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serial: fix cu crash caused by ioctl is NULL

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Signed-off-by: ligd <liguiding1@xiaomi.com>
This commit is contained in:
ligd 2022-02-07 10:45:18 +08:00 committed by Xiang Xiao
parent 5749ea6604
commit 0155e910dc
1 changed files with 5 additions and 1 deletions
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6
drivers/serial/serial.c
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@ -1280,7 +1280,7 @@ static int uart_ioctl(FAR struct file *filep, int cmd, unsigned long arg)
/* Let low-level driver handle the call first */
int ret = dev->ops->ioctl(filep, cmd, arg);
int ret = dev->ops->ioctl ? dev->ops->ioctl(filep, cmd, arg) : -ENOTTY;
/* The device ioctl() handler returns -ENOTTY when it doesn't know
* how to handle the command. Check if we can handle it here.
@ -1458,6 +1458,8 @@ static int uart_ioctl(FAR struct file *filep, int cmd, unsigned long arg)
termiosp->c_iflag = dev->tc_iflag;
termiosp->c_oflag = dev->tc_oflag;
termiosp->c_lflag = dev->tc_lflag;
ret = 0;
}
break;
@ -1476,6 +1478,8 @@ static int uart_ioctl(FAR struct file *filep, int cmd, unsigned long arg)
dev->tc_iflag = termiosp->c_iflag;
dev->tc_oflag = termiosp->c_oflag;
dev->tc_lflag = termiosp->c_lflag;
ret = 0;
}
break;
}