Patch "spi: hisi-sfc-v3xx: Return IRQ_NONE if no interrupts were detected" has been added to the 6.7-stable tree

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This is a note to let you know that I've just added the patch titled

    spi: hisi-sfc-v3xx: Return IRQ_NONE if no interrupts were detected

to the 6.7-stable tree which can be found at:
    http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary

The filename of the patch is:
     spi-hisi-sfc-v3xx-return-irq_none-if-no-interrupts-w.patch
and it can be found in the queue-6.7 subdirectory.

If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.



commit 9e00190b8a10c92b29ad3cacfad4292020ee233d
Author: Devyn Liu <liudingyuan@xxxxxxxxxx>
Date:   Tue Jan 23 15:11:49 2024 +0800

    spi: hisi-sfc-v3xx: Return IRQ_NONE if no interrupts were detected
    
    [ Upstream commit de8b6e1c231a95abf95ad097b993d34b31458ec9 ]
    
    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@xxxxxxxxxx>
    Link: https://msgid.link/r/20240123071149.917678-1-liudingyuan@xxxxxxxxxx
    Signed-off-by: Mark Brown <broonie@xxxxxxxxxx>
    Signed-off-by: Sasha Levin <sashal@xxxxxxxxxx>

diff --git a/drivers/spi/spi-hisi-sfc-v3xx.c b/drivers/spi/spi-hisi-sfc-v3xx.c
index 9d22018f7985f..1301d14483d48 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);
 




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