At Tue, 19 May 2015 10:26:46 -0400 (EDT), Alan Stern wrote: > > > > > Of just have request_firmware() > > > > actually sleep until userspace is ready. Seriously, why is > > > > request_firmware not just sleeping for us. > > It won't work. The request_firmware call is part of the probe > sequence, which in turn is part of the resume sequence. Userspace > doesn't start running again until the resume sequence is finished. If > request_firmware waited for userspace, it would hang.
Note that the recent request_firmware() doesn't need the user-space invocation (unless the fallback is explicitly enabled) but loads the file directly. And, request_firmware() for the cached data is valid to be called in the resume path. Takashi -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majord...@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
