Fix issue where the data register may be overwritten by next character
reception before being read and returned.
Signed-off-by: Olivier Hériveaux <olivier.herive...@ledger.fr>
---
hw/char/stm32f2xx_usart.c | 3 ++-
1 file changed, 2 insertions(+), 1 deletion(-)
diff --git a/hw/char/stm32f2xx_usart.c b/hw/char/stm32f2xx_usart.c
index 8df0832424..fde67f4f03 100644
--- a/hw/char/stm32f2xx_usart.c
+++ b/hw/char/stm32f2xx_usart.c
@@ -103,10 +103,11 @@ static uint64_t stm32f2xx_usart_read(void *opaque, hwaddr
addr,
return retvalue;
case USART_DR:
DB_PRINT("Value: 0x%" PRIx32 ", %c\n", s->usart_dr, (char)
s->usart_dr);
+ retvalue = s->usart_dr & 0x3FF;
s->usart_sr &= ~USART_SR_RXNE;
qemu_chr_fe_accept_input(&s->chr);
qemu_set_irq(s->irq, 0);
- return s->usart_dr & 0x3FF;
+ return retvalue;
case USART_BRR:
return s->usart_brr;
case USART_CR1:
--
2.17.1
--
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