[PATCH] sanitize blkdev_get() and friends

[linux-2.6-omap-h63xx.git] / drivers / char / ds1286.c

diff --git a/drivers/char/ds1286.c b/drivers/char/ds1286.c
index 6d58b037080234431b49f6cacde669998ab749a7..0a826d7be10ee21b85ef5178d3830aac0ef46e9a 100644 (file)
--- a/drivers/char/ds1286.c
+++ b/drivers/char/ds1286.c
@@ -27,6 +27,7 @@
  * option) any later version.
  */
 #include <linux/ds1286.h>
+#include <linux/smp_lock.h>
 #include <linux/types.h>
 #include <linux/errno.h>
 #include <linux/miscdevice.h>
@@ -39,6 +40,7 @@
 #include <linux/spinlock.h>
 #include <linux/bcd.h>
 #include <linux/proc_fs.h>
+#include <linux/jiffies.h>
 
 #include <asm/uaccess.h>
 #include <asm/system.h>
@@ -197,6 +199,7 @@ static int ds1286_ioctl(struct inode *inode, struct file *file,
 
                hrs = alm_tm.tm_hour;
                min = alm_tm.tm_min;
+               sec = alm_tm.tm_sec;
 
                if (hrs >= 24)
                        hrs = 0xff;
@@ -204,9 +207,11 @@ static int ds1286_ioctl(struct inode *inode, struct file *file,
                if (min >= 60)
                        min = 0xff;
 
-               BIN_TO_BCD(sec);
-               BIN_TO_BCD(min);
-               BIN_TO_BCD(hrs);
+               if (sec != 0)
+                       return -EINVAL;
+
+               min = bin2bcd(min);
+               min = bin2bcd(hrs);
 
                spin_lock(&ds1286_lock);
                rtc_write(hrs, RTC_HOURS_ALARM);
@@ -248,6 +253,7 @@ static int ds1286_ioctl(struct inode *inode, struct file *file,
 
 static int ds1286_open(struct inode *inode, struct file *file)
 {
+       lock_kernel();
        spin_lock_irq(&ds1286_lock);
 
        if (ds1286_status & RTC_IS_OPEN)
@@ -256,10 +262,12 @@ static int ds1286_open(struct inode *inode, struct file *file)
        ds1286_status |= RTC_IS_OPEN;
 
        spin_unlock_irq(&ds1286_lock);
+       unlock_kernel();
        return 0;
 
 out_busy:
        spin_lock_irq(&ds1286_lock);
+       unlock_kernel();
        return -EBUSY;
 }
 
@@ -345,7 +353,7 @@ static int ds1286_proc_output(char *buf)
 
        ds1286_get_time(&tm);
        hundredth = rtc_read(RTC_HUNDREDTH_SECOND);
-       BCD_TO_BIN(hundredth);
+       hundredth = bcd2bin(hundredth);
 
        p += sprintf(p,
                     "rtc_time\t: %02d:%02d:%02d.%02d\n"
@@ -435,7 +443,6 @@ static void ds1286_get_time(struct rtc_time *rtc_tm)
 {
        unsigned char save_control;
        unsigned long flags;
-       unsigned long uip_watchdog = jiffies;
 
        /*
         * read RTC once any update in progress is done. The update
@@ -448,8 +455,7 @@ static void ds1286_get_time(struct rtc_time *rtc_tm)
         */
 
        if (ds1286_is_updating() != 0)
-               while (jiffies - uip_watchdog < 2*HZ/100)
-                       barrier();
+               msleep(20);
 
        /*
         * Only the values that we read from the RTC are set. We leave
@@ -471,12 +477,12 @@ static void ds1286_get_time(struct rtc_time *rtc_tm)
        rtc_write(save_control, RTC_CMD);
        spin_unlock_irqrestore(&ds1286_lock, flags);
 
-       BCD_TO_BIN(rtc_tm->tm_sec);
-       BCD_TO_BIN(rtc_tm->tm_min);
-       BCD_TO_BIN(rtc_tm->tm_hour);
-       BCD_TO_BIN(rtc_tm->tm_mday);
-       BCD_TO_BIN(rtc_tm->tm_mon);
-       BCD_TO_BIN(rtc_tm->tm_year);
+       rtc_tm->tm_sec = bcd2bin(rtc_tm->tm_sec);
+       rtc_tm->tm_min = bcd2bin(rtc_tm->tm_min);
+       rtc_tm->tm_hour = bcd2bin(rtc_tm->tm_hour);
+       rtc_tm->tm_mday = bcd2bin(rtc_tm->tm_mday);
+       rtc_tm->tm_mon = bcd2bin(rtc_tm->tm_mon);
+       rtc_tm->tm_year = bcd2bin(rtc_tm->tm_year);
 
        /*
         * Account for differences between how the RTC uses the values
@@ -525,12 +531,12 @@ static int ds1286_set_time(struct rtc_time *rtc_tm)
        if (yrs >= 100)
                yrs -= 100;
 
-       BIN_TO_BCD(sec);
-       BIN_TO_BCD(min);
-       BIN_TO_BCD(hrs);
-       BIN_TO_BCD(day);
-       BIN_TO_BCD(mon);
-       BIN_TO_BCD(yrs);
+       sec = bin2bcd(sec);
+       min = bin2bcd(min);
+       hrs = bin2bcd(hrs);
+       day = bin2bcd(day);
+       mon = bin2bcd(mon);
+       yrs = bin2bcd(yrs);
 
        spin_lock_irqsave(&ds1286_lock, flags);
        save_control = rtc_read(RTC_CMD);
@@ -566,8 +572,8 @@ static void ds1286_get_alm_time(struct rtc_time *alm_tm)
        cmd = rtc_read(RTC_CMD);
        spin_unlock_irqrestore(&ds1286_lock, flags);
 
-       BCD_TO_BIN(alm_tm->tm_min);
-       BCD_TO_BIN(alm_tm->tm_hour);
+       alm_tm->tm_min = bcd2bin(alm_tm->tm_min);
+       alm_tm->tm_hour = bcd2bin(alm_tm->tm_hour);
        alm_tm->tm_sec = 0;
 }