MMC core code add 'MMC_CAP_RUNTIME_RESUME', postpone the real card
resume operation from bus_resume to bus_runtime_resume. So after
system resume, for non-removable-card, it still not really resume.
At this point, if user cat the ios or clock node, only can get zero
data although the mmc/sd card is still present.
This patch add mmc_get_card() to make sure card really resume back
when user cat ios or clock debugfs file node, then user can get the
correct information.
Signed-off-by: Haibo Chen <haibo.chen@xxxxxxx>
---
drivers/mmc/core/debugfs.c | 10 ++++++++++
1 file changed, 10 insertions(+)
diff --git a/drivers/mmc/core/debugfs.c b/drivers/mmc/core/debugfs.c
index a1fba57..23ec9d3 100644
--- a/drivers/mmc/core/debugfs.c
+++ b/drivers/mmc/core/debugfs.c
@@ -58,6 +58,9 @@ static int mmc_ios_show(struct seq_file *s, void *data)
struct mmc_ios *ios = &host->ios;
const char *str;
+ if (host->card)
+ mmc_get_card(host->card);
+
seq_printf(s, "clock:\t\t%u Hz\n", ios->clock);
if (host->actual_clock)
seq_printf(s, "actual clock:\t%u Hz\n", host->actual_clock);
@@ -194,6 +197,9 @@ static int mmc_ios_show(struct seq_file *s, void *data)
}
seq_printf(s, "driver type:\t%u (%s)\n", ios->drv_type, str);
+ if (host->card)
+ mmc_put_card(host->card);
+
return 0;
}
@@ -213,7 +219,11 @@ static int mmc_clock_opt_get(void *data, u64 *val)
{
struct mmc_host *host = data;
+ if (host->card)
+ mmc_get_card(host->card);
*val = host->ios.clock;
+ if (host->card)
+ mmc_put_card(host->card);
return 0;
}
--
1.9.1
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