serial: cpm_uart: No LF conversion in put_poll_char()

In (c7d44a02a serial_core: Commonalize crlf when working w/ a non open
console port) the core was modified to make the UART poll_put_char()
automatically convert LF to CRLF. This driver's poll_put_char() adds a
CR itself and this was not disabled by the above patch meaning
currently it sends two CR characters.

The code to issue a character is shared by the console write code (where
driver must do LF to CRLF conversion, although it can make use of the
uart_console_write() helper function) and the poll_put_char (where
driver must not do the conversion). For that reason we add a flag rather
than simply rip out the conversion code.

Signed-off-by: Daniel Thompson <daniel.thompson@linaro.org>
Cc: Doug Anderson <dianders@chromium.org>
Cc: Jiri Slaby <jslaby@suse.cz>
Cc: Christophe Leroy <christophe.leroy@c-s.fr>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

1 files changed, 4 insertions, 4 deletions

diff --git a/drivers/tty/serial/cpm_uart/cpm_uart_core.c b/drivers/tty/serial/cpm_uart/cpm_uart_core.c
index 7d76214612c7..aa60e6d13eca 100644
--- a/drivers/tty/serial/cpm_uart/cpm_uart_core.c
+++ b/drivers/tty/serial/cpm_uart/cpm_uart_core.c
@@ -971,7 +971,7 @@ static void cpm_uart_config_port(struct uart_port *port, int flags)
  * Note that this is called with interrupts already disabled
  */
 static void cpm_uart_early_write(struct uart_cpm_port *pinfo,
-                const char *string, u_int count)
+                const char *string, u_int count, bool handle_linefeed)
 {
         unsigned int i;
         cbd_t __iomem *bdp, *bdbase;
@@ -1013,7 +1013,7 @@ static void cpm_uart_early_write(struct uart_cpm_port *pinfo,
                         bdp++;
 
                 /* if a LF, also do CR... */
-                if (*string == 10) {
+                if (handle_linefeed && *string == 10) {
                         while ((in_be16(&bdp->cbd_sc) & BD_SC_READY) != 0)
                                 ;
 
@@ -1111,7 +1111,7 @@ static void cpm_put_poll_char(struct uart_port *port,
         static char ch[2];
 
         ch[0] = (char)c;
-        cpm_uart_early_write(pinfo, ch, 1);
+        cpm_uart_early_write(pinfo, ch, 1, false);
 }
 #endif /* CONFIG_CONSOLE_POLL */
 
@@ -1275,7 +1275,7 @@ static void cpm_uart_console_write(struct console *co, const char *s,
                 spin_lock_irqsave(&pinfo->port.lock, flags);
         }
 
-        cpm_uart_early_write(pinfo, s, count);
+        cpm_uart_early_write(pinfo, s, count, true);
 
         if (unlikely(nolock)) {
                 local_irq_restore(flags);