diff options
Diffstat (limited to 'target/linux/brcm2708/patches-4.4/0577-x86-ioapic-Restore-IO-APIC-irq_chip-retrigger-callba.patch')
| -rw-r--r-- | target/linux/brcm2708/patches-4.4/0577-x86-ioapic-Restore-IO-APIC-irq_chip-retrigger-callba.patch | 51 |
1 files changed, 51 insertions, 0 deletions
diff --git a/target/linux/brcm2708/patches-4.4/0577-x86-ioapic-Restore-IO-APIC-irq_chip-retrigger-callba.patch b/target/linux/brcm2708/patches-4.4/0577-x86-ioapic-Restore-IO-APIC-irq_chip-retrigger-callba.patch new file mode 100644 index 0000000000..cacfc5d2b4 --- /dev/null +++ b/target/linux/brcm2708/patches-4.4/0577-x86-ioapic-Restore-IO-APIC-irq_chip-retrigger-callba.patch @@ -0,0 +1,51 @@ +From 1dab2d7f80fa955ff493785033008b2c17f7cc53 Mon Sep 17 00:00:00 2001 +From: Ruslan Ruslichenko <rruslich@cisco.com> +Date: Tue, 17 Jan 2017 16:13:52 +0200 +Subject: [PATCH] x86/ioapic: Restore IO-APIC irq_chip retrigger callback + +commit 020eb3daaba2857b32c4cf4c82f503d6a00a67de upstream. + +commit d32932d02e18 removed the irq_retrigger callback from the IO-APIC +chip and did not add it to the new IO-APIC-IR irq chip. + +Unfortunately the software resend fallback is not enabled on X86, so edge +interrupts which are received during the lazy disabled state of the +interrupt line are not retriggered and therefor lost. + +Restore the callbacks. + +[ tglx: Massaged changelog ] + +Fixes: d32932d02e18 ("x86/irq: Convert IOAPIC to use hierarchical irqdomain interfaces") +Signed-off-by: Ruslan Ruslichenko <rruslich@cisco.com> +Cc: xe-linux-external@cisco.com +Link: http://lkml.kernel.org/r/1484662432-13580-1-git-send-email-rruslich@cisco.com +Signed-off-by: Thomas Gleixner <tglx@linutronix.de> +Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org> +--- + arch/x86/kernel/apic/io_apic.c | 2 ++ + 1 file changed, 2 insertions(+) + +diff --git a/arch/x86/kernel/apic/io_apic.c b/arch/x86/kernel/apic/io_apic.c +index 8ca533b..1e5d2f0 100644 +--- a/arch/x86/kernel/apic/io_apic.c ++++ b/arch/x86/kernel/apic/io_apic.c +@@ -1875,6 +1875,7 @@ static struct irq_chip ioapic_chip __read_mostly = { + .irq_ack = irq_chip_ack_parent, + .irq_eoi = ioapic_ack_level, + .irq_set_affinity = ioapic_set_affinity, ++ .irq_retrigger = irq_chip_retrigger_hierarchy, + .flags = IRQCHIP_SKIP_SET_WAKE, + }; + +@@ -1886,6 +1887,7 @@ static struct irq_chip ioapic_ir_chip __read_mostly = { + .irq_ack = irq_chip_ack_parent, + .irq_eoi = ioapic_ir_ack_level, + .irq_set_affinity = ioapic_set_affinity, ++ .irq_retrigger = irq_chip_retrigger_hierarchy, + .flags = IRQCHIP_SKIP_SET_WAKE, + }; + +-- +2.1.4 + |