Commit 1a472e4c authored by Arvind Yadav's avatar Arvind Yadav Committed by Sasha Levin

ata: sata_mv:- Handle return value of devm_ioremap.

[ Upstream commit 064c3db9 ]

Here, If devm_ioremap will fail. It will return NULL.
Then hpriv->base = NULL - 0x20000; Kernel can run into
a NULL-pointer dereference. This error check will avoid
NULL pointer dereference.
Signed-off-by: default avatarArvind Yadav <arvind.yadav.cs@gmail.com>
Signed-off-by: default avatarTejun Heo <tj@kernel.org>
Cc: stable@vger.kernel.org
Signed-off-by: default avatarSasha Levin <alexander.levin@verizon.com>
parent 87f67424
......@@ -4121,6 +4121,9 @@ static int mv_platform_probe(struct platform_device *pdev)
host->iomap = NULL;
hpriv->base = devm_ioremap(&pdev->dev, res->start,
resource_size(res));
if (!hpriv->base)
return -ENOMEM;
hpriv->base -= SATAHC0_REG_BASE;
hpriv->clk = clk_get(&pdev->dev, NULL);
......
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