| Message ID | 20200818143952.50752-1-yuehaibing@huawei.com |
|---|---|
| State | Changes Requested |
| Delegated to: | David Miller |
| Headers | show |
| Series | net: stmmac: Fix signedness bug in stmmac_probe_config_dt() | expand |
On Aug 18 2020, YueHaibing wrote: > The "plat->phy_interface" variable is an enum and in this context GCC > will treat it as an unsigned int so the error handling is never > triggered. > > Fixes: b9f0b2f634c0 ("net: stmmac: platform: fix probe for ACPI devices") > Signed-off-by: YueHaibing <yuehaibing@huawei.com> > --- > drivers/net/ethernet/stmicro/stmmac/stmmac_platform.c | 2 +- > 1 file changed, 1 insertion(+), 1 deletion(-) > > diff --git a/drivers/net/ethernet/stmicro/stmmac/stmmac_platform.c b/drivers/net/ethernet/stmicro/stmmac/stmmac_platform.c > index f32317fa75c8..b5b558b02e7d 100644 > --- a/drivers/net/ethernet/stmicro/stmmac/stmmac_platform.c > +++ b/drivers/net/ethernet/stmicro/stmmac/stmmac_platform.c > @@ -413,7 +413,7 @@ stmmac_probe_config_dt(struct platform_device *pdev, const char **mac) > } > > plat->phy_interface = device_get_phy_mode(&pdev->dev); > - if (plat->phy_interface < 0) > + if ((int)plat->phy_interface < 0) > return ERR_PTR(plat->phy_interface); I don't think the conversion to long when passed to ERR_PTR will produce a negative value either (if long is wider than unsigned int). Andreas.
On 2020/8/18 22:51, Andreas Schwab wrote: > On Aug 18 2020, YueHaibing wrote: > >> The "plat->phy_interface" variable is an enum and in this context GCC >> will treat it as an unsigned int so the error handling is never >> triggered. >> >> Fixes: b9f0b2f634c0 ("net: stmmac: platform: fix probe for ACPI devices") >> Signed-off-by: YueHaibing <yuehaibing@huawei.com> >> --- >> drivers/net/ethernet/stmicro/stmmac/stmmac_platform.c | 2 +- >> 1 file changed, 1 insertion(+), 1 deletion(-) >> >> diff --git a/drivers/net/ethernet/stmicro/stmmac/stmmac_platform.c b/drivers/net/ethernet/stmicro/stmmac/stmmac_platform.c >> index f32317fa75c8..b5b558b02e7d 100644 >> --- a/drivers/net/ethernet/stmicro/stmmac/stmmac_platform.c >> +++ b/drivers/net/ethernet/stmicro/stmmac/stmmac_platform.c >> @@ -413,7 +413,7 @@ stmmac_probe_config_dt(struct platform_device *pdev, const char **mac) >> } >> >> plat->phy_interface = device_get_phy_mode(&pdev->dev); >> - if (plat->phy_interface < 0) >> + if ((int)plat->phy_interface < 0) >> return ERR_PTR(plat->phy_interface); > > I don't think the conversion to long when passed to ERR_PTR will produce > a negative value either (if long is wider than unsigned int). Thanks, will respin. > > Andreas. >
diff --git a/drivers/net/ethernet/stmicro/stmmac/stmmac_platform.c b/drivers/net/ethernet/stmicro/stmmac/stmmac_platform.c index f32317fa75c8..b5b558b02e7d 100644 --- a/drivers/net/ethernet/stmicro/stmmac/stmmac_platform.c +++ b/drivers/net/ethernet/stmicro/stmmac/stmmac_platform.c @@ -413,7 +413,7 @@ stmmac_probe_config_dt(struct platform_device *pdev, const char **mac) } plat->phy_interface = device_get_phy_mode(&pdev->dev); - if (plat->phy_interface < 0) + if ((int)plat->phy_interface < 0) return ERR_PTR(plat->phy_interface); plat->interface = stmmac_of_get_mac_mode(np);
The "plat->phy_interface" variable is an enum and in this context GCC will treat it as an unsigned int so the error handling is never triggered. Fixes: b9f0b2f634c0 ("net: stmmac: platform: fix probe for ACPI devices") Signed-off-by: YueHaibing <yuehaibing@huawei.com> --- drivers/net/ethernet/stmicro/stmmac/stmmac_platform.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-)