staging: speakup: move spk_stop_serial_interrupt into synth-specific release function

This moves call to spk_stop_serial_interrupt() function out of synth_release()
and into release() method of specific spk_synth instances. This is because
the spk_stop_serial_interrupt() call is specific to current serial i/o
implementation. Moving it into each synth's release() method gives the
decision of calling  spk_stop_serial_interrupt() to that synth.
Signed-off-by: Okash Khawaja <okash.khawaja@gmail.com>
Reviewed-by: Samuel Thibault <samuel.thibault@ens-lyon.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

drivers/staging/speakup/serialio.c

@@ -148,6 +148,7 @@ void spk_stop_serial_interrupt(void)
 	/* Free IRQ */
 	free_irq(serstate->irq, (void *)synth_readbuf_handler);
 }
+EXPORT_SYMBOL_GPL(spk_stop_serial_interrupt);
 
 int spk_wait_for_xmitr(struct spk_synth *in_synth)
 {
@@ -223,6 +224,7 @@ int spk_serial_out(struct spk_synth *in_synth, const char ch)
 
 void spk_serial_release(void)
 {
+	spk_stop_serial_interrupt();
 	if (speakup_info.port_tts == 0)
 		return;
 	synth_release_region(speakup_info.port_tts, 8);

drivers/staging/speakup/speakup_acntpc.c

@@ -304,6 +304,7 @@ static int synth_probe(struct spk_synth *synth)
 
 static void accent_release(void)
 {
+	spk_stop_serial_interrupt();
 	if (speakup_info.port_tts)
 		synth_release_region(speakup_info.port_tts-1, SYNTH_IO_EXTENT);
 	speakup_info.port_tts = 0;

drivers/staging/speakup/speakup_decpc.c

@@ -481,6 +481,7 @@ static int synth_probe(struct spk_synth *synth)
 
 static void dtpc_release(void)
 {
+	spk_stop_serial_interrupt();
 	if (speakup_info.port_tts)
 		synth_release_region(speakup_info.port_tts, SYNTH_IO_EXTENT);
 	speakup_info.port_tts = 0;

drivers/staging/speakup/speakup_dtlk.c

@@ -375,6 +375,7 @@ static int synth_probe(struct spk_synth *synth)
 
 static void dtlk_release(void)
 {
+	spk_stop_serial_interrupt();
 	if (speakup_info.port_tts)
 		synth_release_region(speakup_info.port_tts-1, SYNTH_IO_EXTENT);
 	speakup_info.port_tts = 0;

drivers/staging/speakup/speakup_keypc.c

@@ -306,6 +306,7 @@ static int synth_probe(struct spk_synth *synth)
 
 static void keynote_release(void)
 {
+	spk_stop_serial_interrupt();
 	if (synth_port)
 		synth_release_region(synth_port, SYNTH_IO_EXTENT);
 	synth_port = 0;

drivers/staging/speakup/synth.c

@@ -462,7 +462,6 @@ void synth_release(void)
 		sysfs_remove_group(speakup_kobj, &synth->attributes);
 	for (var = synth->vars; var->var_id != MAXVARS; var++)
 		speakup_unregister_var(var->var_id);
-	spk_stop_serial_interrupt();
 	synth->release();
 	synth = NULL;
 }