diff options
| author | Alan Cox <alan@lxorguk.ukuu.org.uk> | 2008-07-25 10:48:17 +0200 |
|---|---|---|
| committer | Linus Torvalds <torvalds@linux-foundation.org> | 2008-07-25 19:53:43 +0200 |
| commit | b8e35919653d76e7dceb8d3b8569c4ec1004d546 (patch) | |
| tree | 39d61f03073d2481bf2a9e708554dde57ef37a14 /drivers/char/ds1302.c | |
| parent | ppdev: wrap ioctl handler in driver and push lock down (diff) | |
| download | linux-b8e35919653d76e7dceb8d3b8569c4ec1004d546.tar.xz linux-b8e35919653d76e7dceb8d3b8569c4ec1004d546.zip | |
ds1302: push down the BKL into the driver ioctl code
Signed-off-by: Alan Cox <alan@redhat.com>
Cc: Jiri Kosina <jkosina@suse.cz>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'drivers/char/ds1302.c')
| -rw-r--r-- | drivers/char/ds1302.c | 17 |
1 files changed, 11 insertions, 6 deletions
diff --git a/drivers/char/ds1302.c b/drivers/char/ds1302.c index fada6ddefbae..c5e67a623951 100644 --- a/drivers/char/ds1302.c +++ b/drivers/char/ds1302.c @@ -20,10 +20,11 @@ #include <linux/miscdevice.h> #include <linux/delay.h> #include <linux/bcd.h> +#include <linux/smp_lock.h> +#include <linux/uaccess.h> +#include <linux/io.h> -#include <asm/uaccess.h> #include <asm/system.h> -#include <asm/io.h> #include <asm/rtc.h> #if defined(CONFIG_M32R) #include <asm/m32r.h> @@ -153,9 +154,7 @@ static unsigned char days_in_mo[] = /* ioctl that supports RTC_RD_TIME and RTC_SET_TIME (read and set time/date). */ -static int -rtc_ioctl(struct inode *inode, struct file *file, unsigned int cmd, - unsigned long arg) +static long rtc_ioctl(struct file *file, unsigned int cmd, unsigned long arg) { unsigned long flags; @@ -165,7 +164,9 @@ rtc_ioctl(struct inode *inode, struct file *file, unsigned int cmd, struct rtc_time rtc_tm; memset(&rtc_tm, 0, sizeof (struct rtc_time)); + lock_kernel(); get_rtc_time(&rtc_tm); + unlock_kernel(); if (copy_to_user((struct rtc_time*)arg, &rtc_tm, sizeof(struct rtc_time))) return -EFAULT; return 0; @@ -217,6 +218,7 @@ rtc_ioctl(struct inode *inode, struct file *file, unsigned int cmd, BIN_TO_BCD(mon); BIN_TO_BCD(yrs); + lock_kernel(); local_irq_save(flags); CMOS_WRITE(yrs, RTC_YEAR); CMOS_WRITE(mon, RTC_MONTH); @@ -225,6 +227,7 @@ rtc_ioctl(struct inode *inode, struct file *file, unsigned int cmd, CMOS_WRITE(min, RTC_MINUTES); CMOS_WRITE(sec, RTC_SECONDS); local_irq_restore(flags); + unlock_kernel(); /* Notice that at this point, the RTC is updated but * the kernel is still running with the old time. @@ -244,8 +247,10 @@ rtc_ioctl(struct inode *inode, struct file *file, unsigned int cmd, if(copy_from_user(&tcs_val, (int*)arg, sizeof(int))) return -EFAULT; + lock_kernel(); tcs_val = RTC_TCR_PATTERN | (tcs_val & 0x0F); ds1302_writereg(RTC_TRICKLECHARGER, tcs_val); + unlock_kernel(); return 0; } default: @@ -282,7 +287,7 @@ get_rtc_status(char *buf) static const struct file_operations rtc_fops = { .owner = THIS_MODULE, - .ioctl = rtc_ioctl, + .unlocked_ioctl = rtc_ioctl, }; /* Probe for the chip by writing something to its RAM and try reading it back. */ |