linux-kernel - [PATCH] pcmcia/electra_cf: Convert timers to use timer

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Message-ID: <20171005005052.GA23318@beast>
Date:   Wed, 4 Oct 2017 17:50:52 -0700
From:   Kees Cook <keescook@...omium.org>
To:     linux-kernel@...r.kernel.org
Cc:     Michael Ellerman <mpe@...erman.id.au>,
        linux-pcmcia@...ts.infradead.org,
        Thomas Gleixner <tglx@...utronix.de>
Subject: [PATCH] pcmcia/electra_cf: 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: Michael Ellerman <mpe@...erman.id.au>
Cc: linux-pcmcia@...ts.infradead.org
Cc: Thomas Gleixner <tglx@...utronix.de>
Signed-off-by: Kees Cook <keescook@...omium.org>
---
This requires commit 686fef928bba ("timer: Prepare to change timer
callback argument type") in v4.14-rc3, but should be otherwise
stand-alone.
---
 drivers/pcmcia/electra_cf.c | 12 +++++++-----
 1 file changed, 7 insertions(+), 5 deletions(-)

diff --git a/drivers/pcmcia/electra_cf.c b/drivers/pcmcia/electra_cf.c
index c6fe2a4a7a6a..9671ded549f0 100644
--- a/drivers/pcmcia/electra_cf.c
+++ b/drivers/pcmcia/electra_cf.c
@@ -79,9 +79,9 @@ static int electra_cf_ss_init(struct pcmcia_socket *s)
 }
 
 /* the timer is primarily to kick this socket's pccardd */
-static void electra_cf_timer(unsigned long _cf)
+static void electra_cf_timer(struct timer_list *t)
 {
-	struct electra_cf_socket *cf = (void *) _cf;
+	struct electra_cf_socket *cf = from_timer(cf, t, timer);
 	int present = electra_cf_present(cf);
 
 	if (present != cf->present) {
@@ -95,7 +95,9 @@ static void electra_cf_timer(unsigned long _cf)
 
 static irqreturn_t electra_cf_irq(int irq, void *_cf)
 {
-	electra_cf_timer((unsigned long)_cf);
+	struct electra_cf_socket *cf = _cf;
+
+	electra_cf_timer(&cf->timer);
 	return IRQ_HANDLED;
 }
 
@@ -206,7 +208,7 @@ static int electra_cf_probe(struct platform_device *ofdev)
 	if (!cf)
 		return -ENOMEM;
 
-	setup_timer(&cf->timer, electra_cf_timer, (unsigned long)cf);
+	timer_setup(&cf->timer, electra_cf_timer, 0);
 	cf->irq = 0;
 
 	cf->ofdev = ofdev;
@@ -305,7 +307,7 @@ static int electra_cf_probe(struct platform_device *ofdev)
 		 cf->mem_phys, io.start, cf->irq);
 
 	cf->active = 1;
-	electra_cf_timer((unsigned long)cf);
+	electra_cf_timer(&cf->timer);
 	return 0;
 
 fail3:
-- 
2.7.4


-- 
Kees Cook
Pixel Security