/**
* zfcp_sysfs_port_failed_store - failed state of port
* @dev: pointer to belonging device
* @buf: pointer to input buffer
* @count: number of bytes in buffer
*
* Store function of the "failed" attribute of a port.
* If a "0" gets written to "failed", error recovery will be
* started for the belonging port.
*/
static ssize_t
zfcp_sysfs_port_failed_store(struct device *dev, struct device_attribute *attr, const char *buf, size_t count)
{
struct zfcp_port *port;
unsigned int val;
char *endp;
int retval = 0;
down(&zfcp_data.config_sema);
port = dev_get_drvdata(dev);
if (atomic_test_mask(ZFCP_STATUS_COMMON_REMOVE, &port->status)) {
retval = -EBUSY;
goto out;
}
val = simple_strtoul(buf, &endp, 0);
if (((endp + 1) < (buf + count)) || (val != 0)) {
retval = -EINVAL;
goto out;
}
zfcp_erp_modify_port_status(port, ZFCP_STATUS_COMMON_RUNNING, ZFCP_SET);
zfcp_erp_port_reopen(port, ZFCP_STATUS_COMMON_ERP_FAILED);
zfcp_erp_wait(port->adapter);
out:
up(&zfcp_data.config_sema);
return retval ? retval : (ssize_t) count;
}
static void zfcp_erp_port_block(struct zfcp_port *port, int clear)
{
zfcp_erp_modify_port_status(port, "erpblk1", NULL,
ZFCP_STATUS_COMMON_UNBLOCKED | clear,
ZFCP_CLEAR);
}
