Commit a51e2c9d authored by Russell King's avatar Russell King Committed by David S. Miller

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: default avatarRussell King <rmk+kernel@armlinux.org.uk>
Reviewed-by: default avatarAndrew Lunn <andrew@lunn.ch>
Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
parent 2c26122e
......@@ -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,
......
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