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ARM: cleanup: OMAP hwmod error checking 

omap_hwmod_lookup() only returns NULL on error, never an error pointer.
Checking the returned pointer using IS_ERR_OR_NULL() is needless
overhead.  Use a simple !ptr check instead.

OMAP devices (oh->od) always have a valid platform device attached (see
omap_device_alloc()) so there's no point validating the platform device
pointer (we will have already oopsed long before if this is not the
case here.)

Lastly, oh->od is only ever NULL or a valid omap device pointer - 'oh'
comes from the statically declared hwmod tables, and the pointer is
only filled in by omap_device_alloc() at a point where the omap device
pointer must be valid.

Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
This commit is contained in:
Russell King 2013-02-24 10:56:59 +00:00
parent 62f0f39b4a
commit 4d485661d7
1 changed files with 4 additions and 7 deletions
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11
arch/arm/mach-omap2/omap_device.c
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@ -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);