diff options
| author | Thomas Gleixner <tglx@linutronix.de> | 2011-03-17 19:32:49 +0000 |
|---|---|---|
| committer | Grant Likely <grant.likely@secretlab.ca> | 2011-03-17 13:49:03 -0600 |
| commit | 20e2aa916f6b56e6b1d9e34f4c6e8183d27cb81f (patch) | |
| tree | d7e73c2d4ca788208b54ad5b82a9c3128f15a5d5 | |
| parent | 61ab3fe57e45f365caf73d567926040bdb475217 (diff) | |
| download | linux-20e2aa916f6b56e6b1d9e34f4c6e8183d27cb81f.tar.bz2 | |
gpio/langwell: Fix broken irq_eoi change.
commit 0766d20fd (langwell_gpio: modify EOI handling following change
of kernel irq subsystem) changes
- desc->chip->eoi(irq);
+
+ if (desc->chip->irq_eoi)
+ desc->chip->irq_eoi(irq_get_irq_data(irq));
+ else
+ dev_warn(pg->chip.dev, "missing EOI handler for irq %d\n", irq);
With the following explanation:
"Latest kernel has many changes in IRQ subsystem and its interfaces,
like adding irq_eoi" for struct irq_chip, this patch will make it
support both the new and old interface."
This is completely bogus.
#1) The changelog does not match the patch at all
#2) This driver relies on the assumption that it sits behind an eoi
capable interrupt line. If the implementation of the underlying
chip changes from eoi to irq_eoi then this driver has to follow
that change and not add a total bogosity.
#3) Just mechanically changing eoi to irq_eoi without checking the
background of that change is sloppy at best.
Remove the sillyness and retrieve the interrupt data from irq_desc
directly. No need to go through a sparse irq lookup.
Reported-by: Stephen Rothwell <sfr@canb.auug.org.au>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Cc: Feng Tang <feng.tang@intel.com>
Cc: Alek Du <alek.du@intel.com>
Cc: Alan Cox <alan@lxorguk.ukuu.org.uk>
Cc: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Grant Likely <grant.likely@secretlab.ca>
| -rw-r--r-- | drivers/gpio/langwell_gpio.c | 13 |
1 files changed, 5 insertions, 8 deletions
diff --git a/drivers/gpio/langwell_gpio.c b/drivers/gpio/langwell_gpio.c index 54d70a47afc1..bb10156422e3 100644 --- a/drivers/gpio/langwell_gpio.c +++ b/drivers/gpio/langwell_gpio.c @@ -187,10 +187,11 @@ MODULE_DEVICE_TABLE(pci, lnw_gpio_ids); static void lnw_irq_handler(unsigned irq, struct irq_desc *desc) { - struct lnw_gpio *lnw = get_irq_data(irq); - u32 base, gpio; + struct irq_data *data = irq_desc_get_irq_data(desc); + struct lnw_gpio *lnw = irq_data_get_irq_handler_data(data); + struct irq_chip *chip = irq_data_get_irq_chip(data); + u32 base, gpio, gedr_v; void __iomem *gedr; - u32 gedr_v; /* check GPIO controller to check which pin triggered the interrupt */ for (base = 0; base < lnw->chip.ngpio; base += 32) { @@ -207,11 +208,7 @@ static void lnw_irq_handler(unsigned irq, struct irq_desc *desc) writel(gedr_v, gedr); } - if (desc->chip->irq_eoi) - desc->chip->irq_eoi(irq_get_irq_data(irq)); - else - dev_warn(lnw->chip.dev, "missing EOI handler for irq %d\n", irq); - + chip->irq_eoi(data); } static int __devinit lnw_gpio_probe(struct pci_dev *pdev, |