Patch "mmc: sdhci: Restore behavior while creating OCR mask" has been added to the 4.1-stable tree

Patch "mmc: sdhci: Restore behavior while creating OCR mask" has been added to the 4.1-stable tree

[gregkh]

This is a note to let you know that I've just added the patch titled

    mmc: sdhci: Restore behavior while creating OCR mask

to the 4.1-stable tree which can be found at:
    http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary

The filename of the patch is:
     mmc-sdhci-restore-behavior-while-creating-ocr-mask.patch
and it can be found in the queue-4.1 subdirectory.

If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@vger.kernel.org> know about it.


>From 5fd26c7ecb32082745b0bd33c8e35badd1cb5a91 Mon Sep 17 00:00:00 2001
From: Ulf Hansson <ulf.hansson@linaro.org>
Date: Fri, 5 Jun 2015 11:40:08 +0200
Subject: mmc: sdhci: Restore behavior while creating OCR mask

From: Ulf Hansson <ulf.hansson@linaro.org>

commit 5fd26c7ecb32082745b0bd33c8e35badd1cb5a91 upstream.

Commit 3a48edc4bd68 ("mmc: sdhci: Use mmc core regulator infrastucture")
changed the behavior for how to assign the ocr_avail mask for the mmc
host. More precisely it started to mask the bits instead of assigning
them.

Restore the behavior, but also make it clear that an OCR mask created
from an external regulator overrides the other ones. The OCR mask is
determined by one of the following with this priority:

1. Supported ranges of external regulator if one supplies VDD
2. Host OCR mask if set by the driver (based on DT properties)
3. The capabilities reported by the controller itself

Fixes: 3a48edc4bd68 ("mmc: sdhci: Use mmc core regulator infrastucture")
Cc: Tim Kryger <tim.kryger@gmail.com>
Reported-by: Yangbo Lu <yangbo.lu@freescale.com>
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
Reviewed-by: Tim Kryger <tim.kryger@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

---
 drivers/mmc/host/sdhci.c |    9 +++++----
 1 file changed, 5 insertions(+), 4 deletions(-)

--- a/drivers/mmc/host/sdhci.c
+++ b/drivers/mmc/host/sdhci.c
@@ -3315,13 +3315,14 @@ int sdhci_add_host(struct sdhci_host *ho
 				   SDHCI_MAX_CURRENT_MULTIPLIER;
 	}
 
-	/* If OCR set by external regulators, use it instead */
+	/* If OCR set by host, use it instead. */
+	if (host->ocr_mask)
+		ocr_avail = host->ocr_mask;
+
+	/* If OCR set by external regulators, give it highest prio. */
 	if (mmc->ocr_avail)
 		ocr_avail = mmc->ocr_avail;
 
-	if (host->ocr_mask)
-		ocr_avail &= host->ocr_mask;
-
 	mmc->ocr_avail = ocr_avail;
 	mmc->ocr_avail_sdio = ocr_avail;
 	if (host->ocr_avail_sdio)


Patches currently in stable-queue which might be from ulf.hansson@linaro.org are

queue-4.1/mmc-sdhci-restore-behavior-while-creating-ocr-mask.patch
queue-4.1/mmc-block-add-missing-mmc_blk_put-in-power_ro_lock_show.patch
queue-4.1/mmc-card-fixup-request-missing-in-mmc_blk_issue_rw_rq.patch