[PATCH] mmc: core: sd: check card write-protect lock while resuming

[Barry Song]

From: Minda Chen <Minda.Chen at csr.com>

After suspending, unplug the sdcard, and set sd WP lock,
insert it again, then resume the system. resume codes do
not check the the sdcard write-proctect lock. now check
it.

Signed-off-by: Minda Chen <Minda.Chen at csr.com>
Signed-off-by: Barry Song <Baohua.Song at csr.com>
---
 drivers/mmc/core/sd.c | 7 +++++++
 1 file changed, 7 insertions(+)

diff --git a/drivers/mmc/core/sd.c b/drivers/mmc/core/sd.c
index 0c44510..890557a 100644
--- a/drivers/mmc/core/sd.c
+++ b/drivers/mmc/core/sd.c
@@ -910,6 +910,7 @@ static int mmc_sd_init_card(struct mmc_host *host, u32 ocr,
 	int err;
 	u32 cid[4];
 	u32 rocr = 0;
+	bool oldro, ro;
 
 	BUG_ON(!host);
 	WARN_ON(!host->claimed);
@@ -922,6 +923,12 @@ static int mmc_sd_init_card(struct mmc_host *host, u32 ocr,
 		if (memcmp(cid, oldcard->raw_cid, sizeof(cid)) != 0)
 			return -ENOENT;
 
+		if (host->ops->get_ro) {
+			ro = host->ops->get_ro(host) ? true : false;
+			oldro = mmc_card_readonly(oldcard) ? true : false;
+			if (oldro ^ ro)
+				return -ENOENT;
+		}
 		card = oldcard;
 	} else {
 		/*
-- 
2.0.4



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