Patch "[media] rc: nuvoton: fix hang if chip is configured for alternative EFM IO address" has been added to the 4.7-stable tree

Patch "[media] rc: nuvoton: fix hang if chip is configured for alternative EFM IO address" has been added to the 4.7-stable tree

[gregkh]

This is a note to let you know that I've just added the patch titled

    [media] rc: nuvoton: fix hang if chip is configured for alternative EFM IO address

to the 4.7-stable tree which can be found at:
    http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary

The filename of the patch is:
     rc-nuvoton-fix-hang-if-chip-is-configured-for-alternative-efm-io-address.patch
and it can be found in the queue-4.7 subdirectory.

If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@vger.kernel.org> know about it.


>From 5cac1f67ea0363d463a58ec2d9118268fe2ba5d6 Mon Sep 17 00:00:00 2001
From: Heiner Kallweit <hkallweit1@gmail.com>
Date: Thu, 7 Jul 2016 03:17:39 -0300
Subject: [media] rc: nuvoton: fix hang if chip is configured for alternative EFM IO address
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit

From: Heiner Kallweit <hkallweit1@gmail.com>

commit 5cac1f67ea0363d463a58ec2d9118268fe2ba5d6 upstream.

If a system configures the Nuvoton chip to use the alternative
EFM IO address (CR_EFIR2) then after probing the primary EFM IO
address (CR_EFIR) this region is not released.

If a driver for another function of the Nuvoton Super I/O
chip uses the same probing mechanism then it will hang if
loaded after the nuvoton-cir driver.
This was reported for the nct6775 hwmon driver.

Fix this by properly releasing the region after probing CR_EFIR.
This regression was introduced with kernel 4.6 so cc it to stable.

Reported-by: Antti Seppälä <a.seppala@gmail.com>
Signed-off-by: Heiner Kallweit <hkallweit1@gmail.com>
Tested-by: Antti Seppälä <a.seppala@gmail.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@s-opensource.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

---
 drivers/media/rc/nuvoton-cir.c |    1 +
 1 file changed, 1 insertion(+)

--- a/drivers/media/rc/nuvoton-cir.c
+++ b/drivers/media/rc/nuvoton-cir.c
@@ -401,6 +401,7 @@ static int nvt_hw_detect(struct nvt_dev
 	/* Check if we're wired for the alternate EFER setup */
 	nvt->chip_major = nvt_cr_read(nvt, CR_CHIP_ID_HI);
 	if (nvt->chip_major == 0xff) {
+		nvt_efm_disable(nvt);
 		nvt->cr_efir = CR_EFIR2;
 		nvt->cr_efdr = CR_EFDR2;
 		nvt_efm_enable(nvt);


Patches currently in stable-queue which might be from hkallweit1@gmail.com are

queue-4.7/rc-nuvoton-fix-hang-if-chip-is-configured-for-alternative-efm-io-address.patch