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

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Message-ID: <20171024101853.GA69439@beast>
Date:   Tue, 24 Oct 2017 03:18:53 -0700
From:   Kees Cook <keescook@...omium.org>
To:     Michael Ellerman <mpe@...erman.id.au>
Cc:     Benjamin Herrenschmidt <benh@...nel.crashing.org>,
        linux-kernel@...r.kernel.org, linuxppc-dev@...ts.ozlabs.org
Subject: [PATCH] drivers/macintosh: 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: Benjamin Herrenschmidt <benh@...nel.crashing.org>
Cc: linuxppc-dev@...ts.ozlabs.org
Signed-off-by: Kees Cook <keescook@...omium.org>
---
 drivers/macintosh/smu.c | 10 ++++------
 1 file changed, 4 insertions(+), 6 deletions(-)

diff --git a/drivers/macintosh/smu.c b/drivers/macintosh/smu.c
index ea9bdc85a21d..899ec1f4c833 100644
--- a/drivers/macintosh/smu.c
+++ b/drivers/macintosh/smu.c
@@ -103,7 +103,7 @@ static DEFINE_MUTEX(smu_part_access);
 static int smu_irq_inited;
 static unsigned long smu_cmdbuf_abs;
 
-static void smu_i2c_retry(unsigned long data);
+static void smu_i2c_retry(struct timer_list *t);
 
 /*
  * SMU driver low level stuff
@@ -582,9 +582,7 @@ static int smu_late_init(void)
 	if (!smu)
 		return 0;
 
-	init_timer(&smu->i2c_timer);
-	smu->i2c_timer.function = smu_i2c_retry;
-	smu->i2c_timer.data = (unsigned long)smu;
+	timer_setup(&smu->i2c_timer, smu_i2c_retry, 0);
 
 	if (smu->db_node) {
 		smu->db_irq = irq_of_parse_and_map(smu->db_node, 0);
@@ -755,7 +753,7 @@ static void smu_i2c_complete_command(struct smu_i2c_cmd *cmd, int fail)
 }
 
 
-static void smu_i2c_retry(unsigned long data)
+static void smu_i2c_retry(struct timer_list *unused)
 {
 	struct smu_i2c_cmd	*cmd = smu->cmd_i2c_cur;
 
@@ -795,7 +793,7 @@ static void smu_i2c_low_completion(struct smu_cmd *scmd, void *misc)
 		BUG_ON(cmd != smu->cmd_i2c_cur);
 		if (!smu_irq_inited) {
 			mdelay(5);
-			smu_i2c_retry(0);
+			smu_i2c_retry(NULL);
 			return;
 		}
 		mod_timer(&smu->i2c_timer, jiffies + msecs_to_jiffies(5));
-- 
2.7.4


-- 
Kees Cook
Pixel Security