From 2c4967f741e87cdd63de7271b97807041dccbf3b Mon Sep 17 00:00:00 2001 From: Sujit Reddy Thumma Date: Sat, 4 Feb 2012 16:14:50 -0500 Subject: mmc: core: Ensure clocks are always enabled before host interaction Ensure clocks are always enabled before any interaction with the host controller driver. This makes sure that there is no race between host execution and the core layer turning off clocks in different context with clock gating framework. Signed-off-by: Sujit Reddy Thumma Acked-by: Linus Walleij Acked-by: Per Forlin Signed-off-by: Chris Ball --- drivers/mmc/core/sdio_irq.c | 10 ++++++++-- 1 file changed, 8 insertions(+), 2 deletions(-) (limited to 'drivers/mmc/core/sdio_irq.c') diff --git a/drivers/mmc/core/sdio_irq.c b/drivers/mmc/core/sdio_irq.c index 68f81b9ee0fb..f573e7f9f740 100644 --- a/drivers/mmc/core/sdio_irq.c +++ b/drivers/mmc/core/sdio_irq.c @@ -146,15 +146,21 @@ static int sdio_irq_thread(void *_host) } set_current_state(TASK_INTERRUPTIBLE); - if (host->caps & MMC_CAP_SDIO_IRQ) + if (host->caps & MMC_CAP_SDIO_IRQ) { + mmc_host_clk_hold(host); host->ops->enable_sdio_irq(host, 1); + mmc_host_clk_release(host); + } if (!kthread_should_stop()) schedule_timeout(period); set_current_state(TASK_RUNNING); } while (!kthread_should_stop()); - if (host->caps & MMC_CAP_SDIO_IRQ) + if (host->caps & MMC_CAP_SDIO_IRQ) { + mmc_host_clk_hold(host); host->ops->enable_sdio_irq(host, 0); + mmc_host_clk_release(host); + } pr_debug("%s: IRQ thread exiting with code %d\n", mmc_hostname(host), ret); -- cgit v1.2.3