linux-kernel - [PATCH] drivers/memstick: Convert timers to use timer

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Date:   Tue, 24 Oct 2017 03:17:35 -0700
From:   Kees Cook <keescook@...omium.org>
To:     Jens Axboe <axboe@...nel.dk>
Cc:     Maxim Levitsky <maximlevitsky@...il.com>,
        Alex Dubov <oakad@...oo.com>, linux-kernel@...r.kernel.org
Subject: [PATCH] drivers/memstick: Convert timers to use timer_setup()

In preparation for unconditionally passing the struct timer_list pointer to
all timer callbacks, switch to using the new timer_setup() and from_timer()
to pass the timer pointer explicitly.

Cc: Maxim Levitsky <maximlevitsky@...il.com>
Cc: Alex Dubov <oakad@...oo.com>
Signed-off-by: Kees Cook <keescook@...omium.org>
---
 drivers/memstick/host/jmb38x_ms.c | 10 ++++++----
 drivers/memstick/host/r592.c      |  7 +++----
 drivers/memstick/host/tifm_ms.c   |  6 +++---
 3 files changed, 12 insertions(+), 11 deletions(-)

diff --git a/drivers/memstick/host/jmb38x_ms.c b/drivers/memstick/host/jmb38x_ms.c
index 48db922075e2..bcdca9fbef51 100644
--- a/drivers/memstick/host/jmb38x_ms.c
+++ b/drivers/memstick/host/jmb38x_ms.c
@@ -59,6 +59,7 @@ struct jmb38x_ms_host {
 	unsigned int            block_pos;
 	unsigned long           timeout_jiffies;
 	struct timer_list       timer;
+	struct memstick_host	*msh;
 	struct memstick_request *req;
 	unsigned char           cmd_flags;
 	unsigned char           io_pos;
@@ -592,10 +593,10 @@ static irqreturn_t jmb38x_ms_isr(int irq, void *dev_id)
 	return IRQ_HANDLED;
 }
 
-static void jmb38x_ms_abort(unsigned long data)
+static void jmb38x_ms_abort(struct timer_list *t)
 {
-	struct memstick_host *msh = (struct memstick_host *)data;
-	struct jmb38x_ms_host *host = memstick_priv(msh);
+	struct jmb38x_ms_host *host = from_timer(host, t, timer);
+	struct memstick_host *msh = host->msh;
 	unsigned long flags;
 
 	dev_dbg(&host->chip->pdev->dev, "abort\n");
@@ -878,6 +879,7 @@ static struct memstick_host *jmb38x_ms_alloc_host(struct jmb38x_ms *jm, int cnt)
 		return NULL;
 
 	host = memstick_priv(msh);
+	host->msh = msh;
 	host->chip = jm;
 	host->addr = ioremap(pci_resource_start(jm->pdev, cnt),
 			     pci_resource_len(jm->pdev, cnt));
@@ -897,7 +899,7 @@ static struct memstick_host *jmb38x_ms_alloc_host(struct jmb38x_ms *jm, int cnt)
 
 	msh->caps = MEMSTICK_CAP_PAR4 | MEMSTICK_CAP_PAR8;
 
-	setup_timer(&host->timer, jmb38x_ms_abort, (unsigned long)msh);
+	timer_setup(&host->timer, jmb38x_ms_abort, 0);
 
 	if (!request_irq(host->irq, jmb38x_ms_isr, IRQF_SHARED, host->host_id,
 			 msh))
diff --git a/drivers/memstick/host/r592.c b/drivers/memstick/host/r592.c
index d5cfb503b9d6..627d6e62fe31 100644
--- a/drivers/memstick/host/r592.c
+++ b/drivers/memstick/host/r592.c
@@ -616,9 +616,9 @@ static void r592_update_card_detect(struct r592_device *dev)
 }
 
 /* Timer routine that fires 1 second after last card detection event, */
-static void r592_detect_timer(long unsigned int data)
+static void r592_detect_timer(struct timer_list *t)
 {
-	struct r592_device *dev = (struct r592_device *)data;
+	struct r592_device *dev = from_timer(dev, t, detect_timer);
 	r592_update_card_detect(dev);
 	memstick_detect_change(dev->host);
 }
@@ -770,8 +770,7 @@ static int r592_probe(struct pci_dev *pdev, const struct pci_device_id *id)
 	spin_lock_init(&dev->io_thread_lock);
 	init_completion(&dev->dma_done);
 	INIT_KFIFO(dev->pio_fifo);
-	setup_timer(&dev->detect_timer,
-		r592_detect_timer, (long unsigned int)dev);
+	timer_setup(&dev->detect_timer, r592_detect_timer, 0);
 
 	/* Host initialization */
 	host->caps = MEMSTICK_CAP_PAR4;
diff --git a/drivers/memstick/host/tifm_ms.c b/drivers/memstick/host/tifm_ms.c
index 7bafa72f8f57..bed205849d02 100644
--- a/drivers/memstick/host/tifm_ms.c
+++ b/drivers/memstick/host/tifm_ms.c
@@ -538,9 +538,9 @@ static int tifm_ms_set_param(struct memstick_host *msh,
 	return 0;
 }
 
-static void tifm_ms_abort(unsigned long data)
+static void tifm_ms_abort(struct timer_list *t)
 {
-	struct tifm_ms *host = (struct tifm_ms *)data;
+	struct tifm_ms *host = from_timer(host, t, timer);
 
 	dev_dbg(&host->dev->dev, "status %x\n",
 		readl(host->dev->addr + SOCK_MS_STATUS));
@@ -575,7 +575,7 @@ static int tifm_ms_probe(struct tifm_dev *sock)
 	host->dev = sock;
 	host->timeout_jiffies = msecs_to_jiffies(1000);
 
-	setup_timer(&host->timer, tifm_ms_abort, (unsigned long)host);
+	timer_setup(&host->timer, tifm_ms_abort, 0);
 	tasklet_init(&host->notify, tifm_ms_req_tasklet, (unsigned long)msh);
 
 	msh->request = tifm_ms_submit_req;
-- 
2.7.4


-- 
Kees Cook
Pixel Security