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authorDaniel Drake <dsd@laptop.org>2011-07-17 16:38:41 +0100
committerChris Ball <cjb@laptop.org>2011-07-21 10:35:09 -0400
commitbb9cab941c7139304899fa7922f3069bb2097f4e (patch)
treeff855b6d5ded64f6c47338d1b82c7cf3c6860261
parentecc024419a13da1e589aebc422d9d1e3c0124ba4 (diff)
downloadlinux-bb9cab941c7139304899fa7922f3069bb2097f4e.tar.bz2
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>
-rw-r--r--drivers/mmc/core/core.c8
1 files changed, 8 insertions, 0 deletions
diff --git a/drivers/mmc/core/core.c b/drivers/mmc/core/core.c
index ab36c7b491f3..f091b43d00c4 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) {