From: Arnd Bergmann <a...@arndb.de>
Date: Thu, 24 Nov 2016 17:26:22 +0100
> irda_get_mtt() returns a hardcoded '10000' in some cases,
> and with gcc-7, we get a build error because this triggers a
> compile-time check in udelay():
>
> drivers/net/irda/w83977af_ir.o: In function `w83977af_hard_xmit':
> w83977af_ir.c:(.text.w83977af_hard_xmit+0x14c): undefined reference to
> `__bad_udelay'
>
> Older compilers did not run into this because they either did not
> completely inline the irda_get_mtt() or did not consider the
> 10000 value a constant expression.
>
> The code has been wrong since the start of git history.
>
> Signed-off-by: Arnd Bergmann <a...@arndb.de>
...
> @@ -518,7 +518,9 @@ static netdev_tx_t w83977af_hard_xmit(struct sk_buff *skb,
>
> mtt = irda_get_mtt(skb);
> pr_debug("%s(%ld), mtt=%d\n", __func__ , jiffies, mtt);
> - if (mtt)
> + if (mtt > 1000)
> + mdelay(mtt/1000);
> + else if (mtt)
> udelay(mtt);
I know this isn't caused by you, but wow what is going on with the
indentation here?!?!?
