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Date: Thu, 17 Jan 2013 00:01:51 -0800 From: Haojun Bao <hjbao@...vell.com> To: "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>, "linux-serial@...r.kernel.org" <linux-serial@...r.kernel.org> CC: Alan Cox <alan@...ux.intel.com>, Greg Kroah-Hartman <gregkh@...uxfoundation.org>, Jiri Slaby <jslaby@...e.cz>, Russell King - ARM Linux <linux@....linux.org.uk> Subject: [PATCH] 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@...vell.com> --- drivers/tty/serial/pxa.c | 2 -- 1 file changed, 2 deletions(-) diff --git a/drivers/tty/serial/pxa.c b/drivers/tty/serial/pxa.c index 2764828..fa1d5ae 100644 --- a/drivers/tty/serial/pxa.c +++ b/drivers/tty/serial/pxa.c @@ -673,7 +673,6 @@ 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) @@ -702,7 +701,6 @@ 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 -- 1.7.10.4 -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@...r.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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