This is a note to let you know that I've just added the patch titled
spi: mediatek: Enable irq when pdata is ready
to the 6.1-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-mediatek-enable-irq-when-pdata-is-ready.patch
and it can be found in the queue-6.1 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.
commit 8f586773b6314db19589e23adcf872b6c851b541
Author: Ricardo Ribalda <ribalda@xxxxxxxxxxxx>
Date: Mon Nov 28 12:00:01 2022 +0100
spi: mediatek: Enable irq when pdata is ready
[ Upstream commit c6f7874687f7027d7c4b2f53ff6e4d22850f915d ]
If the device does not come straight from reset, we might receive an IRQ
before we are ready to handle it.
Fixes:
[ 0.832328] Unable to handle kernel read from unreadable memory at virtual address 0000000000000010
[ 1.040343] Call trace:
[ 1.040347] mtk_spi_can_dma+0xc/0x40
...
[ 1.262265] start_kernel+0x338/0x42c
Signed-off-by: Ricardo Ribalda <ribalda@xxxxxxxxxxxx>
Reviewed-by: AngeloGioacchino Del Regno <angelogioacchino.delregno@xxxxxxxxxxxxx>
Link: https://lore.kernel.org/r/20221128-spi-mt65xx-v1-0-509266830665@xxxxxxxxxxxx
Signed-off-by: Mark Brown <broonie@xxxxxxxxxx>
Signed-off-by: Sasha Levin <sashal@xxxxxxxxxx>
diff --git a/drivers/spi/spi-mt65xx.c b/drivers/spi/spi-mt65xx.c
index d6aff909fc365..6de8360e5c2a9 100644
--- a/drivers/spi/spi-mt65xx.c
+++ b/drivers/spi/spi-mt65xx.c
@@ -1192,11 +1192,6 @@ static int mtk_spi_probe(struct platform_device *pdev)
else
dma_set_max_seg_size(dev, SZ_256K);
- ret = devm_request_irq(dev, irq, mtk_spi_interrupt,
- IRQF_TRIGGER_NONE, dev_name(dev), master);
- if (ret)
- return dev_err_probe(dev, ret, "failed to register irq\n");
-
mdata->parent_clk = devm_clk_get(dev, "parent-clk");
if (IS_ERR(mdata->parent_clk))
return dev_err_probe(dev, PTR_ERR(mdata->parent_clk),
@@ -1266,6 +1261,13 @@ static int mtk_spi_probe(struct platform_device *pdev)
return dev_err_probe(dev, ret, "failed to register master\n");
}
+ ret = devm_request_irq(dev, irq, mtk_spi_interrupt,
+ IRQF_TRIGGER_NONE, dev_name(dev), master);
+ if (ret) {
+ pm_runtime_disable(dev);
+ return dev_err_probe(dev, ret, "failed to register irq\n");
+ }
+
return 0;
}
