Re: [PATCH] video: mxsfb: Make sure axi clock is enabled when accessing registers

On Tue, Mar 03, 2015 at 10:08:17PM -0800, Greg KH wrote:

On Wed, Mar 04, 2015 at 01:58:55PM +0800, Liu Ying wrote:

quoted

The LCDIF engines embedded in i.MX6sl and i.MX6sx SoCs need the axi clock
as the engine's system clock.  The clock should be enabled when accessing
LCDIF registers, otherwise the kernel would hang up.  We should also keep
the clock being enabled when the engine is being active to scan out frames
from memory.  This patch makes sure the axi clock is enabled when accessing
registers so that the kernel hang up issue can be fixed.

Reported-by: Peter Chen <redacted>
Signed-off-by: Liu Ying <redacted>
---
 drivers/video/fbdev/mxsfb.c | 70 ++++++++++++++++++++++++++++++++++++---------
 1 file changed, 56 insertions(+), 14 deletions(-)

<formletter>

This is not the correct way to submit patches for inclusion in the
stable kernel tree.  Please read Documentation/stable_kernel_rules.txt
for how to do this properly.

</formletter>

Hi Greg,

I find this system hang issue at v4.0, and it should exist at v3.19 too.
Do you mean Ying forget to add tag "Cc: stable@vger.kernel.org # 3.19"
at commit log or you think this fix is too large?

-- 

Best Regards,
Peter Chen