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path: root/drivers/ata/libahci.c
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Diffstat (limited to 'drivers/ata/libahci.c')
-rw-r--r--drivers/ata/libahci.c26
1 files changed, 6 insertions, 20 deletions
diff --git a/drivers/ata/libahci.c b/drivers/ata/libahci.c
index 1984a6e89e84..81e772a94d59 100644
--- a/drivers/ata/libahci.c
+++ b/drivers/ata/libahci.c
@@ -324,6 +324,7 @@ static ssize_t ahci_store_em_buffer(struct device *dev,
struct ahci_host_priv *hpriv = ap->host->private_data;
void __iomem *mmio = hpriv->mmio;
void __iomem *em_mmio = mmio + hpriv->em_loc;
+ const unsigned char *msg_buf = buf;
u32 em_ctl, msg;
unsigned long flags;
int i;
@@ -343,8 +344,8 @@ static ssize_t ahci_store_em_buffer(struct device *dev,
}
for (i = 0; i < size; i += 4) {
- msg = buf[i] | buf[i + 1] << 8 |
- buf[i + 2] << 16 | buf[i + 3] << 24;
+ msg = msg_buf[i] | msg_buf[i + 1] << 8 |
+ msg_buf[i + 2] << 16 | msg_buf[i + 3] << 24;
writel(msg, em_mmio + i);
}
@@ -541,29 +542,11 @@ static int ahci_scr_write(struct ata_link *link, unsigned int sc_reg, u32 val)
return -EINVAL;
}
-static int ahci_is_device_present(void __iomem *port_mmio)
-{
- u8 status = readl(port_mmio + PORT_TFDATA) & 0xff;
-
- /* Make sure PxTFD.STS.BSY and PxTFD.STS.DRQ are 0 */
- if (status & (ATA_BUSY | ATA_DRQ))
- return 0;
-
- /* Make sure PxSSTS.DET is 3h */
- status = readl(port_mmio + PORT_SCR_STAT) & 0xf;
- if (status != 3)
- return 0;
- return 1;
-}
-
void ahci_start_engine(struct ata_port *ap)
{
void __iomem *port_mmio = ahci_port_base(ap);
u32 tmp;
- if (!ahci_is_device_present(port_mmio))
- return;
-
/* start DMA */
tmp = readl(port_mmio + PORT_CMD);
tmp |= PORT_CMD_START;
@@ -1892,6 +1875,9 @@ static void ahci_error_handler(struct ata_port *ap)
}
sata_pmp_error_handler(ap);
+
+ if (!ata_dev_enabled(ap->link.device))
+ ahci_stop_engine(ap);
}
static void ahci_post_internal_cmd(struct ata_queued_cmd *qc)