From: Madhuparna Bhowmik madhuparnabhowmik10@gmail.com
[ Upstream commit 64f4a62e3b17f1e473f971127c2924cae42afc82 ]
engine->stat_irq_thresh was initialized after device_create_file() in the probe function, the initialization may race with call to spacc_stat_irq_thresh_store() which updates engine->stat_irq_thresh, therefore initialize it before creating the file in probe function.
Found by Linux Driver Verification project (linuxtesting.org).
Fixes: ce92136843cb ("crypto: picoxcell - add support for the...") Signed-off-by: Madhuparna Bhowmik madhuparnabhowmik10@gmail.com Acked-by: Jamie Iles jamie@jamieiles.com Signed-off-by: Herbert Xu herbert@gondor.apana.org.au Signed-off-by: Sasha Levin sashal@kernel.org --- drivers/crypto/picoxcell_crypto.c | 9 ++++----- 1 file changed, 4 insertions(+), 5 deletions(-)
diff --git a/drivers/crypto/picoxcell_crypto.c b/drivers/crypto/picoxcell_crypto.c index 2680e1525db58..13ecbb0e58528 100644 --- a/drivers/crypto/picoxcell_crypto.c +++ b/drivers/crypto/picoxcell_crypto.c @@ -1697,11 +1697,6 @@ static int spacc_probe(struct platform_device *pdev) goto err_clk_put; }
- ret = device_create_file(&pdev->dev, &dev_attr_stat_irq_thresh); - if (ret) - goto err_clk_disable; - - /* * Use an IRQ threshold of 50% as a default. This seems to be a * reasonable trade off of latency against throughput but can be @@ -1709,6 +1704,10 @@ static int spacc_probe(struct platform_device *pdev) */ engine->stat_irq_thresh = (engine->fifo_sz / 2);
+ ret = device_create_file(&pdev->dev, &dev_attr_stat_irq_thresh); + if (ret) + goto err_clk_disable; + /* * Configure the interrupts. We only use the STAT_CNT interrupt as we * only submit a new packet for processing when we complete another in