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staging: kpc2000: kpc_dma: set error code in probe 

If device_create() fails during probing the device, kpc_dma_probe() does
not set the error code and returns 0. This can result in various bad
issues later. The patch sets the error code on the corresponding error
handling path.

Found by Linux Driver Verification project (linuxtesting.org).

Signed-off-by: Evgeny Novikov <novikov@ispras.ru>
Link: https://lore.kernel.org/r/20200623082959.14951-1-novikov@ispras.ru
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Evgeny Novikov 2020-06-23 11:29:59 +03:00 committed by Greg Kroah-Hartman
parent c8a00029dc
commit 8ce8668bfb
1 changed files with 1 additions and 0 deletions
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1
drivers/staging/kpc2000/kpc_dma/kpc_dma_driver.c
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@ -140,6 +140,7 @@ int kpc_dma_probe(struct platform_device *pldev)
dev = MKDEV(assigned_major_num, pldev->id); dev = MKDEV(assigned_major_num, pldev->id);
ldev->kpc_dma_dev = device_create(kpc_dma_class, &pldev->dev, dev, ldev, "kpc_dma%d", pldev->id); ldev->kpc_dma_dev = device_create(kpc_dma_class, &pldev->dev, dev, ldev, "kpc_dma%d", pldev->id);
if (IS_ERR(ldev->kpc_dma_dev)) { if (IS_ERR(ldev->kpc_dma_dev)) {
rv = PTR_ERR(ldev->kpc_dma_dev);
dev_err(&ldev->pldev->dev, "%s: device_create failed: %d\n", __func__, rv); dev_err(&ldev->pldev->dev, "%s: device_create failed: %d\n", __func__, rv);
goto err_kfree; goto err_kfree;
} }