[PATCH] speakup_dummy: log about characters received by the dummy driver

[Samuel Thibault]

The dummy speakup driver is used to check that speakup is working
properly, without the need for actually owning the hardware. Some
drivers require receiving characters, so we need a way to check that
this is working properly.

Signed-off-by: Samuel Thibault <samuel.thiba...@ens-lyon.org>

Index: linux-5.9/drivers/accessibility/speakup/speakup_dummy.c
===================================================================
--- linux-5.9.orig/drivers/accessibility/speakup/speakup_dummy.c
+++ linux-5.9/drivers/accessibility/speakup/speakup_dummy.c
@@ -80,6 +80,11 @@ static struct attribute *synth_attrs[] =
        NULL,   /* need to NULL terminate the list of attributes */
 };
 
+static void read_buff_add(u_char c)
+{
+       pr_info("speakup_dummy: got character %02x\n", c);
+}
+
 static struct spk_synth synth_dummy = {
        .name = "dummy",
        .version = DRV_VERSION,
@@ -103,7 +108,7 @@ static struct spk_synth synth_dummy = {
        .flush = spk_synth_flush,
        .is_alive = spk_synth_is_alive_restart,
        .synth_adjust = NULL,
-       .read_buff_add = NULL,
+       .read_buff_add = read_buff_add,
        .get_index = NULL,
        .indexing = {
                .command = NULL,