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crypto: picoxcell - Fix error handling in spacc_probe()

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If clk_get() fails, device_remove_file() looks inappropriate.

The error path, where all crypto_register fail, misses resource
deallocations.

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

Signed-off-by: Alexey Khoroshilov <khoroshilov@ispras.ru>
Reviewed-by: Jamie Iles <jamie@jamieiles.com>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
This commit is contained in:
Alexey Khoroshilov 2018-01-20 00:53:15 +03:00 committed by Herbert Xu
parent fb87127bce
commit 2d55807b7f
1 changed files with 17 additions and 10 deletions
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27
drivers/crypto/picoxcell_crypto.c
View file

@ -1618,7 +1618,7 @@ MODULE_DEVICE_TABLE(of, spacc_of_id_table);
static int spacc_probe(struct platform_device *pdev)
{
int i, err, ret = -EINVAL;
int i, err, ret;
struct resource *mem, *irq;
struct device_node *np = pdev->dev.of_node;
struct spacc_engine *engine = devm_kzalloc(&pdev->dev, sizeof(*engine),
@ -1679,22 +1679,18 @@ static int spacc_probe(struct platform_device *pdev)
engine->clk = clk_get(&pdev->dev, "ref");
if (IS_ERR(engine->clk)) {
dev_info(&pdev->dev, "clk unavailable\n");
device_remove_file(&pdev->dev, &dev_attr_stat_irq_thresh);
return PTR_ERR(engine->clk);
}
if (clk_prepare_enable(engine->clk)) {
dev_info(&pdev->dev, "unable to prepare/enable clk\n");
clk_put(engine->clk);
return -EIO;
ret = -EIO;
goto err_clk_put;
}
err = device_create_file(&pdev->dev, &dev_attr_stat_irq_thresh);
if (err) {
clk_disable_unprepare(engine->clk);
clk_put(engine->clk);
return err;
}
ret = device_create_file(&pdev->dev, &dev_attr_stat_irq_thresh);
if (ret)
goto err_clk_disable;
/*
@ -1725,6 +1721,7 @@ static int spacc_probe(struct platform_device *pdev)
platform_set_drvdata(pdev, engine);
ret = -EINVAL;
INIT_LIST_HEAD(&engine->registered_algs);
for (i = 0; i < engine->num_algs; ++i) {
engine->algs[i].engine = engine;
@ -1759,6 +1756,16 @@ static int spacc_probe(struct platform_device *pdev)
engine->aeads[i].alg.base.cra_name);
}
if (!ret)
return 0;
del_timer_sync(&engine->packet_timeout);
device_remove_file(&pdev->dev, &dev_attr_stat_irq_thresh);
err_clk_disable:
clk_disable_unprepare(engine->clk);
err_clk_put:
clk_put(engine->clk);
return ret;
}