tty: serial: sh-sci: Fix transmit end interrupt handler

The fourth interrupt on SCI port is transmit end interrupt compared to
the break interrupt on other port types. So, shuffle the interrupts to fix
the transmit end interrupt handler.

Fixes: e1d0be616186 ("sh-sci: Add h8300 SCI")
Cc: stable <stable@kernel.org>
Suggested-by: Geert Uytterhoeven <geert+renesas@glider.be>
Signed-off-by: Biju Das <biju.das.jz@bp.renesas.com>
Link: https://lore.kernel.org/r/20230317150403.154094-1-biju.das.jz@bp.renesas.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

diff --git a/drivers/tty/serial/sh-sci.c b/drivers/tty/serial/sh-sci.c
index 7bd0807..c07663f 100644 (file)
--- a/drivers/tty/serial/sh-sci.c
+++ b/drivers/tty/serial/sh-sci.c
@@ -31,6 +31,7 @@
 #include <linux/ioport.h>
 #include <linux/ktime.h>
 #include <linux/major.h>
+#include <linux/minmax.h>
 #include <linux/module.h>
 #include <linux/mm.h>
 #include <linux/of.h>
@@ -2864,6 +2865,13 @@ static int sci_init_single(struct platform_device *dev,
                        sci_port->irqs[i] = platform_get_irq(dev, i);
        }
 
+       /*
+        * The fourth interrupt on SCI port is transmit end interrupt, so
+        * shuffle the interrupts.
+        */
+       if (p->type == PORT_SCI)
+               swap(sci_port->irqs[SCIx_BRI_IRQ], sci_port->irqs[SCIx_TEI_IRQ]);
+
        /* The SCI generates several interrupts. They can be muxed together or
         * connected to different interrupt lines. In the muxed case only one
         * interrupt resource is specified as there is only one interrupt ID.