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platform_kernel-5.15
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[PATCH] i2c: convert m41t00 to use a workqueue 

The m41t00 i2c/rtc driver currently uses a tasklet to schedule
interrupt-level writes to the rtc.  This patch causes the driver
to use a workqueue instead.

Signed-off-by: Mark A. Greer <mgreer@mvista.com>
Signed-off-by: Jean Delvare <khali@linux-fr.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
This commit is contained in:
Mark A. Greer 2006-03-31 23:06:03 +02:00 committed by Greg Kroah-Hartman
parent 524465df2a
commit 8c750c0bd2
1 changed files with 9 additions and 7 deletions
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14
drivers/i2c/chips/m41t00.c
View File

@ -25,6 +25,7 @@
#include <linux/rtc.h> #include <linux/rtc.h>
#include <linux/bcd.h> #include <linux/bcd.h>
#include <linux/mutex.h> #include <linux/mutex.h>
#include <linux/workqueue.h>
#include <asm/time.h> #include <asm/time.h>
#include <asm/rtc.h> #include <asm/rtc.h>
@ -111,7 +112,7 @@ m41t00_get_rtc_time(void)
} }
static void static void
m41t00_set_tlet(ulong arg) m41t00_set(void *arg)
{ {
struct rtc_time tm; struct rtc_time tm;
ulong nowtime = *(ulong *)arg; ulong nowtime = *(ulong *)arg;
@ -146,8 +147,8 @@ m41t00_set_tlet(ulong arg)
} }
static ulong new_time; static ulong new_time;
static struct workqueue_struct *m41t00_wq;
DECLARE_TASKLET_DISABLED(m41t00_tasklet, m41t00_set_tlet, (ulong)&new_time); static DECLARE_WORK(m41t00_work, m41t00_set, &new_time);
int int
m41t00_set_rtc_time(ulong nowtime) m41t00_set_rtc_time(ulong nowtime)
@ -155,9 +156,9 @@ m41t00_set_rtc_time(ulong nowtime)
new_time = nowtime; new_time = nowtime;
if (in_interrupt()) if (in_interrupt())
tasklet_schedule(&m41t00_tasklet); queue_work(m41t00_wq, &m41t00_work);
else else
m41t00_set_tlet((ulong)&new_time); m41t00_set(&new_time);
return 0; return 0;
} }
@ -189,6 +190,7 @@ m41t00_probe(struct i2c_adapter *adap, int addr, int kind)
return rc; return rc;
} }
m41t00_wq = create_singlethread_workqueue("m41t00");
save_client = client; save_client = client;
return 0; return 0;
} }
@ -206,7 +208,7 @@ m41t00_detach(struct i2c_client *client)
if ((rc = i2c_detach_client(client)) == 0) { if ((rc = i2c_detach_client(client)) == 0) {
kfree(client); kfree(client);
tasklet_kill(&m41t00_tasklet); destroy_workqueue(m41t00_wq);
} }
return rc; return rc;
} }