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| author | Russell King <rmk+kernel@armlinux.org.uk> | 2017-04-10 16:28:20 +0100 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2017-04-13 10:59:11 -0400 |
| commit | a51e2c9da44acad7494ac3f57c48f296890cbe2a (patch) | |
| tree | de7821e1f727a02c9b5f58f00d917e700b70be3e | |
| parent | 2c26122e2c8d9b76b98995a7bd9f13a79dacfabe (diff) | |
| download | linux-stable-a51e2c9da44acad7494ac3f57c48f296890cbe2a.tar.gz linux-stable-a51e2c9da44acad7494ac3f57c48f296890cbe2a.tar.bz2 linux-stable-a51e2c9da44acad7494ac3f57c48f296890cbe2a.zip | |
net: mvmdio: disable interrupt if resource size is too small
Disable the MDIO interrupt, falling back to polled mode, if the resource
size does not allow us to access the interrupt registers. All current
DT bindings use a size of 0x84, which allows access, but verifying it is
good practice.
Signed-off-by: Russell King <rmk+kernel@armlinux.org.uk>
Reviewed-by: Andrew Lunn <andrew@lunn.ch>
Signed-off-by: David S. Miller <davem@davemloft.net>
| -rw-r--r-- | drivers/net/ethernet/marvell/mvmdio.c | 6 |
1 files changed, 6 insertions, 0 deletions
diff --git a/drivers/net/ethernet/marvell/mvmdio.c b/drivers/net/ethernet/marvell/mvmdio.c index 6ea5caddca62..614dfde657fe 100644 --- a/drivers/net/ethernet/marvell/mvmdio.c +++ b/drivers/net/ethernet/marvell/mvmdio.c @@ -221,6 +221,12 @@ static int orion_mdio_probe(struct platform_device *pdev) clk_prepare_enable(dev->clk); dev->err_interrupt = platform_get_irq(pdev, 0); + if (dev->err_interrupt > 0 && + resource_size(r) < MVMDIO_ERR_INT_MASK + 4) { + dev_err(&pdev->dev, + "disabling interrupt, resource size is too small\n"); + dev->err_interrupt = 0; + } if (dev->err_interrupt > 0) { ret = devm_request_irq(&pdev->dev, dev->err_interrupt, orion_mdio_err_irq, |