[PATCH/RFC] mmc: core: disable power off notification when host is removed

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User is possible to turn the power off after a host was removed.
So, disable the power off notification when a host is removed.

Signed-off-by: Yoshihiro Shimoda <yoshihiro.shimoda.uh@xxxxxxxxxxx>
---
 This topic was discussed in a few month ago [1], and now I could make
 a patch for unbinding the mmc host. I'm not sure this is a correct way
 so that I marked RFC.

 [1]
  https://patchwork.kernel.org/patch/11557505/#23408537

 drivers/mmc/core/mmc.c | 9 +++++++++
 1 file changed, 9 insertions(+)

diff --git a/drivers/mmc/core/mmc.c b/drivers/mmc/core/mmc.c
index ff3063c..abc4cac 100644
--- a/drivers/mmc/core/mmc.c
+++ b/drivers/mmc/core/mmc.c
@@ -1988,6 +1988,15 @@ static int mmc_poweroff_notify(struct mmc_card *card, unsigned int notify_type)
  */
 static void mmc_remove(struct mmc_host *host)
 {
+	/*
+	 * Disable power_off_notification byte in the ext_csd register
+	 */
+	if (host->card->ext_csd.rev >= 6) {
+		mmc_claim_host(host);
+		mmc_poweroff_notify(host->card, EXT_CSD_NO_POWER_NOTIFICATION);
+		mmc_release_host(host);
+	}
+
 	mmc_remove_card(host->card);
 	host->card = NULL;
 }
-- 
2.7.4




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