This is a note to let you know that I've just added the patch titled
s5p-mfc: Set device name for reserved memory region devs
to the 4.4-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:
s5p-mfc-set-device-name-for-reserved-memory-region-devs.patch
and it can be found in the queue-4.4 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.
>From 29debab0a94035a390801d1f177d171d014b7765 Mon Sep 17 00:00:00 2001
From: Javier Martinez Canillas <javier@xxxxxxxxxxxxxxx>
Date: Tue, 3 May 2016 16:27:16 -0400
Subject: s5p-mfc: Set device name for reserved memory region devs
From: Javier Martinez Canillas <javier@xxxxxxxxxxxxxxx>
commit 29debab0a94035a390801d1f177d171d014b7765 upstream.
The devices don't have a name set, so makes dev_name() returns NULL which
makes harder to identify the devices that are causing issues, for example:
WARNING: CPU: 2 PID: 616 at drivers/base/core.c:251 device_release+0x8c/0x90
Device '(null)' does not have a release() function, it is broken and must be fixed.
And after setting the device name:
WARNING: CPU: 0 PID: 591 at drivers/base/core.c:251 device_release+0x8c/0x90
Device 's5p-mfc-l' does not have a release() function, it is broken and must be fixed.
Fixes: 6e83e6e25eb4 ("[media] s5p-mfc: Fix kernel warning on memory init")
Signed-off-by: Javier Martinez Canillas <javier@xxxxxxxxxxxxxxx>
Tested-by: Marek Szyprowski <m.szyprowski@xxxxxxxxxxx>
Signed-off-by: Sylwester Nawrocki <s.nawrocki@xxxxxxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
---
drivers/media/platform/s5p-mfc/s5p_mfc.c | 4 ++++
1 file changed, 4 insertions(+)
--- a/drivers/media/platform/s5p-mfc/s5p_mfc.c
+++ b/drivers/media/platform/s5p-mfc/s5p_mfc.c
@@ -1041,6 +1041,8 @@ static int s5p_mfc_alloc_memdevs(struct
mfc_err("Not enough memory\n");
return -ENOMEM;
}
+
+ dev_set_name(dev->mem_dev_l, "%s", "s5p-mfc-l");
device_initialize(dev->mem_dev_l);
of_property_read_u32_array(dev->plat_dev->dev.of_node,
"samsung,mfc-l", mem_info, 2);
@@ -1058,6 +1060,8 @@ static int s5p_mfc_alloc_memdevs(struct
mfc_err("Not enough memory\n");
return -ENOMEM;
}
+
+ dev_set_name(dev->mem_dev_r, "%s", "s5p-mfc-r");
device_initialize(dev->mem_dev_r);
of_property_read_u32_array(dev->plat_dev->dev.of_node,
"samsung,mfc-r", mem_info, 2);
Patches currently in stable-queue which might be from javier@xxxxxxxxxxxxxxx are
queue-4.4/serial-samsung-fix-err-pointer-dereference-on-deferred-probe.patch
queue-4.4/s5p-mfc-set-device-name-for-reserved-memory-region-devs.patch
queue-4.4/s5p-mfc-add-release-callback-for-memory-region-devs.patch
--
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