[ Upstream commit ba1bc0fcdeaf3bf583c1517bd2e3e29cf223c969 ]
The modification of EXIN register doesn't clean the bitfield before the writing of a new value. After a few modifications the bitfield would accumulate only '1's.
Signed-off-by: Petr Cvek petrcvekcz@gmail.com Signed-off-by: Paul Burton paul.burton@mips.com Cc: hauke@hauke-m.de Cc: john@phrozen.org Cc: linux-mips@vger.kernel.org Cc: openwrt-devel@lists.openwrt.org Cc: pakahmar@hotmail.com Signed-off-by: Sasha Levin sashal@kernel.org --- arch/mips/lantiq/irq.c | 5 +++-- 1 file changed, 3 insertions(+), 2 deletions(-)
diff --git a/arch/mips/lantiq/irq.c b/arch/mips/lantiq/irq.c index 8ac0e5994ed29..7c6f75c2aa4df 100644 --- a/arch/mips/lantiq/irq.c +++ b/arch/mips/lantiq/irq.c @@ -160,8 +160,9 @@ static int ltq_eiu_settype(struct irq_data *d, unsigned int type) if (edge) irq_set_handler(d->hwirq, handle_edge_irq);
- ltq_eiu_w32(ltq_eiu_r32(LTQ_EIU_EXIN_C) | - (val << (i * 4)), LTQ_EIU_EXIN_C); + ltq_eiu_w32((ltq_eiu_r32(LTQ_EIU_EXIN_C) & + (~(7 << (i * 4)))) | (val << (i * 4)), + LTQ_EIU_EXIN_C); } }