linux-kernel - Re: nokia

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Message-Id: <201412082310.50742@pali>
Date:	Mon, 8 Dec 2014 23:10:50 +0100
From:	Pali Rohár <pali.rohar@...il.com>
To:	Pavel Machek <pavel@....cz>
Cc:	sre@...ian.org, sre@...g0.de,
	kernel list <linux-kernel@...r.kernel.org>,
	"linux-arm-kernel" <linux-arm-kernel@...ts.infradead.org>,
	linux-omap@...r.kernel.org, tony@...mide.com, khilman@...nel.org,
	aaro.koskinen@....fi, freemangordon@....bg, balbi@...com,
	Greg KH <greg@...ah.com>, marcel@...tmann.org
Subject: Re: nokia_h4p on 3.16+

On Monday 08 December 2014 21:47:35 Pavel Machek wrote:
> Hi!
> 
> It seems commit:
> 
> commit bd5dc09f557547399cd44d0a1224df7ff64e4a6b
> Author: Felipe Balbi <balbi@...com>
> Date:   Wed Apr 23 09:58:28 2014 -0500
> 
>     serial: fix UART_IIR_ID
> 
>     UART IRQ Identification bitfield is 3
>         bits long (bits 3:1) but current mask only
> 	    masks 2 bits. Fix it.
> 
> Signed-off-by: Felipe Balbi <balbi@...com>
> Signed-off-by: Greg Kroah-Hartman <gregkh@...uxfoundation.org>
> 
> breaks bluetooth driver on n900. (drivers/staging/nokia_h4p).
> 
> Pali, you may want to revert the patch.
> 
> That is good news, because reverting it on 3.18-rcX brings h4p
> back, too (and as machine boots on nfsroot, debugging should
> be possible.)
> 
> Best regards,
> 									Pavel

Pavel, maybe there is some unhandled iir value in function
static irqreturn_t hci_h4p_interrupt(int irq, void *data)
which cause that driver is not working?

-- 
Pali Rohár
pali.rohar@...il.com

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