It is a patch that adds error processing.
Hanging up by an infinite loop is evaded.
Please apply.
Signed-off-by: kogiidena <[email protected]>
---
diff -urpN OLD/drivers/rtc/rtc-rs5c313.c NEW/drivers/rtc/rtc-rs5c313.c
--- OLD/drivers/rtc/rtc-rs5c313.c 2007-05-08 19:52:11.000000000 +0900
+++ NEW/drivers/rtc/rtc-rs5c313.c 2007-05-08 19:59:15.000000000 +0900
@@ -212,7 +212,9 @@ static inline void rs5c313_write_intintv
static int rs5c313_rtc_read_time(struct device *dev, struct rtc_time *tm)
{
int data;
+ int cnt;
+ cnt = 0;
while (1) {
RS5C313_CEENABLE; /* CE:H */
@@ -225,6 +227,10 @@ static int rs5c313_rtc_read_time(struct
RS5C313_CEDISABLE;
ndelay(700); /* CE:L */
+ if (cnt++ > 100) {
+ dev_err(dev, "%s: timeout error\n", __FUNCTION__);
+ return -EIO;
+ }
}
data = rs5c313_read_reg(RS5C313_ADDR_SEC);
@@ -266,7 +272,9 @@ static int rs5c313_rtc_read_time(struct
static int rs5c313_rtc_set_time(struct device *dev, struct rtc_time *tm)
{
int data;
+ int cnt;
+ cnt = 0;
/* busy check. */
while (1) {
RS5C313_CEENABLE; /* CE:H */
@@ -279,6 +287,11 @@ static int rs5c313_rtc_set_time(struct d
RS5C313_MISCOP;
RS5C313_CEDISABLE;
ndelay(700); /* CE:L */
+
+ if (cnt++ > 100) {
+ dev_err(dev, "%s: timeout error\n", __FUNCTION__);
+ return -EIO;
+ }
}
data = BIN2BCD(tm->tm_sec);
@@ -317,6 +330,7 @@ static int rs5c313_rtc_set_time(struct d
static void rs5c313_check_xstp_bit(void)
{
struct rtc_time tm;
+ int cnt;
RS5C313_CEENABLE; /* CE:H */
if (rs5c313_read_cntreg() & RS5C313_CNTREG_WTEN_XSTP) {
@@ -326,8 +340,11 @@ static void rs5c313_check_xstp_bit(void)
rs5c313_write_cntreg(0x07);
/* busy check. */
- while (rs5c313_read_cntreg() & RS5C313_CNTREG_ADJ_BSY)
+ for (cnt = 0; cnt < 100; cnt++) {
+ if (!(rs5c313_read_cntreg() & RS5C313_CNTREG_ADJ_BSY))
+ break;
RS5C313_MISCOP;
+ }
memset(&tm, 0, sizeof(struct rtc_time));
tm.tm_mday = 1;
-
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