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@xxxxxxxxxxxxxxx> know about it.
>From 5cac1f67ea0363d463a58ec2d9118268fe2ba5d6 Mon Sep 17 00:00:00 2001
From: Heiner Kallweit <hkallweit1@xxxxxxxxx>
Date: Thu, 7 Jul 2016 03:17:39 -0300
Subject: [media] rc: nuvoton: fix hang if chip is configured for alternative EFM IO address
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From: Heiner Kallweit <hkallweit1@xxxxxxxxx>
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@xxxxxxxxx>
Signed-off-by: Heiner Kallweit <hkallweit1@xxxxxxxxx>
Tested-by: Antti Seppälä <a.seppala@xxxxxxxxx>
Signed-off-by: Mauro Carvalho Chehab <mchehab@xxxxxxxxxxxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
---
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@xxxxxxxxx are
queue-4.7/rc-nuvoton-fix-hang-if-chip-is-configured-for-alternative-efm-io-address.patch
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