On Mon, Oct 21, 2013 at 11:34:07AM +0800, Wei Yongjun wrote: > From: Wei Yongjun <yongjun_wei@xxxxxxxxxxxxxxxxx> > > In case of error, the function clk_get_parent() and devm_ioremap_resource() > returns ERR_PTR() and never returns NULL. The NULL test in the return value > check should be replaced with IS_ERR(). > > Signed-off-by: Wei Yongjun <yongjun_wei@xxxxxxxxxxxxxxxxx> > --- > drivers/gpu/drm/tegra/dsi.c | 6 +++--- > 1 file changed, 3 insertions(+), 3 deletions(-) I've applied this, but with the first hunk removed, since looking at the implementation of clk_get_parent() it can actually return NULL. In fact it seems like it will never return ERR_PTR(). I've also updated the commit message to reflect that. Thierry > > diff --git a/drivers/gpu/drm/tegra/dsi.c b/drivers/gpu/drm/tegra/dsi.c > index 1cfbace..7bc2eeb 100644 > --- a/drivers/gpu/drm/tegra/dsi.c > +++ b/drivers/gpu/drm/tegra/dsi.c > @@ -914,7 +914,7 @@ static int tegra_dsi_setup_clocks(struct tegra_dsi *dsi) > int err; > > parent = clk_get_parent(dsi->clk); > - if (!parent) > + if (IS_ERR(parent)) > return -EINVAL; > > err = clk_set_parent(parent, dsi->clk_parent); > @@ -969,8 +969,8 @@ static int tegra_dsi_probe(struct platform_device *pdev) > > regs = platform_get_resource(pdev, IORESOURCE_MEM, 0); > dsi->regs = devm_ioremap_resource(&pdev->dev, regs); > - if (!dsi->regs) > - return -EADDRNOTAVAIL; > + if (IS_ERR(dsi->regs)) > + return PTR_ERR(dsi->regs); > > INIT_LIST_HEAD(&dsi->client.list); > dsi->client.ops = &dsi_client_ops; >
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