Merge branch 'omap-fixes-for-linus' of git://git.kernel.org/pub/scm/linux/kernel...

* 'omap-fixes-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tmlind/linux-omap-2.6:
  OMAP2+: PM/serial: hold console semaphore while OMAP UARTs are disabled
  OMAP: UART: don't resume UARTs that are not enabled.

diff --git a/arch/arm/mach-omap2/pm24xx.c b/arch/arm/mach-omap2/pm24xx.c
index a40457d..c85923e 100644 (file)
--- a/arch/arm/mach-omap2/pm24xx.c
+++ b/arch/arm/mach-omap2/pm24xx.c
@@ -30,6 +30,7 @@
 #include <linux/irq.h>
 #include <linux/time.h>
 #include <linux/gpio.h>
+#include <linux/console.h>
 
 #include <asm/mach/time.h>
 #include <asm/mach/irq.h>
@@ -118,6 +119,10 @@ static void omap2_enter_full_retention(void)
        if (omap_irq_pending())
                goto no_sleep;
 
+       /* Block console output in case it is on one of the OMAP UARTs */
+       if (try_acquire_console_sem())
+               goto no_sleep;
+
        omap_uart_prepare_idle(0);
        omap_uart_prepare_idle(1);
        omap_uart_prepare_idle(2);
@@ -131,6 +136,8 @@ static void omap2_enter_full_retention(void)
        omap_uart_resume_idle(1);
        omap_uart_resume_idle(0);
 
+       release_console_sem();
+
 no_sleep:
        if (omap2_pm_debug) {
                unsigned long long tmp;

diff --git a/arch/arm/mach-omap2/pm34xx.c b/arch/arm/mach-omap2/pm34xx.c
index 75c0cd1..0ec8a04 100644 (file)
--- a/arch/arm/mach-omap2/pm34xx.c
+++ b/arch/arm/mach-omap2/pm34xx.c
@@ -28,6 +28,7 @@
 #include <linux/clk.h>
 #include <linux/delay.h>
 #include <linux/slab.h>
+#include <linux/console.h>
 
 #include <plat/sram.h>
 #include <plat/clockdomain.h>
@@ -385,6 +386,12 @@ void omap_sram_idle(void)
                omap3_enable_io_chain();
        }
 
+       /* Block console output in case it is on one of the OMAP UARTs */
+       if (per_next_state < PWRDM_POWER_ON ||
+           core_next_state < PWRDM_POWER_ON)
+               if (try_acquire_console_sem())
+                       goto console_still_active;
+
        /* PER */
        if (per_next_state < PWRDM_POWER_ON) {
                omap_uart_prepare_idle(2);
@@ -463,6 +470,9 @@ void omap_sram_idle(void)
                omap_uart_resume_idle(3);
        }
 
+       release_console_sem();
+
+console_still_active:
        /* Disable IO-PAD and IO-CHAIN wakeup */
        if (omap3_has_io_wakeup() &&
            (per_next_state < PWRDM_POWER_ON ||

diff --git a/arch/arm/mach-omap2/serial.c b/arch/arm/mach-omap2/serial.c
index becf0e3..d17960a 100644 (file)
--- a/arch/arm/mach-omap2/serial.c
+++ b/arch/arm/mach-omap2/serial.c
@@ -27,6 +27,7 @@
 #include <linux/slab.h>
 #include <linux/serial_8250.h>
 #include <linux/pm_runtime.h>
+#include <linux/console.h>
 
 #ifdef CONFIG_SERIAL_OMAP
 #include <plat/omap-serial.h>
@@ -406,7 +407,7 @@ void omap_uart_resume_idle(int num)
        struct omap_uart_state *uart;
 
        list_for_each_entry(uart, &uart_list, node) {
-               if (num == uart->num) {
+               if (num == uart->num && uart->can_sleep) {
                        omap_uart_enable_clocks(uart);
 
                        /* Check for IO pad wakeup */
@@ -807,6 +808,8 @@ void __init omap_serial_init_port(int port)
 
        oh->dev_attr = uart;
 
+       acquire_console_sem(); /* in case the earlycon is on the UART */
+
        /*
         * Because of early UART probing, UART did not get idled
         * on init.  Now that omap_device is ready, ensure full idle
@@ -831,6 +834,8 @@ void __init omap_serial_init_port(int port)
        omap_uart_block_sleep(uart);
        uart->timeout = DEFAULT_TIMEOUT;
 
+       release_console_sem();
+
        if ((cpu_is_omap34xx() && uart->padconf) ||
            (uart->wk_en && uart->wk_mask)) {
                device_init_wakeup(&od->pdev.dev, true);