3.16.72-rc1 review patch. If anyone has any objections, please let me know.
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From: Samuel Thibault samuel.thibault@ens-lyon.org
commit 45ac7b31bc6c4af885cc5b5d6c534c15bcbe7643 upstream.
When switching from speakup_soft to another synth, speakup_soft would keep calling synth_buffer_getc() from softsynthx_read.
Let's thus make synth.c export the knowledge of the current synth, so that speakup_soft can determine whether it should be running.
speakup_soft also needs to set itself alive, otherwise the switch would let it remain silent.
Signed-off-by: Samuel Thibault samuel.thibault@ens-lyon.org Signed-off-by: Greg Kroah-Hartman gregkh@linuxfoundation.org [bwh: Backported to 3.16: - There's no Unicode support - Adjust context] Signed-off-by: Ben Hutchings ben@decadent.org.uk --- --- a/drivers/staging/speakup/speakup_soft.c +++ b/drivers/staging/speakup/speakup_soft.c @@ -213,10 +213,13 @@ static ssize_t softsynth_read(struct fil DEFINE_WAIT(wait);
spin_lock_irqsave(&speakup_info.spinlock, flags); + synth_soft.alive = 1; while (1) { prepare_to_wait(&speakup_event, &wait, TASK_INTERRUPTIBLE); - if (!synth_buffer_empty() || speakup_info.flushing) - break; + if (synth_current() == &synth_soft) { + if (!synth_buffer_empty() || speakup_info.flushing) + break; + } spin_unlock_irqrestore(&speakup_info.spinlock, flags); if (fp->f_flags & O_NONBLOCK) { finish_wait(&speakup_event, &wait); @@ -234,6 +237,8 @@ static ssize_t softsynth_read(struct fil cp = buf; init = get_initstring(); while (chars_sent < count) { + if (synth_current() != &synth_soft) + break; if (speakup_info.flushing) { speakup_info.flushing = 0; ch = '\x18'; @@ -286,7 +291,8 @@ static unsigned int softsynth_poll(struc poll_wait(fp, &speakup_event, wait);
spin_lock_irqsave(&speakup_info.spinlock, flags); - if (!synth_buffer_empty() || speakup_info.flushing) + if (synth_current() == &synth_soft && + (!synth_buffer_empty() || speakup_info.flushing)) ret = POLLIN | POLLRDNORM; spin_unlock_irqrestore(&speakup_info.spinlock, flags); return ret; --- a/drivers/staging/speakup/spk_priv.h +++ b/drivers/staging/speakup/spk_priv.h @@ -72,6 +72,7 @@ extern int synth_request_region(u_long, extern int synth_release_region(u_long, u_long); extern int synth_add(struct spk_synth *in_synth); extern void synth_remove(struct spk_synth *in_synth); +struct spk_synth *synth_current(void);
extern struct speakup_info_t speakup_info;
--- a/drivers/staging/speakup/synth.c +++ b/drivers/staging/speakup/synth.c @@ -475,4 +475,10 @@ void synth_remove(struct spk_synth *in_s } EXPORT_SYMBOL_GPL(synth_remove);
+struct spk_synth *synth_current(void) +{ + return synth; +} +EXPORT_SYMBOL_GPL(synth_current); + short spk_punc_masks[] = { 0, SOME, MOST, PUNC, PUNC|B_SYM };