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| author | Milton Miller <miltonm@bga.com> | 2011-03-21 12:38:02 +0100 |
|---|---|---|
| committer | Benjamin Herrenschmidt <benh@kernel.crashing.org> | 2011-03-30 01:44:13 +0200 |
| commit | 4f1fc48a73a49a60b3e03e6d8fb363d1b328bd4e (patch) | |
| tree | 63dc74c40f516c5f993fe5ff1da8a62f7c54e545 | |
| parent | powerpc: Wire up new syscalls (diff) | |
| download | linux-4f1fc48a73a49a60b3e03e6d8fb363d1b328bd4e.tar.xz linux-4f1fc48a73a49a60b3e03e6d8fb363d1b328bd4e.zip | |
powerpc/xics: Fix numberspace mismatch from irq_desc conversion
commit 79f26c268ebad29bd75d078cfc09d3d82b30ccbd (powerpc:
platforms/pseries irq_data conversion) pushed irq_desc down into many
functions, dererencing the descriptor irq field as late as possible.
But it incorrectly passed a linix virtural irq number to RTAS,
resulting in the interrupt not being disabled and possibly
other bad things, such as another interrupt being disabled and/or
a checkstop.
In addition this missed the point of xics_mask_unknown_vec and
the seperation of xics_mask_real_irq from xics_mask_irq. When
xics_mask_unknown_vec is called it's because the hardware delivered an
irq source for which we have no linux irq allocated, and thefore we can
not have an irq_desc allocated.
Revert xics_mask_real_irq to its prior version, naming the argument
hwirq to highlight the difference.
Signed-off-by: Milton Miller <miltonm@bga.com>
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
| -rw-r--r-- | arch/powerpc/platforms/pseries/xics.c | 16 |
1 files changed, 8 insertions, 8 deletions
diff --git a/arch/powerpc/platforms/pseries/xics.c b/arch/powerpc/platforms/pseries/xics.c index 6c1e638f0ce9..9e7ff87a5950 100644 --- a/arch/powerpc/platforms/pseries/xics.c +++ b/arch/powerpc/platforms/pseries/xics.c @@ -250,26 +250,26 @@ static unsigned int xics_startup(struct irq_data *d) return 0; } -static void xics_mask_real_irq(struct irq_data *d) +static void xics_mask_real_irq(unsigned int hwirq) { int call_status; - if (d->irq == XICS_IPI) + if (hwirq == XICS_IPI) return; - call_status = rtas_call(ibm_int_off, 1, 1, NULL, d->irq); + call_status = rtas_call(ibm_int_off, 1, 1, NULL, hwirq); if (call_status != 0) { printk(KERN_ERR "%s: ibm_int_off irq=%u returned %d\n", - __func__, d->irq, call_status); + __func__, hwirq, call_status); return; } /* Have to set XIVE to 0xff to be able to remove a slot */ - call_status = rtas_call(ibm_set_xive, 3, 1, NULL, d->irq, + call_status = rtas_call(ibm_set_xive, 3, 1, NULL, hwirq, default_server, 0xff); if (call_status != 0) { printk(KERN_ERR "%s: ibm_set_xive(0xff) irq=%u returned %d\n", - __func__, d->irq, call_status); + __func__, hwirq, call_status); return; } } @@ -283,13 +283,13 @@ static void xics_mask_irq(struct irq_data *d) irq = (unsigned int)irq_map[d->irq].hwirq; if (irq == XICS_IPI || irq == XICS_IRQ_SPURIOUS) return; - xics_mask_real_irq(d); + xics_mask_real_irq(irq); } static void xics_mask_unknown_vec(unsigned int vec) { printk(KERN_ERR "Interrupt %u (real) is invalid, disabling it.\n", vec); - xics_mask_real_irq(irq_get_irq_data(vec)); + xics_mask_real_irq(vec); } static inline unsigned int xics_xirr_vector(unsigned int xirr) |