c
parent5335b729064e03319cd2d5219770451dbb1d7f67 (diff)
downloadlinux-da3dbb17a0e9a9ec7f5aed95f1fddadb790edc9d.tar.bz2
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_promise.c')
-rw-r--r--drivers/ata/sata_promise.c25
1 files changed, 15 insertions, 10 deletions
diff --git a/drivers/ata/sata_promise.c b/drivers/ata/sata_promise.c
index d2fcb9a6bec2..d39ebc23c4a9 100644
--- a/drivers/ata/sata_promise.c
+++ b/drivers/ata/sata_promise.c
@@ -128,8 +128,8 @@ struct pdc_port_priv {
dma_addr_t pkt_dma;
};
-static u32 pdc_sata_scr_read (struct ata_port *ap, unsigned int sc_reg);
-static void pdc_sata_scr_write (struct ata_port *ap, unsigned int sc_reg, u32 val);
+static int pdc_sata_scr_read(struct ata_port *ap, unsigned int sc_reg, u32 *val);
+static int pdc_sata_scr_write(struct ata_port *ap, unsigned int sc_reg, u32 val);
static int pdc_ata_init_one (struct pci_dev *pdev, const struct pci_device_id *ent);
static int pdc_common_port_start(struct ata_port *ap);
static int pdc_sata_port_start(struct ata_port *ap);
@@ -427,19 +427,20 @@ static int pdc_sata_cable_detect(struct ata_port *ap)
return ATA_CBL_SATA;
}
-static u32 pdc_sata_scr_read (struct ata_port *ap, unsigned int sc_reg)
+static int pdc_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 pdc_sata_scr_write (struct ata_port *ap, unsigned int sc_reg,
- u32 val)
+static int pdc_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;
}
static void pdc_atapi_pkt(struct ata_queued_cmd *qc)
@@ -642,8 +643,12 @@ static void pdc_error_intr(struct ata_port *ap, struct ata_queued_cmd *qc,
| PDC_PCI_SYS_ERR | PDC1_PCI_PARITY_ERR))
ac_err_mask |= AC_ERR_HOST_BUS;
- if (sata_scr_valid(ap))
- ehi->serror |= pdc_sata_scr_read(ap, SCR_ERROR);
+ if (sata_scr_valid(ap)) {
+ u32 serror;
+
+ pdc_sata_scr_read(ap, SCR_ERROR, &serror);
+ ehi->serror |= serror;
+ }
qc->err_mask |= ac_err_mask;