3.14-stable patches

added patches:
	iio-ak8975-fix-null-pointer-exception-on-early-interrupt.patch

diff --git a/queue-3.14/iio-ak8975-fix-null-pointer-exception-on-early-interrupt.patch b/queue-3.14/iio-ak8975-fix-null-pointer-exception-on-early-interrupt.patch
new file mode 100644 (file)
index 0000000..7d58a36
--- /dev/null
+++ b/queue-3.14/iio-ak8975-fix-null-pointer-exception-on-early-interrupt.patch
@@ -0,0 +1,72 @@
+From 07d2390e36ee5b3265e9cc8305f2a106c8721e16 Mon Sep 17 00:00:00 2001
+From: Krzysztof Kozlowski <k.kozlowski@samsung.com>
+Date: Mon, 4 Apr 2016 14:54:59 +0900
+Subject: iio: ak8975: Fix NULL pointer exception on early interrupt
+
+From: Krzysztof Kozlowski <k.kozlowski@samsung.com>
+
+commit 07d2390e36ee5b3265e9cc8305f2a106c8721e16 upstream.
+
+In certain probe conditions the interrupt came right after registering
+the handler causing a NULL pointer exception because of uninitialized
+waitqueue:
+
+$ udevadm trigger
+i2c-gpio i2c-gpio-1: using pins 143 (SDA) and 144 (SCL)
+i2c-gpio i2c-gpio-3: using pins 53 (SDA) and 52 (SCL)
+Unable to handle kernel NULL pointer dereference at virtual address 00000000
+pgd = e8b38000
+[00000000] *pgd=00000000
+Internal error: Oops: 5 [#1] SMP ARM
+Modules linked in: snd_soc_i2s(+) i2c_gpio(+) snd_soc_idma snd_soc_s3c_dma snd_soc_core snd_pcm_dmaengine snd_pcm snd_timer snd soundcore ac97_bus spi_s3c64xx pwm_samsung dwc2 exynos_adc phy_exynos_usb2 exynosdrm exynos_rng rng_core rtc_s3c
+CPU: 0 PID: 717 Comm: data-provider-m Not tainted 4.6.0-rc1-next-20160401-00011-g1b8d87473b9e-dirty #101
+Hardware name: SAMSUNG EXYNOS (Flattened Device Tree)
+(...)
+(__wake_up_common) from [<c0379624>] (__wake_up+0x38/0x4c)
+(__wake_up) from [<c0a41d30>] (ak8975_irq_handler+0x28/0x30)
+(ak8975_irq_handler) from [<c0386720>] (handle_irq_event_percpu+0x88/0x140)
+(handle_irq_event_percpu) from [<c038681c>] (handle_irq_event+0x44/0x68)
+(handle_irq_event) from [<c0389c40>] (handle_edge_irq+0xf0/0x19c)
+(handle_edge_irq) from [<c0385e04>] (generic_handle_irq+0x24/0x34)
+(generic_handle_irq) from [<c05ee360>] (exynos_eint_gpio_irq+0x50/0x68)
+(exynos_eint_gpio_irq) from [<c0386720>] (handle_irq_event_percpu+0x88/0x140)
+(handle_irq_event_percpu) from [<c038681c>] (handle_irq_event+0x44/0x68)
+(handle_irq_event) from [<c0389a70>] (handle_fasteoi_irq+0xb4/0x194)
+(handle_fasteoi_irq) from [<c0385e04>] (generic_handle_irq+0x24/0x34)
+(generic_handle_irq) from [<c03860b4>] (__handle_domain_irq+0x5c/0xb4)
+(__handle_domain_irq) from [<c0301774>] (gic_handle_irq+0x54/0x94)
+(gic_handle_irq) from [<c030c910>] (__irq_usr+0x50/0x80)
+
+The bug was reproduced on exynos4412-trats2 (with a max77693 device also
+using i2c-gpio) after building max77693 as a module.
+
+Fixes: 94a6d5cf7caa ("iio:ak8975 Implement data ready interrupt handling")
+Signed-off-by: Krzysztof Kozlowski <k.kozlowski@samsung.com>
+Tested-by: Gregor Boirie <gregor.boirie@parrot.com>
+Signed-off-by: Jonathan Cameron <jic23@kernel.org>
+Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
+
+---
+ drivers/iio/magnetometer/ak8975.c |    4 ++--
+ 1 file changed, 2 insertions(+), 2 deletions(-)
+
+--- a/drivers/iio/magnetometer/ak8975.c
++++ b/drivers/iio/magnetometer/ak8975.c
+@@ -151,6 +151,8 @@ static int ak8975_setup_irq(struct ak897
+       int rc;
+       int irq;
+ 
++      init_waitqueue_head(&data->data_ready_queue);
++      clear_bit(0, &data->flags);
+       if (client->irq)
+               irq = client->irq;
+       else
+@@ -166,8 +168,6 @@ static int ak8975_setup_irq(struct ak897
+               return rc;
+       }
+ 
+-      init_waitqueue_head(&data->data_ready_queue);
+-      clear_bit(0, &data->flags);
+       data->eoc_irq = irq;
+ 
+       return rc;

diff --git a/queue-3.14/series b/queue-3.14/series
index db651f4f5456a46c96c6dff912843364b2fbb80c..ea07da4759249826f53844756d0f8d06d5628dad 100644 (file)
--- a/queue-3.14/series
+++ b/queue-3.14/series
@@ -18,3 +18,4 @@ x86-sysfb_efi-fix-valid-bar-address-range-check.patch
 acpica-dispatcher-update-thread-id-for-recursive-method-calls.patch
 usb-serial-cp210x-add-id-for-link-ecu.patch
 usb-serial-cp210x-add-straizona-focusers-device-ids.patch
+iio-ak8975-fix-null-pointer-exception-on-early-interrupt.patch