serial: pxa: Do not tweak clock in pxa serial write() function

The write() function could be used by printk(), which is atomic and
tweaking clock there can cause "BUG: sleeping function called from
invalid context".

Signed-off-by: Bao Haojun <hjbao@marvell.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

1 files changed, 0 insertions, 2 deletions

diff --git a/drivers/tty/serial/pxa.c b/drivers/tty/serial/pxa.c
index 3b671bc3f966..a67f9e156ada 100644
--- a/drivers/tty/serial/pxa.c
+++ b/drivers/tty/serial/pxa.c
@@ -672,7 +672,6 @@ serial_pxa_console_write(struct console *co, const char *s, unsigned int count)
         unsigned long flags;
         int locked = 1;
 
-        clk_prepare_enable(up->clk);
 
         local_irq_save(flags);
         if (up->port.sysrq)
@@ -701,7 +700,6 @@ serial_pxa_console_write(struct console *co, const char *s, unsigned int count)
                 spin_unlock(&up->port.lock);
         local_irq_restore(flags);
 
-        clk_disable_unprepare(up->clk);
 }
 
 #ifdef CONFIG_CONSOLE_POLL