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| author | Devyn Liu <liudingyuan@huawei.com> | 2024-01-23 15:11:49 +0800 |
|---|---|---|
| committer | Mark Brown <broonie@kernel.org> | 2024-01-23 15:05:18 +0000 |
| commit | de8b6e1c231a95abf95ad097b993d34b31458ec9 (patch) | |
| tree | 6d33f5d85de4dbac5c8c09c9300f6dddb2d6d3c3 /drivers/spi | |
| parent | 633cd6fe6e1993ba80e0954c2db127a0b1a3e66f (diff) | |
| download | linux-de8b6e1c231a95abf95ad097b993d34b31458ec9.tar.gz linux-de8b6e1c231a95abf95ad097b993d34b31458ec9.tar.bz2 linux-de8b6e1c231a95abf95ad097b993d34b31458ec9.zip | |
spi: hisi-sfc-v3xx: Return IRQ_NONE if no interrupts were detected
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>
Diffstat (limited to 'drivers/spi')
| -rw-r--r-- | drivers/spi/spi-hisi-sfc-v3xx.c | 5 |
1 files changed, 5 insertions, 0 deletions
diff --git a/drivers/spi/spi-hisi-sfc-v3xx.c b/drivers/spi/spi-hisi-sfc-v3xx.c index 9d22018f7985..1301d14483d4 100644 --- a/drivers/spi/spi-hisi-sfc-v3xx.c +++ b/drivers/spi/spi-hisi-sfc-v3xx.c @@ -377,6 +377,11 @@ static const struct spi_controller_mem_ops hisi_sfc_v3xx_mem_ops = { static irqreturn_t hisi_sfc_v3xx_isr(int irq, void *data) { struct hisi_sfc_v3xx_host *host = data; + u32 reg; + + reg = readl(host->regbase + HISI_SFC_V3XX_INT_STAT); + if (!reg) + return IRQ_NONE; hisi_sfc_v3xx_disable_int(host); |