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authorRussell King <rmk+kernel@arm.linux.org.uk>2014-04-25 12:59:05 +0100
committerChris Ball <chris@printf.net>2014-05-22 07:26:33 -0400
commit10cf4963007ccfad335f57a598d5fd3f7c83c606 (patch)
tree03b258406e337c31697eb36c6acee07155bb09c3 /drivers/mmc
parent9d2fc80fb15b99736ecd1895934ce4512e76fa3f (diff)
downloadop-kernel-dev-10cf4963007ccfad335f57a598d5fd3f7c83c606.zip
op-kernel-dev-10cf4963007ccfad335f57a598d5fd3f7c83c606.tar.gz
mmc: sdhci-esdhc-imx: comment runtime_pm_get_sync() in esdhc_prepare_tuning()
It is far from obvious what this is doing, and it looks like it's an unbalanced runtime_pm_get() call. However, the put is inside sdhci_tasklet_finish(), so it's not unbalanced at all. This should be documented so people know what's going on here. Do so. Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk> Tested-by: Markus Pargmann <mpa@pengutronix.de> Tested-by: Stephen Warren <swarren@nvidia.com> Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org> Signed-off-by: Chris Ball <chris@printf.net>
Diffstat (limited to 'drivers/mmc')
-rw-r--r--drivers/mmc/host/sdhci-esdhc-imx.c1
1 files changed, 1 insertions, 0 deletions
diff --git a/drivers/mmc/host/sdhci-esdhc-imx.c b/drivers/mmc/host/sdhci-esdhc-imx.c
index 5acfe2f..eb7a137 100644
--- a/drivers/mmc/host/sdhci-esdhc-imx.c
+++ b/drivers/mmc/host/sdhci-esdhc-imx.c
@@ -695,6 +695,7 @@ static void esdhc_prepare_tuning(struct sdhci_host *host, u32 val)
/* FIXME: delay a bit for card to be ready for next tuning due to errors */
mdelay(1);
+ /* This is balanced by the runtime put in sdhci_tasklet_finish */
pm_runtime_get_sync(host->mmc->parent);
reg = readl(host->ioaddr + ESDHC_MIX_CTRL);
reg |= ESDHC_MIX_CTRL_EXE_TUNE | ESDHC_MIX_CTRL_SMPCLK_SEL |
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