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How important is the name argument to request_mem_region?

devm_request_and_ioremap uses:

name = res->name ?: dev_name(dev);

In trying to introduce uses of devm_request_and_ioremap I thus look for
res->name and dev_name(dev) as well as the name in the driver structure in
the platform_driver structure. But sometimes the name is pdev->name, ie
the name field of the argument to the probe function. And sometimes it is
a string that is slightly different than what is in the driver structure.


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