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Fixed bug 3530043. 

git-svn-id: svn://svn.code.sf.net/p/chibios/svn/trunk@4244 35acf78f-673a-0410-8e92-d51de3d6d3f4
master
gdisirio 2012-05-27 14:50:05 +00:00
parent 2b01d72e42
commit c0cbc2411e
3 changed files with 23 additions and 21 deletions
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34
os/hal/platforms/STM32/i2c_lld.c
View File

@ -165,13 +165,15 @@ static void i2c_lld_abort_operation(I2CDriver *i2cp) {
static void i2c_lld_safety_timeout(void *p) {
I2CDriver *i2cp = (I2CDriver *)p;
if (i2cp->thread) {
i2c_lld_abort_operation(i2cp);
chSysLockFromIsr();
i2cp->thread->p_u.rdymsg = RDY_TIMEOUT;
chSchReadyI(i2cp->thread);
chSysUnlockFromIsr();
if (i2cp->thread) {
Thread *tp = i2cp->thread;
i2c_lld_abort_operation(i2cp);
i2cp->thread = NULL;
tp->p_u.rdymsg = RDY_TIMEOUT;
chSchReadyI(tp);
}
chSysUnlockFromIsr();
}
/**
@ -768,11 +770,11 @@ msg_t i2c_lld_master_receive_timeout(I2CDriver *i2cp, i2caddr_t addr,
systime_t timeout) {
I2C_TypeDef *dp = i2cp->i2c;
VirtualTimer vt;
msg_t rdymsg;
chDbgCheck((rxbytes > 1), "i2c_lld_master_receive_timeout");
/* Global timeout for the whole operation.*/
if (timeout != TIME_INFINITE)
chVTSetI(&vt, timeout, i2c_lld_safety_timeout, (void *)i2cp);
/* Releases the lock from high level driver.*/
@ -789,10 +791,10 @@ msg_t i2c_lld_master_receive_timeout(I2CDriver *i2cp, i2caddr_t addr,
/* Waits until BUSY flag is reset and the STOP from the previous operation
is completed, alternatively for a timeout condition.*/
while ((dp->SR2 & I2C_SR2_BUSY) || (dp->CR1 & I2C_CR1_STOP)) {
if (!chVTIsArmedI(&vt)) {
chSysLock();
if (!chVTIsArmedI(&vt))
return RDY_TIMEOUT;
}
chSysUnlock();
}
/* This lock will be released in high level driver.*/
@ -810,11 +812,10 @@ msg_t i2c_lld_master_receive_timeout(I2CDriver *i2cp, i2caddr_t addr,
/* Waits for the operation completion or a timeout.*/
i2cp->thread = chThdSelf();
chSchGoSleepS(THD_STATE_SUSPENDED);
rdymsg = chThdSelf()->p_u.rdymsg;
if (rdymsg != RDY_TIMEOUT)
if (chVTIsArmedI(&vt))
chVTResetI(&vt);
return rdymsg;
return chThdSelf()->p_u.rdymsg;
}
/**
@ -848,12 +849,12 @@ msg_t i2c_lld_master_transmit_timeout(I2CDriver *i2cp, i2caddr_t addr,
systime_t timeout) {
I2C_TypeDef *dp = i2cp->i2c;
VirtualTimer vt;
msg_t rdymsg;
chDbgCheck(((rxbytes == 0) || ((rxbytes > 1) && (rxbuf != NULL))),
"i2c_lld_master_transmit_timeout");
/* Global timeout for the whole operation.*/
if (timeout != TIME_INFINITE)
chVTSetI(&vt, timeout, i2c_lld_safety_timeout, (void *)i2cp);
/* Releases the lock from high level driver.*/
@ -874,10 +875,10 @@ msg_t i2c_lld_master_transmit_timeout(I2CDriver *i2cp, i2caddr_t addr,
/* Waits until BUSY flag is reset and the STOP from the previous operation
is completed, alternatively for a timeout condition.*/
while ((dp->SR2 & I2C_SR2_BUSY) || (dp->CR1 & I2C_CR1_STOP)) {
if (!chVTIsArmedI(&vt)) {
chSysLock();
if (!chVTIsArmedI(&vt))
return RDY_TIMEOUT;
}
chSysUnlock();
}
/* This lock will be released in high level driver.*/
@ -895,11 +896,10 @@ msg_t i2c_lld_master_transmit_timeout(I2CDriver *i2cp, i2caddr_t addr,
/* Waits for the operation completion or a timeout.*/
i2cp->thread = chThdSelf();
chSchGoSleepS(THD_STATE_SUSPENDED);
rdymsg = chThdSelf()->p_u.rdymsg;
if (rdymsg != RDY_TIMEOUT)
if (chVTIsArmedI(&vt))
chVTResetI(&vt);
return rdymsg;
return chThdSelf()->p_u.rdymsg;
}
#endif /* HAL_USE_I2C */

2
readme.txt
View File

@ -81,6 +81,8 @@
*****************************************************************************
*** 2.5.0 ***
- FIX: Fixed timeout related race condition in STM32 I2C driver (bug 3530043)
(backported to 2.4.2).
- FIX: Fixed wrong macro check in STM32 MAC driver (bug 3527179)(backported
to 2.4.2).
- FIX: Fixed error in STM32L-Discovery board.h file (bug 3526918)(backported