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author | Thomas Gleixner <tglx@linutronix.de> | 2011-02-07 15:02:20 (GMT) |
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committer | Thomas Gleixner <tglx@linutronix.de> | 2011-02-19 11:58:07 (GMT) |
commit | 3b8249e759c701c4a82f99d957be651a7657bf6f (patch) | |
tree | f758675da3bb37282eefd50e57456d09b208b452 /include/linux/irq.h | |
parent | 569bda8df11effa03e618729293c7961696abb10 (diff) | |
download | linux-fsl-qoriq-3b8249e759c701c4a82f99d957be651a7657bf6f.tar.xz |
genirq: Do not copy affinity before set
While rumaging through arch code I found that there are a few
workarounds which deal with the fact that the initial affinity setting
from request_irq() copies the mask into irq_data->affinity before the
chip code is called. In the normal path we unconditionally copy the
mask when the chip code returns 0.
Copy after the code is called and add a return code
IRQ_SET_MASK_OK_NOCOPY for the chip functions, which prevents the
copy. That way we see the real mask when the chip function decided to
truncate it further as some arches do. IRQ_SET_MASK_OK is 0, which is
the current behaviour.
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Diffstat (limited to 'include/linux/irq.h')
-rw-r--r-- | include/linux/irq.h | 11 |
1 files changed, 11 insertions, 0 deletions
diff --git a/include/linux/irq.h b/include/linux/irq.h index e9f847d..f5e9003 100644 --- a/include/linux/irq.h +++ b/include/linux/irq.h @@ -85,6 +85,17 @@ typedef void (*irq_flow_handler_t)(unsigned int irq, # define IRQ_NO_BALANCING_MASK IRQ_NO_BALANCING #endif +/* + * Return value for chip->irq_set_affinity() + * + * IRQ_SET_MASK_OK - OK, core updates irq_data.affinity + * IRQ_SET_MASK_NOCPY - OK, chip did update irq_data.affinity + */ +enum { + IRQ_SET_MASK_OK = 0, + IRQ_SET_MASK_OK_NOCOPY, +}; + struct msi_desc; /** |