From 747cd994470e04c0baff7bfa616f7e4ea528e5b4 Mon Sep 17 00:00:00 2001
From: OBattler <oubattler@gmail.com>
Date: Sun, 22 Sep 2019 22:54:05 +0200
Subject: [PATCH] Fixed printer IRQ handling, hopefully it now operates
 correctly.

---
 src/printer/prt_escp.c | 3 ++-
 src/printer/prt_text.c | 2 +-
 2 files changed, 3 insertions(+), 2 deletions(-)

diff --git a/src/printer/prt_escp.c b/src/printer/prt_escp.c
index 5d6b3fa31..e45dba752 100644
--- a/src/printer/prt_escp.c
+++ b/src/printer/prt_escp.c
@@ -519,6 +519,7 @@ static void
 reset_printer_hard(escp_t *dev)
 {
     dev->char_read = 0;
+    lpt_irq(dev->lpt, 1);
     timer_disable(&dev->timeout_timer);
     reset_printer(dev);
 }
@@ -1590,7 +1591,6 @@ handle_char(escp_t *dev, uint8_t ch)
     double x_advance;
 
     dev->char_read = 1;
-    lpt_irq(dev->lpt, 1);
 
     if (dev->page == NULL)
 	return;
@@ -1762,6 +1762,7 @@ print_ack(escp_t *dev)
 {
     if (dev->char_read) {
 	dev->char_read = 0;
+	lpt_irq(dev->lpt, 1);
 	return 1;
     }
 
diff --git a/src/printer/prt_text.c b/src/printer/prt_text.c
index 5f24f9587..a25616c67 100644
--- a/src/printer/prt_text.c
+++ b/src/printer/prt_text.c
@@ -394,7 +394,6 @@ write_ctrl(uint8_t val, void *priv)
 
 	/* ACK it, will be read on next READ STATUS. */
 	dev->ack = 1;
-	lpt_irq(dev->lpt, 1);
 
 	timer_set_delay_u64(&dev->timeout_timer, 500000 * TIMER_USEC);
     }
@@ -419,6 +418,7 @@ read_status(void *priv)
 
     /* Clear ACK after reading status. */
     dev->ack = 0;
+    lpt_irq(dev->lpt, 1);
 
     return(ret);
 }