linux-stable.git/drivers/gpio, branch linux-3.10.y

gpio: mpc8xxx: Correct irq handler function

2017-02-10T10:04:03+00:00

commit d71cf15b865bdd45925f7b094d169aaabd705145 upstream.

From the beginning of the gpio-mpc8xxx.c, the "handle_level_irq"
has being used to handle GPIO interrupts in the PowerPC/Layerscape
platforms. But actually, almost all PowerPC/Layerscape platforms
assert an interrupt request upon either a high-to-low change or
any change on the state of the signal.

So the "handle_level_irq" is not reasonable for PowerPC/Layerscape
GPIO interrupt, it should be "handle_edge_irq". Otherwise the system
may lost some interrupts from the PIN's state changes.

Signed-off-by: Liu Gang 
Signed-off-by: Linus Walleij 
Signed-off-by: Willy Tarreau

gpio: pca953x: Fix NBANK calculation for PCA9536

2016-08-27T09:40:35+00:00

commit a246b8198f776a16d1d3a3bbfc2d437bad766b29 upstream.

NBANK() macro assumes that ngpios is a multiple of 8(BANK_SZ) and
hence results in 0 banks for PCA9536 which has just 4 gpios. This is
wrong as PCA9356 has 1 bank with 4 gpios. This results in uninitialized
PCA953X_INVERT register. Fix this by using DIV_ROUND_UP macro in
NBANK().

Cc: stable@vger.kernel.org
Signed-off-by: Vignesh R 
Signed-off-by: Linus Walleij 
Signed-off-by: Willy Tarreau

gpio: sysfs: fix memory leaks and device hotplug

2015-05-17T16:51:32+00:00

commit 483d821108791092798f5d230686868112927044 upstream.

Unregister GPIOs requested through sysfs at chip remove to avoid leaking
the associated memory and sysfs entries.

The stale sysfs entries prevented the gpio numbers from being exported
when the gpio range was later reused (e.g. at device reconnect).

This also fixes the related module-reference leak.

Note that kernfs makes sure that any on-going sysfs operations finish
before the class devices are unregistered and that further accesses
fail.

The chip exported flag is used to prevent gpiod exports during removal.
This also makes it harder to trigger, but does not fix, the related race
between gpiochip_remove and export_store, which is really a race with
gpiod_request that needs to be addressed separately.

Also note that this would prevent the crashes (e.g. NULL-dereferences)
at reconnect that affects pre-3.18 kernels, as well as use-after-free on
operations on open attribute files on pre-3.14 kernels (prior to
kernfs).

Fixes: d8f388d8dc8d ("gpio: sysfs interface")
Signed-off-by: Johan Hovold 
Signed-off-by: Linus Walleij 
Signed-off-by: Greg Kroah-Hartman

gpio: unregister gpiochip device before removing it

2015-05-17T16:51:32+00:00

commit 01cca93a9491ed95992523ff7e79dd9bfcdea8e0 upstream.

Unregister gpiochip device (used to export information through sysfs)
before removing it internally. This way removal will reverse addition.

Signed-off-by: Johan Hovold 
Signed-off-by: Linus Walleij 
Signed-off-by: Greg Kroah-Hartman

gpio: tps65912: fix wrong container_of arguments

2015-03-06T22:40:52+00:00

commit 2f97c20e5f7c3582c7310f65a04465bfb0fd0e85 upstream.

The gpio_chip operations receive a pointer the gpio_chip struct which is
contained in the driver's private struct, yet the container_of call in those
functions point to the mfd struct defined in include/linux/mfd/tps65912.h.

Signed-off-by: Nicolas Saenz Julienne 
Signed-off-by: Linus Walleij 
Signed-off-by: Greg Kroah-Hartman

gpio: sysfs: fix memory leak in gpiod_sysfs_set_active_low

2015-02-11T06:48:16+00:00

commit 49d2ca84e433dab854c7a866bc6add09cfab682d upstream.

Fix memory leak in the gpio sysfs interface due to failure to drop
reference to device returned by class_find_device when setting the
gpio-line polarity.

Fixes: 0769746183ca ("gpiolib: add support for changing value polarity in sysfs")
Signed-off-by: Johan Hovold 
Signed-off-by: Linus Walleij 
Signed-off-by: Greg Kroah-Hartman

gpio: sysfs: fix memory leak in gpiod_export_link

2015-02-11T06:48:16+00:00

commit 0f303db08df0df9bd0966443ad6001e63960af16 upstream.

Fix memory leak in the gpio sysfs interface due to failure to drop
reference to device returned by class_find_device when creating a link.

Fixes: a4177ee7f1a8 ("gpiolib: allow exported GPIO nodes to be named using sysfs links")
Signed-off-by: Johan Hovold 
Signed-off-by: Linus Walleij 
Signed-off-by: Greg Kroah-Hartman

gpio: squelch a compiler warning

2015-02-06T06:35:40+00:00

drivers/gpio/gpiolib-of.c: In function 'of_gpiochip_find_and_xlate':
drivers/gpio/gpiolib-of.c:51:21: warning: assignment makes integer from
pointer without a cast [enabled by default]
   gg_data->out_gpio = ERR_PTR(ret);
                     ^
this was introduced in d1c3449160df60fac4abb56f0ba0a3784305e43e

the upstream kernel changed the type of out_gpio from int to struct gpio_desc *
as part of a larger refactoring that wasn't backported

Signed-off-by: Martin Kaiser 
Signed-off-by: Greg Kroah-Hartman

gpio: sysfs: fix gpio device-attribute leak

2015-01-30T01:40:55+00:00

commit 0915e6feb38de8d3601819992a5bd050201a56fa upstream.

The gpio device attributes were never destroyed when the gpio was
unexported (or on export failures).

Use device_create_with_groups() to create the default device attributes
of the gpio class device. Note that this also fixes the
attribute-creation race with userspace for these attributes.

Remove contingent attributes in export error path and on unexport.

Fixes: d8f388d8dc8d ("gpio: sysfs interface")
Cc: stable 	# v2.6.27+
Signed-off-by: Johan Hovold 
Signed-off-by: Linus Walleij 
Signed-off-by: Greg Kroah-Hartman

gpio: sysfs: fix gpio-chip device-attribute leak

2015-01-30T01:40:55+00:00

commit 121b6a79955a3a3fd7bbb9b8cb88d5b9dad6283d upstream.

The gpio-chip device attributes were never destroyed when the device was
removed.

Fix by using device_create_with_groups() to create the device attributes
of the chip class device.

Note that this also fixes the attribute-creation race with userspace.

Fixes: d8f388d8dc8d ("gpio: sysfs interface")
Signed-off-by: Johan Hovold 
Signed-off-by: Linus Walleij 
Signed-off-by: Greg Kroah-Hartman