linux-kernel - Re: [PATCH 1/2] mmc: omap_hsmmc: stop using .enable and .disable method.

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Date:	Thu, 26 Mar 2015 12:18:23 +1100
From:	NeilBrown <neilb@...e.de>
To:	NeilBrown <neil@...wn.name>
Cc:	Tony Lindgren <tony@...mide.com>,
	Ulf Hansson <ulf.hansson@...aro.org>,
	Adrian Hunter <adrian.hunter@...el.com>,
	Chris Ball <chris@...ntf.net>, linux-omap@...r.kernel.org,
	linux-mmc@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH 1/2] mmc: omap_hsmmc: stop using .enable and .disable
 method.

On Thu, 26 Mar 2015 08:43:37 +1100 NeilBrown <neil@...wn.name> wrote:

> enable and disable are only used to get and put
> runtime pm references.  .set_ios already does this
> itself, and other drivers just do it in set_ios
> and .request without using enable/disable.
> 
> So add pm_runtime get/put to omap_hsmmc_request(),
> and discard the enable/disable methods.
> 
> Signed-off-by: NeilBrown <neil@...wn.name>

Sorry, that patch wasn't much good.  This one I have really tested properly
and checked that the 'put' match the 'get's and  that the device to regularly
go to sleep as expected.

NeilBrown


From: NeilBrown <neil@...wn.name>
Date: Thu, 26 Mar 2015 08:28:43 +1100
Subject: [PATCH] mmc: omap_hsmmc: stop using .enable and .disable method.

enable and disable are only used to get and put
runtime pm references.  .set_ios already does this
itself, and other drivers just do it in set_ios
and .request without using enable/disable.

So add pm_runtime get/put to omap_hsmmc_request(),
and discard the enable/disable methods.

Signed-off-by: NeilBrown <neil@...wn.name>

diff --git a/drivers/mmc/host/omap_hsmmc.c b/drivers/mmc/host/omap_hsmmc.c
index f84cfb01716d..2cb81538a612 100644
--- a/drivers/mmc/host/omap_hsmmc.c
+++ b/drivers/mmc/host/omap_hsmmc.c
@@ -882,6 +882,8 @@ static void omap_hsmmc_request_done(struct omap_hsmmc_host *host, struct mmc_req
 		return;
 	host->mrq = NULL;
 	mmc_request_done(host->mmc, mrq);
+	pm_runtime_mark_last_busy(host->dev);
+	pm_runtime_put_autosuspend(host->dev);
 }
 
 /*
@@ -1305,6 +1307,8 @@ static void omap_hsmmc_dma_callback(void *param)
 
 		host->mrq = NULL;
 		mmc_request_done(host->mmc, mrq);
+		pm_runtime_mark_last_busy(host->dev);
+		pm_runtime_put_autosuspend(host->dev);
 	}
 }
 
@@ -1537,6 +1541,7 @@ static void omap_hsmmc_request(struct mmc_host *mmc, struct mmc_request *req)
 
 	BUG_ON(host->req_in_progress);
 	BUG_ON(host->dma_ch != -1);
+	pm_runtime_get_sync(host->dev);
 	if (host->protect_card) {
 		if (host->reqs_blocked < 3) {
 			/*
@@ -1553,6 +1558,8 @@ static void omap_hsmmc_request(struct mmc_host *mmc, struct mmc_request *req)
 			req->data->error = -EBADF;
 		req->cmd->retries = 0;
 		mmc_request_done(mmc, req);
+		pm_runtime_mark_last_busy(host->dev);
+		pm_runtime_put_autosuspend(host->dev);
 		return;
 	} else if (host->reqs_blocked)
 		host->reqs_blocked = 0;
@@ -1566,6 +1573,8 @@ static void omap_hsmmc_request(struct mmc_host *mmc, struct mmc_request *req)
 			req->data->error = err;
 		host->mrq = NULL;
 		mmc_request_done(mmc, req);
+		pm_runtime_mark_last_busy(host->dev);
+		pm_runtime_put_autosuspend(host->dev);
 		return;
 	}
 	if (req->sbc && !(host->flags & AUTO_CMD23)) {
@@ -1778,25 +1787,6 @@ static void omap_hsmmc_conf_bus_power(struct omap_hsmmc_host *host)
 	set_sd_bus_power(host);
 }
 
-static int omap_hsmmc_enable_fclk(struct mmc_host *mmc)
-{
-	struct omap_hsmmc_host *host = mmc_priv(mmc);
-
-	pm_runtime_get_sync(host->dev);
-
-	return 0;
-}
-
-static int omap_hsmmc_disable_fclk(struct mmc_host *mmc)
-{
-	struct omap_hsmmc_host *host = mmc_priv(mmc);
-
-	pm_runtime_mark_last_busy(host->dev);
-	pm_runtime_put_autosuspend(host->dev);
-
-	return 0;
-}
-
 static int omap_hsmmc_multi_io_quirk(struct mmc_card *card,
 				     unsigned int direction, int blk_size)
 {
@@ -1808,8 +1798,6 @@ static int omap_hsmmc_multi_io_quirk(struct mmc_card *card,
 }
 
 static struct mmc_host_ops omap_hsmmc_ops = {
-	.enable = omap_hsmmc_enable_fclk,
-	.disable = omap_hsmmc_disable_fclk,
 	.post_req = omap_hsmmc_post_req,
 	.pre_req = omap_hsmmc_pre_req,
 	.request = omap_hsmmc_request,

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