diff options
| author | Rosen Penev <rosenp@gmail.com> | 2026-06-17 19:34:05 -0700 |
|---|---|---|
| committer | Jakub Kicinski <kuba@kernel.org> | 2026-06-21 14:57:51 -0700 |
| commit | f623d38fe6c4e8c40b23f42cc6fe6963fa49997b (patch) | |
| tree | 2eec46e41fe43eccdc7610058cc52919f3b75d6e | |
| parent | 617fb6fa9c34457ca37e0c1cf6c88d2f12b014a0 (diff) | |
net: emac: Fix NULL pointer dereference in emac_probe
Move devm_request_irq() after devm_platform_ioremap_resource() so that
dev->emacp is mapped before the interrupt handler can fire. An early
interrupt hitting emac_irq() would dereference the NULL dev->emacp and
crash.
Also remove redundant error message. devm_platform_ioremap_resource()
already returns an error message with dev_err_probe().
Fixes: dcc34ef7c834 ("net: ibm: emac: manage emac_irq with devm")
Signed-off-by: Rosen Penev <rosenp@gmail.com>
Reviewed-by: Andrew Lunn <andrew@lunn.ch>
Link: https://patch.msgid.link/20260618023405.415644-1-rosenp@gmail.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
| -rw-r--r-- | drivers/net/ethernet/ibm/emac/core.c | 13 |
1 files changed, 6 insertions, 7 deletions
diff --git a/drivers/net/ethernet/ibm/emac/core.c b/drivers/net/ethernet/ibm/emac/core.c index c0e1d85fce3f..1d46cf6c2c12 100644 --- a/drivers/net/ethernet/ibm/emac/core.c +++ b/drivers/net/ethernet/ibm/emac/core.c @@ -3044,6 +3044,12 @@ static int emac_probe(struct platform_device *ofdev) if (err) goto err_gone; + dev->emacp = devm_platform_ioremap_resource(ofdev, 0); + if (IS_ERR(dev->emacp)) { + err = PTR_ERR(dev->emacp); + goto err_gone; + } + /* Setup error IRQ handler */ dev->emac_irq = platform_get_irq(ofdev, 0); if (dev->emac_irq < 0) { @@ -3061,13 +3067,6 @@ static int emac_probe(struct platform_device *ofdev) ndev->irq = dev->emac_irq; - dev->emacp = devm_platform_ioremap_resource(ofdev, 0); - if (IS_ERR(dev->emacp)) { - dev_err(&ofdev->dev, "can't map device registers"); - err = PTR_ERR(dev->emacp); - goto err_gone; - } - /* Wait for dependent devices */ err = emac_wait_deps(dev); if (err) |