[PATCH 5.4 08/60] mmc: sdhci-pci-o2micro: Fix card detect by dealing with debouncing

[Greg Kroah-Hartman]

From: Chevron Li <chevron.li@xxxxxxxxxxxxxx>

commit e591fcf6b4e39335c9b128b17738fcd2fdd278ae upstream.

The result from ->get_cd() may be incorrect as the card detect debouncing
isn't managed correctly. Let's fix it.

Signed-off-by: Chevron Li<chevron.li@xxxxxxxxxxxxxx>
Fixes: 7d44061704dd ("mmc: sdhci-pci-o2micro: Fix O2 Host data read/write DLL Lock phase shift issue")
Cc: stable@xxxxxxxxxxxxxxx
Link: https://lore.kernel.org/r/20220602132543.596-1-chevron.li@xxxxxxxxxxxxxx
[Ulf: Updated the commit message]
Signed-off-by: Ulf Hansson <ulf.hansson@xxxxxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
---
 drivers/mmc/host/sdhci-pci-o2micro.c |    2 ++
 1 file changed, 2 insertions(+)

--- a/drivers/mmc/host/sdhci-pci-o2micro.c
+++ b/drivers/mmc/host/sdhci-pci-o2micro.c
@@ -145,6 +145,8 @@ static int sdhci_o2_get_cd(struct mmc_ho
 
 	if (!(sdhci_readw(host, O2_PLL_DLL_WDT_CONTROL1) & O2_PLL_LOCK_STATUS))
 		sdhci_o2_enable_internal_clock(host);
+	else
+		sdhci_o2_wait_card_detect_stable(host);
 
 	return !!(sdhci_readl(host, SDHCI_PRESENT_STATE) & SDHCI_CARD_PRESENT);
 }