patches/0456-mmc-tmio-move-mmc_host_ops-to-struct-tmio_mmc_host-f.patch

From a371362459262d700c37096c53907f39f41302d3 Mon Sep 17 00:00:00 2001
From: Masahiro Yamada <yamada.masahiro@socionext.com>
Date: Sat, 25 Nov 2017 01:24:41 +0900
Subject: [PATCH 0456/1795] mmc: tmio: move mmc_host_ops to struct
 tmio_mmc_host from static data

Currently, tmio_mmc_ops is static data and tmio_mmc_host_probe()
updates some hooks in the static data.  This is a problem when
two or more instances call tmio_mmc_host_probe() and each of them
requests to use its own card_busy/start_signal_voltage_switch.

We can borrow a solution from sdhci_alloc_host().  Copy the whole
ops structure to host->mmc_host_ops, then override the hooks in
malloc'ed data.  Constify tmio_mmc_ops since it is now a template
ops used by default.

Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com>
Reviewed-by: Wolfram Sang <wsa+renesas@sang-engineering.com>
Tested-by: Wolfram Sang <wsa+renesas@sang-engineering.com>
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
(cherry picked from commit c055fc75c1757b220108489038cfe60496b13865)
Signed-off-by: Simon Horman <horms+renesas@verge.net.au>
Signed-off-by: Geert Uytterhoeven <geert+renesas@glider.be>
---
 drivers/mmc/host/tmio_mmc.h      | 1 +
 drivers/mmc/host/tmio_mmc_core.c | 9 +++++----
 2 files changed, 6 insertions(+), 4 deletions(-)

diff --git a/drivers/mmc/host/tmio_mmc.h b/drivers/mmc/host/tmio_mmc.h
index cd3d7c8d24bf..405547f88421 100644
--- a/drivers/mmc/host/tmio_mmc.h
+++ b/drivers/mmc/host/tmio_mmc.h
@@ -134,6 +134,7 @@ struct tmio_mmc_host {
 	struct mmc_request      *mrq;
 	struct mmc_data         *data;
 	struct mmc_host         *mmc;
+	struct mmc_host_ops     ops;
 
 	/* Callbacks for clock / power control */
 	void (*set_pwr)(struct platform_device *host, int state);
diff --git a/drivers/mmc/host/tmio_mmc_core.c b/drivers/mmc/host/tmio_mmc_core.c
index f6f47e1ce6dd..5d80055b4bb3 100644
--- a/drivers/mmc/host/tmio_mmc_core.c
+++ b/drivers/mmc/host/tmio_mmc_core.c
@@ -1098,7 +1098,7 @@ static int tmio_multi_io_quirk(struct mmc_card *card,
 	return blk_size;
 }
 
-static struct mmc_host_ops tmio_mmc_ops = {
+static const struct mmc_host_ops tmio_mmc_ops = {
 	.request	= tmio_mmc_request,
 	.set_ios	= tmio_mmc_set_ios,
 	.get_ro         = tmio_mmc_get_ro,
@@ -1158,6 +1158,8 @@ tmio_mmc_host_alloc(struct platform_device *pdev)
 	host = mmc_priv(mmc);
 	host->mmc = mmc;
 	host->pdev = pdev;
+	host->ops = tmio_mmc_ops;
+	mmc->ops = &host->ops;
 
 	return host;
 }
@@ -1203,10 +1205,9 @@ int tmio_mmc_host_probe(struct tmio_mmc_host *_host,
 	if (ret < 0)
 		return ret;
 
-	tmio_mmc_ops.card_busy = _host->card_busy;
-	tmio_mmc_ops.start_signal_voltage_switch =
+	_host->ops.card_busy = _host->card_busy;
+	_host->ops.start_signal_voltage_switch =
 		_host->start_signal_voltage_switch;
-	mmc->ops = &tmio_mmc_ops;
 
 	mmc->caps |= MMC_CAP_4_BIT_DATA | pdata->capabilities;
 	mmc->caps2 |= pdata->capabilities2;
-- 
2.19.0