diff options
| author | Madhuparna Bhowmik <madhuparnabhowmik10@gmail.com> | 2020-04-16 11:53:35 +0530 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2020-05-20 08:11:44 +0200 |
| commit | 329a8c9d417bb2cf822be633dd2b4c5d77cd1586 (patch) | |
| tree | f2c5baf7eebbd1b180306cb7fff6f0680e8c4787 /drivers/dma | |
| parent | 41f53bf3898ad11862777aab420b55d8a6dc844d (diff) | |
dmaengine: pch_dma.c: Avoid data race between probe and irq handler
[ Upstream commit 2e45676a4d33af47259fa186ea039122ce263ba9 ]
pd->dma.dev is read in irq handler pd_irq().
However, it is set to pdev->dev after request_irq().
Therefore, set pd->dma.dev to pdev->dev before request_irq() to
avoid data race between pch_dma_probe() and pd_irq().
Found by Linux Driver Verification project (linuxtesting.org).
Signed-off-by: Madhuparna Bhowmik <madhuparnabhowmik10@gmail.com>
Link: https://lore.kernel.org/r/20200416062335.29223-1-madhuparnabhowmik10@gmail.com
Signed-off-by: Vinod Koul <vkoul@kernel.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>
Diffstat (limited to 'drivers/dma')
| -rw-r--r-- | drivers/dma/pch_dma.c | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/drivers/dma/pch_dma.c b/drivers/dma/pch_dma.c index 113605f6fe20..32517003e118 100644 --- a/drivers/dma/pch_dma.c +++ b/drivers/dma/pch_dma.c @@ -877,6 +877,7 @@ static int pch_dma_probe(struct pci_dev *pdev, } pci_set_master(pdev); + pd->dma.dev = &pdev->dev; err = request_irq(pdev->irq, pd_irq, IRQF_SHARED, DRV_NAME, pd); if (err) { @@ -892,7 +893,6 @@ static int pch_dma_probe(struct pci_dev *pdev, goto err_free_irq; } - pd->dma.dev = &pdev->dev; INIT_LIST_HEAD(&pd->dma.channels); |