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authorThomas Gleixner <tglx@linutronix.de>2011-02-07 18:02:20 +0300
committerThomas Gleixner <tglx@linutronix.de>2011-02-19 14:58:07 +0300
commit3b8249e759c701c4a82f99d957be651a7657bf6f (patch)
treef758675da3bb37282eefd50e57456d09b208b452 /include/linux/irq.h
parent569bda8df11effa03e618729293c7961696abb10 (diff)
downloadlinux-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.h11
1 files changed, 11 insertions, 0 deletions
diff --git a/include/linux/irq.h b/include/linux/irq.h
index e9f847d56c4d..f5e900309d21 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;
/**