In interrupt mode we clear the status flags twice, in the interrupt
handler and in i801_check_post(). Remove clearing the status flags
from i801_check_post() and handle polling mode by using the
SMBus unlocking write to also clear the status flags if still set.
To be precise: One could still argue that the status flags are
cleared twice in interrupt mode, but it comes for free.
Signed-off-by: Heiner Kallweit <hkallweit1@gmail.com>
Reviewed-by: Jean Delvare <jdelvare@suse.de>
Tested-by: Jean Delvare <jdelvare@suse.de>
Signed-off-by: Wolfram Sang <wsa@kernel.org>
-/*
- * Convert the status register to an error code, and clear it.
- * Note that status only contains the bits we want to clear, not the
- * actual register value.
- */
static int i801_check_post(struct i801_priv *priv, int status)
{
int result = 0;
static int i801_check_post(struct i801_priv *priv, int status)
{
int result = 0;
!(status & SMBHSTSTS_FAILED))
dev_err(&priv->pci_dev->dev,
"Failed terminating the transaction\n");
!(status & SMBHSTSTS_FAILED))
dev_err(&priv->pci_dev->dev,
"Failed terminating the transaction\n");
- outb_p(STATUS_FLAGS, SMBHSTSTS(priv));
dev_dbg(&priv->pci_dev->dev, "Lost arbitration\n");
}
dev_dbg(&priv->pci_dev->dev, "Lost arbitration\n");
}
- /* Clear status flags except BYTE_DONE, to be cleared by caller */
- outb_p(status, SMBHSTSTS(priv));
-
- /* Unlock the SMBus device for use by BIOS/ACPI */
- outb_p(SMBHSTSTS_INUSE_STS, SMBHSTSTS(priv));
+ /*
+ * Unlock the SMBus device for use by BIOS/ACPI,
+ * and clear status flags if not done already.
+ */
+ outb_p(SMBHSTSTS_INUSE_STS | STATUS_FLAGS, SMBHSTSTS(priv));
pm_runtime_mark_last_busy(&priv->pci_dev->dev);
pm_runtime_put_autosuspend(&priv->pci_dev->dev);
pm_runtime_mark_last_busy(&priv->pci_dev->dev);
pm_runtime_put_autosuspend(&priv->pci_dev->dev);