ipq806x: add thermal sensor driver

Allows to check cpu temperature.

Huge thanks to @hnyman for valuable assistance!

Signed-off-by: Pavel Kubelun <be.dissent@gmail.com>

1 files changed, 34 insertions, 0 deletions

diff --git a/target/linux/ipq806x/patches-4.4/019-2-nvmem-core-fix-error-path-in-nvmem_add_cells.patch b/target/linux/ipq806x/patches-4.4/019-2-nvmem-core-fix-error-path-in-nvmem_add_cells.patch
new file mode 100644
index 0000000000..1f9473bafd
--- /dev/null
+++ b/target/linux/ipq806x/patches-4.4/019-2-nvmem-core-fix-error-path-in-nvmem_add_cells.patch
@@ -0,0 +1,34 @@
+From dfdf141429f0895b63c882facc42c86f225033cb Mon Sep 17 00:00:00 2001
+From: Rasmus Villemoes <linux@rasmusvillemoes.dk>
+Date: Mon, 8 Feb 2016 22:04:29 +0100
+Subject: nvmem: core: fix error path in nvmem_add_cells()
+
+The current code fails to nvmem_cell_drop(cells[0]) - even worse, if
+the loop above fails already at i==0, we'll enter an essentially
+infinite loop doing nvmem_cell_drop on cells[-1], cells[-2], ... which
+is unlikely to end well.
+
+Also, we're not freeing the temporary backing array cells on the error
+path.
+
+Signed-off-by: Rasmus Villemoes <linux@rasmusvillemoes.dk>
+Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
+---
+ drivers/nvmem/core.c | 4 +++-
+ 1 file changed, 3 insertions(+), 1 deletion(-)
+
+--- a/drivers/nvmem/core.c
++++ b/drivers/nvmem/core.c
+@@ -294,9 +294,11 @@ static int nvmem_add_cells(struct nvmem_
+ 
+ 	return 0;
+ err:
+-	while (--i)
++	while (i--)
+ 		nvmem_cell_drop(cells[i]);
+ 
++	kfree(cells);
++
+ 	return rval;
+ }
+