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[DeviceDriver] Fix can infinite loop when can driver send error 

- in _can_int_tx if can driver sendmsg do not return RT_EOK,
   it will repeat until sendmsg return RT_EOK
 - if error occur on can bus(wire broken or EMI), all threads that
   have lower priority will not be executed
 - we should let application layer to determine if resend is appropriate
   when send fail, besides in data link layer, can already implemented
   auto resend in hardware
This commit is contained in:
gbcwbz 2022-05-09 21:06:23 +08:00 committed by Man, Jianting (Meco)
parent 666af5e29d
commit 84fe80fbf9
1 changed files with 3 additions and 2 deletions
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5
components/drivers/can/can.c
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@ -158,10 +158,10 @@ rt_inline int _can_int_tx(struct rt_can_device *can, const struct rt_can_msg *da
{
/* send failed. */
level = rt_hw_interrupt_disable();
rt_list_insert_after(&tx_fifo->freelist, &tx_tosnd->list);
rt_list_insert_before(&tx_fifo->freelist, &tx_tosnd->list);
rt_hw_interrupt_enable(level);
rt_sem_release(&(tx_fifo->sem));
continue;
goto err_ret;
}
can->status.sndchange = 1;
@ -189,6 +189,7 @@ rt_inline int _can_int_tx(struct rt_can_device *can, const struct rt_can_msg *da
}
else
{
err_ret:
level = rt_hw_interrupt_disable();
can->status.dropedsndpkg++;
rt_hw_interrupt_enable(level);