[libata] Disable FUA

Until problems are sorted.

drivers/scsi/libata-core.c

@@ -82,6 +82,10 @@ int atapi_enabled = 0;
 module_param(atapi_enabled, int, 0444);
 MODULE_PARM_DESC(atapi_enabled, "Enable discovery of ATAPI devices (0=off, 1=on)");
 
+int libata_fua = 0;
+module_param_named(fua, libata_fua, int, 0444);
+MODULE_PARM_DESC(fua, "FUA support (0=off, 1=on)");
+
 MODULE_AUTHOR("Jeff Garzik");
 MODULE_DESCRIPTION("Library module for ATA devices");
 MODULE_LICENSE("GPL");

drivers/scsi/libata-scsi.c

@@ -1708,6 +1708,8 @@ static int ata_dev_supports_fua(u16 *id)
 {
 	unsigned char model[41], fw[9];
 
+	if (!libata_fua)
+		return 0;
 	if (!ata_id_has_fua(id))
 		return 0;
 

drivers/scsi/libata.h

@@ -41,6 +41,7 @@ struct ata_scsi_args {
 
 /* libata-core.c */
 extern int atapi_enabled;
+extern int libata_fua;
 extern struct ata_queued_cmd *ata_qc_new_init(struct ata_port *ap,
 				      struct ata_device *dev);
 extern int ata_rwcmd_protocol(struct ata_queued_cmd *qc);