-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA512 On 01/06/2014 10:38 AM, Alan Stern wrote: > Indeed. I can't see any place where the SCSI or block layers > would stop the queue of a device when it gets runtime suspended. > Maybe some other layer is doing this. So I've stepped through it in qemu a good bit, and found some strange things. At the time that sd_resume_system is called, the host is still in the recovery state as a result of ata_port_resume, so this is why scsi_request_fn doesn't dispatch the request. It requeues it for after the eh finishes, but when the eh finishes and sets the state back to running, scsi_request_fn calls blk_peek_request, and it returns NULL rather than the requeued REQUEST SENSE. It's like the request is lost rather than having been requeued. -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.4.14 (GNU/Linux) Comment: Using GnuPG with Thunderbird - http://www.enigmail.net/ iQEcBAEBCgAGBQJSy2oiAAoJEI5FoCIzSKrwTu4H/RONbp4lsY5jfSCwRCB23W5q dn8ZmGDzUbjzEeq/DJzARlWdxYadepIDDUKLNVYW1eUrN0+sPLV8jIlDZZgg3dbm kh0MMPjB2sMbz1zgTQ0/7rZw7WQZfE/vwAo95QQD42FK+SsRMwMoLaN6GsZrikrT MXzDMXCRLqaow4kSPj7uonN5wlw+1Y5Sn5LJ/SdzPyz2JX/x0lk8zMekNC0i6/tF ooQymcRFdiDFhr9E6VKj3+TEpVH708zA9vVSjzIZ6KIUD8mA+r2d8pPUWSrjuSzC U9EVNmawGJMsq70Ql2I8+0J9csz8I3ijQjpfxhw7+V89Fx+t+AH901hYnNY8Qeo= =hCxT -----END PGP SIGNATURE----- -- To unsubscribe from this list: send the line "unsubscribe linux-ide" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
