| Message ID | 8263a8d0f87d595dd35efa5432d294d9f7b38719.1535507412.git.chunfeng.yun@mediatek.com (mailing list archive) |
|---|---|
| State | New, archived |
| Headers | show |
| Series | [v2] usb: core: phy: fix return value checking about devm_of_phy_get_by_index() | expand |
On Wed, Aug 29, 2018 at 10:10:48AM +0800, Chunfeng Yun wrote: > Use IS_ERR() instead of IS_ERR_OR_NULL() because devm_of_phy_get_by_index() > never return NULL value; > But still need ignore the error of -ENODEV, for more information, please > refer to: > [0] https://lkml.org/lkml/2018/4/19/88 > [1] https://patchwork.kernel.org/patch/10160181/ > > Signed-off-by: Chunfeng Yun <chunfeng.yun@mediatek.com> > --- > V2: keep the -ENODEV check > --- > drivers/usb/core/phy.c | 11 ++++------- > 1 file changed, 4 insertions(+), 7 deletions(-) > > diff --git a/drivers/usb/core/phy.c b/drivers/usb/core/phy.c > index 9879767..e3cc743 100644 > --- a/drivers/usb/core/phy.c > +++ b/drivers/usb/core/phy.c > @@ -23,14 +23,11 @@ static int usb_phy_roothub_add_phy(struct device *dev, int index, > struct list_head *list) > { > struct usb_phy_roothub *roothub_entry; > - struct phy *phy = devm_of_phy_get_by_index(dev, dev->of_node, index); > + struct phy *phy; > > - if (IS_ERR_OR_NULL(phy)) { > - if (!phy || PTR_ERR(phy) == -ENODEV) > - return 0; > - else > - return PTR_ERR(phy); > - } > + phy = devm_of_phy_get_by_index(dev, dev->of_node, index); > + if (IS_ERR(phy)) > + return (PTR_ERR(phy) == -ENODEV) ? 0 : PTR_ERR(phy); I prefer not to use the terse ternary operator in general, and especially so in this case where we are doing something unexpected (i.e. we want to highlight that the -ENODEV case is special). So please keep the current construct, and just replace IS_ERR_OR_NULL and drop the !phy test. I think separating the declaration and (non-trivial) initialisation of phy here is a good thing that can remain in the patch, even if it's arguable separate change. > > roothub_entry = devm_kzalloc(dev, sizeof(*roothub_entry), GFP_KERNEL); > if (!roothub_entry) Thanks, Johan
On Wed, 2018-08-29 at 10:30 +0200, Johan Hovold wrote: > On Wed, Aug 29, 2018 at 10:10:48AM +0800, Chunfeng Yun wrote: > > Use IS_ERR() instead of IS_ERR_OR_NULL() because devm_of_phy_get_by_index() > > never return NULL value; > > But still need ignore the error of -ENODEV, for more information, please > > refer to: > > [0] https://lkml.org/lkml/2018/4/19/88 > > [1] https://patchwork.kernel.org/patch/10160181/ > > > > Signed-off-by: Chunfeng Yun <chunfeng.yun@mediatek.com> > > --- > > V2: keep the -ENODEV check > > --- > > drivers/usb/core/phy.c | 11 ++++------- > > 1 file changed, 4 insertions(+), 7 deletions(-) > > > > diff --git a/drivers/usb/core/phy.c b/drivers/usb/core/phy.c > > index 9879767..e3cc743 100644 > > --- a/drivers/usb/core/phy.c > > +++ b/drivers/usb/core/phy.c > > @@ -23,14 +23,11 @@ static int usb_phy_roothub_add_phy(struct device *dev, int index, > > struct list_head *list) > > { > > struct usb_phy_roothub *roothub_entry; > > - struct phy *phy = devm_of_phy_get_by_index(dev, dev->of_node, index); > > + struct phy *phy; > > > > - if (IS_ERR_OR_NULL(phy)) { > > - if (!phy || PTR_ERR(phy) == -ENODEV) > > - return 0; > > - else > > - return PTR_ERR(phy); > > - } > > + phy = devm_of_phy_get_by_index(dev, dev->of_node, index); > > + if (IS_ERR(phy)) > > + return (PTR_ERR(phy) == -ENODEV) ? 0 : PTR_ERR(phy); > > I prefer not to use the terse ternary operator in general, and > especially so in this case where we are doing something unexpected (i.e. > we want to highlight that the -ENODEV case is special). > > So please keep the current construct, and just replace IS_ERR_OR_NULL > and drop the !phy test. > > I think separating the declaration and (non-trivial) initialisation of > phy here is a good thing that can remain in the patch, even if it's > arguable separate change. > Ok, thanks > > > > roothub_entry = devm_kzalloc(dev, sizeof(*roothub_entry), GFP_KERNEL); > > if (!roothub_entry) > > Thanks, > Johan
diff --git a/drivers/usb/core/phy.c b/drivers/usb/core/phy.c index 9879767..e3cc743 100644 --- a/drivers/usb/core/phy.c +++ b/drivers/usb/core/phy.c @@ -23,14 +23,11 @@ static int usb_phy_roothub_add_phy(struct device *dev, int index, struct list_head *list) { struct usb_phy_roothub *roothub_entry; - struct phy *phy = devm_of_phy_get_by_index(dev, dev->of_node, index); + struct phy *phy; - if (IS_ERR_OR_NULL(phy)) { - if (!phy || PTR_ERR(phy) == -ENODEV) - return 0; - else - return PTR_ERR(phy); - } + phy = devm_of_phy_get_by_index(dev, dev->of_node, index); + if (IS_ERR(phy)) + return (PTR_ERR(phy) == -ENODEV) ? 0 : PTR_ERR(phy); roothub_entry = devm_kzalloc(dev, sizeof(*roothub_entry), GFP_KERNEL); if (!roothub_entry)
Use IS_ERR() instead of IS_ERR_OR_NULL() because devm_of_phy_get_by_index() never return NULL value; But still need ignore the error of -ENODEV, for more information, please refer to: [0] https://lkml.org/lkml/2018/4/19/88 [1] https://patchwork.kernel.org/patch/10160181/ Signed-off-by: Chunfeng Yun <chunfeng.yun@mediatek.com> --- V2: keep the -ENODEV check --- drivers/usb/core/phy.c | 11 ++++------- 1 file changed, 4 insertions(+), 7 deletions(-)