[PATCH] Proposed removal of IS_ERR_OR_NULL() (was: Re: [PATCH 1/4] gpiolib: introduce descriptor-based GPIO interface)
Russell King - ARM Linux
linux at arm.linux.org.uk
Thu Jan 10 03:21:45 EST 2013
On Wed, Jan 09, 2013 at 11:09:23AM -0500, Nicolas Pitre wrote:
> On Wed, 9 Jan 2013, Russell King - ARM Linux wrote:
>
> > On Wed, Jan 09, 2013 at 10:27:53AM -0500, Nicolas Pitre wrote:
> > > Anyone with good coccinelle skills around to deal with the users?
> >
> > I'm not sure that's a solution.
>
> Well, I was thinking that coccinelle could handle the majority of the
> 354 users when the "fix" is obvious enough to be automated.
>
> That said, if we want people to fix their code, it is probably necessary
> to merge your patch right away so the warnings are actually being seen,
> and revert it right before the final v3.8 release if the remaining
> warnings are still too numerous. Repeat with next cycle.
Well, this is what I currently have for arch/arm thus far, and ooh look,
we save some lines of code too.
arch/arm/mach-integrator/integrator_ap.c | 4 +---
arch/arm/mach-integrator/integrator_cp.c | 5 +----
arch/arm/mach-omap2/omap_device.c | 11 ++++-------
arch/arm/mach-omap2/pm-debug.c | 6 +++---
arch/arm/mach-omap2/powerdomain.c | 2 +-
arch/arm/mach-tegra/board-harmony-pcie.c | 6 +++---
arch/arm/mach-tegra/tegra2_emc.c | 2 +-
arch/arm/mach-ux500/cpu.c | 3 +--
arch/arm/plat-omap/dmtimer.c | 4 ++--
9 files changed, 17 insertions(+), 26 deletions(-)
diff --git a/arch/arm/mach-integrator/integrator_ap.c b/arch/arm/mach-integrator/integrator_ap.c
index 11e2a41..251f54f 100644
--- a/arch/arm/mach-integrator/integrator_ap.c
+++ b/arch/arm/mach-integrator/integrator_ap.c
@@ -547,9 +547,7 @@ static void __init ap_init_of(void)
}
parent = soc_device_to_device(soc_dev);
-
- if (!IS_ERR_OR_NULL(parent))
- integrator_init_sysfs(parent, ap_sc_id);
+ integrator_init_sysfs(parent, ap_sc_id);
of_platform_populate(root, of_default_bus_match_table,
ap_auxdata_lookup, parent);
diff --git a/arch/arm/mach-integrator/integrator_cp.c b/arch/arm/mach-integrator/integrator_cp.c
index 7322838..3fadadf 100644
--- a/arch/arm/mach-integrator/integrator_cp.c
+++ b/arch/arm/mach-integrator/integrator_cp.c
@@ -371,10 +371,7 @@ static void __init intcp_init_of(void)
}
parent = soc_device_to_device(soc_dev);
-
- if (!IS_ERR_OR_NULL(parent))
- integrator_init_sysfs(parent, intcp_sc_id);
-
+ integrator_init_sysfs(parent, intcp_sc_id);
of_platform_populate(root, of_default_bus_match_table,
intcp_auxdata_lookup, parent);
}
diff --git a/arch/arm/mach-omap2/omap_device.c b/arch/arm/mach-omap2/omap_device.c
index e065daa..fabb32d 100644
--- a/arch/arm/mach-omap2/omap_device.c
+++ b/arch/arm/mach-omap2/omap_device.c
@@ -1157,20 +1157,17 @@ struct device *omap_device_get_by_hwmod_name(const char *oh_name)
}
oh = omap_hwmod_lookup(oh_name);
- if (IS_ERR_OR_NULL(oh)) {
+ if (!oh) {
WARN(1, "%s: no hwmod for %s\n", __func__,
oh_name);
- return ERR_PTR(oh ? PTR_ERR(oh) : -ENODEV);
+ return -ENODEV;
}
- if (IS_ERR_OR_NULL(oh->od)) {
+ if (!oh->od) {
WARN(1, "%s: no omap_device for %s\n", __func__,
oh_name);
- return ERR_PTR(oh->od ? PTR_ERR(oh->od) : -ENODEV);
+ return -ENODEV;
}
- if (IS_ERR_OR_NULL(oh->od->pdev))
- return ERR_PTR(oh->od->pdev ? PTR_ERR(oh->od->pdev) : -ENODEV);
-
return &oh->od->pdev->dev;
}
EXPORT_SYMBOL(omap_device_get_by_hwmod_name);
diff --git a/arch/arm/mach-omap2/pm-debug.c b/arch/arm/mach-omap2/pm-debug.c
index e2c291f..548547e 100644
--- a/arch/arm/mach-omap2/pm-debug.c
+++ b/arch/arm/mach-omap2/pm-debug.c
@@ -219,7 +219,7 @@ static int __init pwrdms_setup(struct powerdomain *pwrdm, void *dir)
return 0;
d = debugfs_create_dir(pwrdm->name, (struct dentry *)dir);
- if (!(IS_ERR_OR_NULL(d)))
+ if (d)
(void) debugfs_create_file("suspend", S_IRUGO|S_IWUSR, d,
(void *)pwrdm, &pwrdm_suspend_fops);
@@ -263,8 +263,8 @@ static int __init pm_dbg_init(void)
return 0;
d = debugfs_create_dir("pm_debug", NULL);
- if (IS_ERR_OR_NULL(d))
- return PTR_ERR(d);
+ if (!d)
+ return -EINVAL;
(void) debugfs_create_file("count", S_IRUGO,
d, (void *)DEBUG_FILE_COUNTERS, &debug_fops);
diff --git a/arch/arm/mach-omap2/powerdomain.c b/arch/arm/mach-omap2/powerdomain.c
index dea62a9..36a6918 100644
--- a/arch/arm/mach-omap2/powerdomain.c
+++ b/arch/arm/mach-omap2/powerdomain.c
@@ -1054,7 +1054,7 @@ bool pwrdm_can_ever_lose_context(struct powerdomain *pwrdm)
{
int i;
- if (IS_ERR_OR_NULL(pwrdm)) {
+ if (!pwrdm) {
pr_debug("powerdomain: %s: invalid powerdomain pointer\n",
__func__);
return 1;
diff --git a/arch/arm/mach-tegra/board-harmony-pcie.c b/arch/arm/mach-tegra/board-harmony-pcie.c
index 3cdc1bb..6d29e6a 100644
--- a/arch/arm/mach-tegra/board-harmony-pcie.c
+++ b/arch/arm/mach-tegra/board-harmony-pcie.c
@@ -56,9 +56,9 @@ int __init harmony_pcie_init(void)
gpio_direction_output(en_vdd_1v05, 1);
regulator = regulator_get(NULL, "vdd_ldo0,vddio_pex_clk");
- if (IS_ERR_OR_NULL(regulator)) {
- pr_err("%s: regulator_get failed: %d\n", __func__,
- (int)PTR_ERR(regulator));
+ if (IS_ERR(regulator)) {
+ err = PTR_ERR(regulator);
+ pr_err("%s: regulator_get failed: %d\n", __func__, err);
goto err_reg;
}
diff --git a/arch/arm/mach-tegra/tegra2_emc.c b/arch/arm/mach-tegra/tegra2_emc.c
index 837c7b9..844c8d2 100644
--- a/arch/arm/mach-tegra/tegra2_emc.c
+++ b/arch/arm/mach-tegra/tegra2_emc.c
@@ -276,7 +276,7 @@ static struct tegra_emc_pdata __devinit *tegra_emc_fill_pdata(struct platform_de
int i;
WARN_ON(pdev->dev.platform_data);
- BUG_ON(IS_ERR_OR_NULL(c));
+ BUG_ON(IS_ERR(c));
pdata = devm_kzalloc(&pdev->dev, sizeof(*pdata), GFP_KERNEL);
pdata->tables = devm_kzalloc(&pdev->dev, sizeof(*pdata->tables),
diff --git a/arch/arm/mach-ux500/cpu.c b/arch/arm/mach-ux500/cpu.c
index 721e7b4..e31c2b4 100644
--- a/arch/arm/mach-ux500/cpu.c
+++ b/arch/arm/mach-ux500/cpu.c
@@ -151,8 +151,7 @@ struct device * __init ux500_soc_device_init(const char *soc_id)
}
parent = soc_device_to_device(soc_dev);
- if (!IS_ERR_OR_NULL(parent))
- device_create_file(parent, &ux500_soc_attr);
+ device_create_file(parent, &ux500_soc_attr);
return parent;
}
diff --git a/arch/arm/plat-omap/dmtimer.c b/arch/arm/plat-omap/dmtimer.c
index d51b75b..c654bb8 100644
--- a/arch/arm/plat-omap/dmtimer.c
+++ b/arch/arm/plat-omap/dmtimer.c
@@ -140,7 +140,7 @@ static int omap_dm_timer_prepare(struct omap_dm_timer *timer)
*/
if (!(timer->capability & OMAP_TIMER_NEEDS_RESET)) {
timer->fclk = clk_get(&timer->pdev->dev, "fck");
- if (WARN_ON_ONCE(IS_ERR_OR_NULL(timer->fclk))) {
+ if (WARN_ON_ONCE(IS_ERR(timer->fclk))) {
timer->fclk = NULL;
dev_err(&timer->pdev->dev, ": No fclk handle.\n");
return -EINVAL;
@@ -500,7 +500,7 @@ int omap_dm_timer_set_source(struct omap_dm_timer *timer, int source)
}
parent = clk_get(&timer->pdev->dev, parent_name);
- if (IS_ERR_OR_NULL(parent)) {
+ if (IS_ERR(parent)) {
pr_err("%s: %s not found\n", __func__, parent_name);
return -EINVAL;
}
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