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author | Mark Rutland <mark.rutland@arm.com> | 2021-10-20 15:24:40 +0100 |
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committer | Mark Rutland <mark.rutland@arm.com> | 2021-10-25 10:05:07 +0100 |
commit | bab4ff1edccd5853c956ac72e5152b073a237b50 (patch) | |
tree | 8e58e2175035d2555b6fb1fada441acb4488d74b /arch/mips/cavium-octeon | |
parent | 46b61c88e1075829103874c95f13160e3b9e1618 (diff) | |
download | lwn-bab4ff1edccd5853c956ac72e5152b073a237b50.tar.gz lwn-bab4ff1edccd5853c956ac72e5152b073a237b50.zip |
irq: mips: stop (ab)using handle_domain_irq()
On MIPS, the only user of handle_domain_irq() is octeon_irq_ciu3_ip2(),
which is called from the platform-specific plat_irq_dispatch() function
invoked from the early assembly code.
No other irqchip relevant to arch/mips uses handle_domain_irq():
* No other plat_irq_dispatch() function transitively calls
handle_domain_irq().
* No other vectored IRQ dispatch function registered with
set_vi_handler() calls handle_domain_irq().
* No chained irqchip handlers call handle_domain_irq(), which makes
sense as this is meant to only be used by root irqchip handlers.
Currently octeon_irq_ciu3_ip2() passes NULL as the `regs` argument to
handle_domain_irq(), and as handle_domain_irq() will pass this to
set_irq_regs(), any invoked IRQ handlers will erroneously see a NULL
pt_regs if they call get_pt_regs().
Fix this by calling generic_handle_domain_irq() directly, and performing
the necessary irq_{enter,exit}() logic directly in
octeon_irq_ciu3_ip2(). At the same time, deselect HANDLE_DOMAIN_IRQ,
which subsequent patches will remove.
Other than the corrected behaviour of get_pt_regs(), there should be no
functional change as a result of this patch.
Fixes: ce210d35bb93c2c5 ("MIPS: OCTEON: Add support for OCTEON III interrupt controller.")
Signed-off-by: Mark Rutland <mark.rutland@arm.com>
Reviewed-by: Marc Zyngier <maz@kernel.org>
Acked-by: Thomas Bogendoerfer <tsbogend@alpha.franken.de>
Cc: Thomas Gleixner <tglx@linutronix.de>
Diffstat (limited to 'arch/mips/cavium-octeon')
-rw-r--r-- | arch/mips/cavium-octeon/octeon-irq.c | 5 |
1 files changed, 4 insertions, 1 deletions
diff --git a/arch/mips/cavium-octeon/octeon-irq.c b/arch/mips/cavium-octeon/octeon-irq.c index be5d4afcd30f..844f882096e6 100644 --- a/arch/mips/cavium-octeon/octeon-irq.c +++ b/arch/mips/cavium-octeon/octeon-irq.c @@ -2609,7 +2609,10 @@ static void octeon_irq_ciu3_ip2(void) else hw = intsn; - ret = handle_domain_irq(domain, hw, NULL); + irq_enter(); + ret = generic_handle_domain_irq(domain, hw); + irq_exit(); + if (ret < 0) { union cvmx_ciu3_iscx_w1c isc_w1c; u64 isc_w1c_addr = ciu3_addr + CIU3_ISC_W1C(intsn); |