[PATCH] qlogic lockup fix

If qla2x00_probe_one()'s call to qla2x00_iospace_config() fails, we call
qla2x00_free_device() to clean up. But because ha->dpc_pid hasn't been set
yet, qla2x00_free_device() tries to stop a kernel thread which hasn't started
yet. It does wait_for_completion() against an uninitialised completion struct
and the kernel hangs up.

Fix it by initialising ha->dpc_pid a bit earlier.

Cc: Andrew Vasquez <[e-mail]>
Cc: James Bottomley <[e-mail]>
Signed-off-by: Andrew Morton <[e-mail]>
Signed-off-by: Linus Torvalds <[e-mail]>

drivers/scsi/qla2xxx/qla_os.c

···
 	ha->brd_info = brd_info;
 	sprintf(ha->host_str, "%s_%ld", ha->brd_info->drv_name, ha->host_no);
 
+	ha->dpc_pid = -1;
+
 	/* Configure PCI I/O space */
 	ret = qla2x00_iospace_config(ha);
 	if (ret)
···
 	 */
 	spin_lock_init(&ha->mbx_reg_lock);
 
-	ha->dpc_pid = -1;
 	init_completion(&ha->dpc_inited);
 	init_completion(&ha->dpc_exited);