Messages in this thread | | | Date | Wed, 30 Nov 2022 12:18:05 +0100 | Subject | Re: [PATCH] mailbox: mtk-cmdq: Do not request irq until we are ready | From | AngeloGioacchino Del Regno <> |
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Il 25/11/22 17:19, Ricardo Ribalda ha scritto: > 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>
I agree on this change, but I've already sent a patch that's been reviewed by multiple people (hence ready to be picked), on top of which this patch will not apply.
Can you please rebase this patch on top of [1]?
Thanks, Angelo
[1]: https://patchwork.kernel.org/project/linux-mediatek/patch/20221102100736.37815-1-angelogioacchino.delregno@collabora.com/
> --- > To: Jassi Brar <jassisinghbrar@gmail.com> > To: Matthias Brugger <matthias.bgg@gmail.com> > Cc: linux-kernel@vger.kernel.org > Cc: linux-arm-kernel@lists.infradead.org > Cc: linux-mediatek@lists.infradead.org > --- > drivers/mailbox/mtk-cmdq-mailbox.c | 13 +++++++------ > 1 file changed, 7 insertions(+), 6 deletions(-) > > > --- > base-commit: 4312098baf37ee17a8350725e6e0d0e8590252d4 > change-id: 20221125-mtk-mailbox-ba6cbd1d91b6 > > Best regards, > > diff --git a/drivers/mailbox/mtk-cmdq-mailbox.c b/drivers/mailbox/mtk-cmdq-mailbox.c > index 9465f9081515..829f1ef3309f 100644 > --- a/drivers/mailbox/mtk-cmdq-mailbox.c > +++ b/drivers/mailbox/mtk-cmdq-mailbox.c > @@ -545,12 +545,6 @@ static int cmdq_probe(struct platform_device *pdev) > cmdq->control_by_sw = plat_data->control_by_sw; > cmdq->gce_num = plat_data->gce_num; > cmdq->irq_mask = GENMASK(cmdq->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); > @@ -613,6 +607,13 @@ static int cmdq_probe(struct platform_device *pdev) > > platform_set_drvdata(pdev, 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; > + } > + > WARN_ON(clk_bulk_prepare(cmdq->gce_num, cmdq->clocks)); > > cmdq_init(cmdq); >
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