From bb9cab941c7139304899fa7922f3069bb2097f4e Mon Sep 17 00:00:00 2001
From: Daniel Drake <dsd@laptop.org>
Date: Sun, 17 Jul 2011 16:38:41 +0100
Subject: [PATCH] mmc: print debug messages for runtime PM actions
At http://www.mail-archive.com/linux-mmc@vger.kernel.org/msg08371.html
(thread: "mmc: sdio: reset card during power_restore") we found and
fixed a bug where mmc's runtime power management functions were not being
called. We have now also made improvements to the SDIO powerup routine
which could possibly mask this kind of issue in future.
Add debug messages to the runtime PM hooks so that it is easy to verify
if and when runtime PM is happening.
Signed-off-by: Daniel Drake <dsd@laptop.org>
Signed-off-by: Chris Ball <cjb@laptop.org>
---
drivers/mmc/core/core.c | 8 ++++++++
1 file changed, 8 insertions(+)
diff --git a/drivers/mmc/core/core.c b/drivers/mmc/core/core.c
index ab36c7b491f34..f091b43d00c49 100644
--- a/drivers/mmc/core/core.c
+++ b/drivers/mmc/core/core.c
@@ -1832,6 +1832,10 @@ int mmc_power_save_host(struct mmc_host *host)
{
int ret = 0;
+#ifdef CONFIG_MMC_DEBUG
+ pr_info("%s: %s: powering down\n", mmc_hostname(host), __func__);
+#endif
+
mmc_bus_get(host);
if (!host->bus_ops || host->bus_dead || !host->bus_ops->power_restore) {
@@ -1854,6 +1858,10 @@ int mmc_power_restore_host(struct mmc_host *host)
{
int ret;
+#ifdef CONFIG_MMC_DEBUG
+ pr_info("%s: %s: powering up\n", mmc_hostname(host), __func__);
+#endif
+
mmc_bus_get(host);
if (!host->bus_ops || host->bus_dead || !host->bus_ops->power_restore) {
--
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