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spi: hisi-sfc-v3xx: Return IRQ_NONE if no interrupts were detected
[ Upstream commit de8b6e1c23
]
Return IRQ_NONE from the interrupt handler when no interrupt was
detected. Because an empty interrupt will cause a null pointer error:
Unable to handle kernel NULL pointer dereference at virtual
address 0000000000000008
Call trace:
complete+0x54/0x100
hisi_sfc_v3xx_isr+0x2c/0x40 [spi_hisi_sfc_v3xx]
__handle_irq_event_percpu+0x64/0x1e0
handle_irq_event+0x7c/0x1cc
Signed-off-by: Devyn Liu <liudingyuan@huawei.com>
Link: https://msgid.link/r/20240123071149.917678-1-liudingyuan@huawei.com
Signed-off-by: Mark Brown <broonie@kernel.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>
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1 changed files with 5 additions and 0 deletions
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@ -377,6 +377,11 @@ static const struct spi_controller_mem_ops hisi_sfc_v3xx_mem_ops = {
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static irqreturn_t hisi_sfc_v3xx_isr(int irq, void *data)
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{
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struct hisi_sfc_v3xx_host *host = data;
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u32 reg;
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reg = readl(host->regbase + HISI_SFC_V3XX_INT_STAT);
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if (!reg)
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return IRQ_NONE;
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hisi_sfc_v3xx_disable_int(host);
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