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| author | Fabien Dessenne <fabien.dessenne@st.com> | 2019-01-04 14:47:16 +0100 |
|---|---|---|
| committer | Jassi Brar <jaswinder.singh@linaro.org> | 2019-03-07 03:33:14 +0100 |
| commit | 6899b4f7c99c72968e58e502f96084f74f6e5e86 (patch) | |
| tree | eaadd851a9974acd2eb4a22267992b26b0a2380b /drivers/mailbox | |
| parent | mailbox: mailbox-test: fix debugfs in multi-instances (diff) | |
| download | linux-6899b4f7c99c72968e58e502f96084f74f6e5e86.tar.xz linux-6899b4f7c99c72968e58e502f96084f74f6e5e86.zip | |
mailbox: mailbox-test: fix null pointer if no mmio
Fix null pointer issue if resource_size is called with no ioresource.
Signed-off-by: Ludovic Barre <ludovic.barre@st.com>
Signed-off-by: Fabien Dessenne <fabien.dessenne@st.com>
Signed-off-by: Jassi Brar <jaswinder.singh@linaro.org>
Diffstat (limited to 'drivers/mailbox')
| -rw-r--r-- | drivers/mailbox/mailbox-test.c | 14 |
1 files changed, 8 insertions, 6 deletions
diff --git a/drivers/mailbox/mailbox-test.c b/drivers/mailbox/mailbox-test.c index 4e2bfba39d52..4e4ac4be6423 100644 --- a/drivers/mailbox/mailbox-test.c +++ b/drivers/mailbox/mailbox-test.c @@ -363,22 +363,24 @@ static int mbox_test_probe(struct platform_device *pdev) /* It's okay for MMIO to be NULL */ res = platform_get_resource(pdev, IORESOURCE_MEM, 0); - size = resource_size(res); tdev->tx_mmio = devm_ioremap_resource(&pdev->dev, res); - if (PTR_ERR(tdev->tx_mmio) == -EBUSY) + if (PTR_ERR(tdev->tx_mmio) == -EBUSY) { /* if reserved area in SRAM, try just ioremap */ + size = resource_size(res); tdev->tx_mmio = devm_ioremap(&pdev->dev, res->start, size); - else if (IS_ERR(tdev->tx_mmio)) + } else if (IS_ERR(tdev->tx_mmio)) { tdev->tx_mmio = NULL; + } /* If specified, second reg entry is Rx MMIO */ res = platform_get_resource(pdev, IORESOURCE_MEM, 1); - size = resource_size(res); tdev->rx_mmio = devm_ioremap_resource(&pdev->dev, res); - if (PTR_ERR(tdev->rx_mmio) == -EBUSY) + if (PTR_ERR(tdev->rx_mmio) == -EBUSY) { + size = resource_size(res); tdev->rx_mmio = devm_ioremap(&pdev->dev, res->start, size); - else if (IS_ERR(tdev->rx_mmio)) + } else if (IS_ERR(tdev->rx_mmio)) { tdev->rx_mmio = tdev->tx_mmio; + } tdev->tx_channel = mbox_test_request_channel(pdev, "tx"); tdev->rx_channel = mbox_test_request_channel(pdev, "rx"); |