linux-kernel - [PATCH 12/13] mmc: bcm2835: move timeout to thread context

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Date:   Fri, 27 Jan 2017 00:37:25 +0100
From:   Gerd Hoffmann <kraxel@...hat.com>
To:     linux-rpi-kernel@...ts.infradead.org
Cc:     Stefan Wahren <stefan.wahren@...e.com>,
        Eric Anholt <eric@...olt.net>,
        Ulf Hansson <ulf.hansson@...aro.org>,
        linux-mmc@...r.kernel.org, Gerd Hoffmann <kraxel@...hat.com>,
        Florian Fainelli <f.fainelli@...il.com>,
        Ray Jui <rjui@...adcom.com>,
        Scott Branden <sbranden@...adcom.com>,
        bcm-kernel-feedback-list@...adcom.com (maintainer:BROADCOM
        BCM281XX/BCM11XXX/BCM216XX ARM ARCHITE...),
        Stephen Warren <swarren@...dotorg.org>,
        Lee Jones <lee@...nel.org>,
        linux-arm-kernel@...ts.infradead.org (moderated list:BROADCOM BCM2835
        ARM ARCHITECTURE), linux-kernel@...r.kernel.org (open list)
Subject: [PATCH 12/13] mmc: bcm2835: move timeout to thread context

Signed-off-by: Gerd Hoffmann <kraxel@...hat.com>
---
 drivers/mmc/host/bcm2835.c | 22 +++++++++++-----------
 1 file changed, 11 insertions(+), 11 deletions(-)

diff --git a/drivers/mmc/host/bcm2835.c b/drivers/mmc/host/bcm2835.c
index fc2d02f..82caddc 100644
--- a/drivers/mmc/host/bcm2835.c
+++ b/drivers/mmc/host/bcm2835.c
@@ -147,7 +147,7 @@ struct bcm2835_host {
 	u32			pio_timeout;	/* In jiffies */
 	int			clock;		/* Current clock speed */
 	unsigned int		max_clk;	/* Max possible freq */
-	struct timer_list	timer;		/* Timer for timeouts */
+	struct delayed_work     timeout_work;   /* Timer for timeouts */
 	struct sg_mapping_iter	sg_miter;	/* SG state for PIO */
 	unsigned int		blocks;		/* remaining PIO blocks */
 	int			irq;		/* Device IRQ */
@@ -669,12 +669,11 @@ bool bcm2835_send_command(struct bcm2835_host *host,
 		return false;
 	}
 
-	timeout = jiffies;
 	if (!cmd->data && cmd->busy_timeout > 9000)
-		timeout += DIV_ROUND_UP(cmd->busy_timeout, 1000) * HZ + HZ;
+		timeout = DIV_ROUND_UP(cmd->busy_timeout, 1000) * HZ + HZ;
 	else
-		timeout += 10 * HZ;
-	mod_timer(&host->timer, timeout);
+		timeout = 10 * HZ;
+	schedule_delayed_work(&host->timeout_work, timeout);
 
 	host->cmd = cmd;
 
@@ -912,9 +911,11 @@ static void bcm2835_finish_command(struct bcm2835_host *host)
 	}
 }
 
-static void bcm2835_timeout(unsigned long data)
+static void bcm2835_timeout(struct work_struct *work)
 {
-	struct bcm2835_host *host = (struct bcm2835_host *)data;
+	struct delayed_work *d = to_delayed_work(work);
+	struct bcm2835_host *host =
+		container_of(d, struct bcm2835_host, timeout_work);
 	struct device *dev = &host->pdev->dev;
 
 	mutex_lock(&host->mutex);
@@ -1303,7 +1304,7 @@ static void bcm2835_finish_request(struct bcm2835_host *host)
 	struct dma_chan *terminate_chan = NULL;
 	struct mmc_request *mrq;
 
-	del_timer(&host->timer);
+	cancel_delayed_work(&host->timeout_work);
 
 	mrq = host->mrq;
 
@@ -1387,8 +1388,7 @@ int bcm2835_add_host(struct bcm2835_host *host)
 	/* report supported voltage ranges */
 	mmc->ocr_avail = MMC_VDD_32_33 | MMC_VDD_33_34;
 
-	setup_timer(&host->timer, bcm2835_timeout,
-		    (unsigned long)host);
+	INIT_DELAYED_WORK(&host->timeout_work, bcm2835_timeout);
 
 	/* Set interrupt enables */
 	host->hcfg = SDHCFG_BUSY_IRPT_EN;
@@ -1523,7 +1523,7 @@ static int bcm2835_remove(struct platform_device *pdev)
 
 	free_irq(host->irq, host);
 
-	del_timer_sync(&host->timer);
+	cancel_delayed_work_sync(&host->timeout_work);
 
 	mmc_free_host(host->mmc);
 	platform_set_drvdata(pdev, NULL);
-- 
1.8.3.1