speakup_dummy: log about characters received by the dummy driver

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.thibault@ens-lyon.org>
Link: https://lore.kernel.org/r/20201101183913.yg35cbqpn2ba6cew@function
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

diff --git a/drivers/accessibility/speakup/speakup_dummy.c b/drivers/accessibility/speakup/speakup_dummy.c
index e393438af81bd652aeb3ffee58a5a2f2e8d5dd5d..63c2f29432823ce9cbcb28ef2e019986c83857c8 100644 (file)
--- a/drivers/accessibility/speakup/speakup_dummy.c
+++ b/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,