Here is a set of GPIO fixes for the v4.9 kernel series:

- Fix up off-by one and line offset validation, info leak to
  userspace, and reject invalid flags. Those are especially
  valuable hardening patches from Lars-Peter Clausen, all tagged
  for stable.

- Fix module autoload for TS4800 and ATH79.

- Correct the IRQ handler for MPC8xxx to use handle_level_irq()
  as it (A) reacts to edges not levels and (B) even implements
  .irq_ack(). We were missing IRQs here.

- Fix the error path for acpi_dev_gpio_irq_get()

- Fix a memory leak in the MXS driver.

- Fix an annoying typo in the STMPE driver.

- Put a dependency on sysfs to the mockup driver.
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gpio: mpc8xxx: Correct irq handler function

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 <Gang.Liu@nxp.com>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
1 file changed