diff options
| author | Ricardo Ribalda <ribalda@chromium.org> | 2022-11-30 15:58:22 +0300 |
|---|---|---|
| committer | Jassi Brar <jaswinder.singh@linaro.org> | 2022-12-19 05:40:31 +0300 |
| commit | 16edcfef77147748c43c9c58ce18f59c61d1c357 (patch) | |
| tree | 97a89d1f6f6401a65e3fc5c0e973b0638bac9bac /drivers/mailbox/mtk-cmdq-mailbox.c | |
| parent | a6792a0cdef0b1c2d77920246283a72537e60e94 (diff) | |
| download | linux-16edcfef77147748c43c9c58ce18f59c61d1c357.tar.xz | |
mailbox: mtk-cmdq: Do not request irq until we are ready
If the system comes from kexec() the peripheral might trigger an IRQ
befoe we are ready for it. Triggering a crash due to an access to
invalid memory.
Signed-off-by: Ricardo Ribalda <ribalda@chromium.org>
Reviewed-by: AngeloGioacchino Del Regno <angelogioacchino.delregno@collabora.com>
Reviewed-by: Chun-Kuang Hu <chunkuang.hu@kernel.org>
Signed-off-by: Jassi Brar <jaswinder.singh@linaro.org>
Diffstat (limited to 'drivers/mailbox/mtk-cmdq-mailbox.c')
| -rw-r--r-- | drivers/mailbox/mtk-cmdq-mailbox.c | 13 |
1 files changed, 7 insertions, 6 deletions
diff --git a/drivers/mailbox/mtk-cmdq-mailbox.c b/drivers/mailbox/mtk-cmdq-mailbox.c index a460ee26eb11..b18d47ea13a0 100644 --- a/drivers/mailbox/mtk-cmdq-mailbox.c +++ b/drivers/mailbox/mtk-cmdq-mailbox.c @@ -569,12 +569,6 @@ static int cmdq_probe(struct platform_device *pdev) } cmdq->irq_mask = GENMASK(cmdq->pdata->thread_nr - 1, 0); - err = devm_request_irq(dev, cmdq->irq, cmdq_irq_handler, IRQF_SHARED, - "mtk_cmdq", cmdq); - if (err < 0) { - dev_err(dev, "failed to register ISR (%d)\n", err); - return err; - } dev_dbg(dev, "cmdq device: addr:0x%p, va:0x%p, irq:%d\n", dev, cmdq->base, cmdq->irq); @@ -641,6 +635,13 @@ static int cmdq_probe(struct platform_device *pdev) cmdq_init(cmdq); + err = devm_request_irq(dev, cmdq->irq, cmdq_irq_handler, IRQF_SHARED, + "mtk_cmdq", cmdq); + if (err < 0) { + dev_err(dev, "failed to register ISR (%d)\n", err); + return err; + } + return 0; } |