From: Tom Yan <tom.ty89@xxxxxxxxx> scsi_done() was called repeatedly and apparently because of that, the kernel would call trace when we touch the Control mode page: Call Trace: [<ffffffff812ea0d2>] dump_stack+0x63/0x81 [<ffffffff81079cfb>] __warn+0xcb/0xf0 [<ffffffff81079e2d>] warn_slowpath_null+0x1d/0x20 [<ffffffffa00f51b0>] ata_eh_finish+0xe0/0xf0 [libata] [<ffffffffa00fb830>] sata_pmp_error_handler+0x640/0xa50 [libata] [<ffffffffa00470ed>] ahci_error_handler+0x1d/0x70 [libahci] [<ffffffffa00f55f0>] ata_scsi_port_error_handler+0x430/0x770 [libata] [<ffffffffa00eff8d>] ? ata_scsi_cmd_error_handler+0xdd/0x160 [libata] [<ffffffffa00f59d7>] ata_scsi_error+0xa7/0xf0 [libata] [<ffffffffa00913ba>] scsi_error_handler+0xaa/0x560 [scsi_mod] [<ffffffffa0091310>] ? scsi_eh_get_sense+0x180/0x180 [scsi_mod] [<ffffffff81098eb8>] kthread+0xd8/0xf0 [<ffffffff815d913f>] ret_from_fork+0x1f/0x40 [<ffffffff81098de0>] ? kthread_worker_fn+0x170/0x170 ---[ end trace 8b7501047e928a17 ]--- Removed the unnecessary code and let ata_scsi_translate() do the job. Also, since ata_mselect_control() has no ATA command to send to the device, ata_scsi_mode_select_xlat() should return 1 for it, so that ata_scsi_translate() will finish early to avoid ata_qc_issue(). Signed-off-by: Tom Yan <tom.ty89@xxxxxxxxx> diff --git a/drivers/ata/libata-scsi.c b/drivers/ata/libata-scsi.c index 6c424c5..f5c4200 100644 --- a/drivers/ata/libata-scsi.c +++ b/drivers/ata/libata-scsi.c @@ -3720,8 +3720,6 @@ static int ata_mselect_control(struct ata_queued_cmd *qc, dev->flags |= ATA_DFLAG_D_SENSE; else dev->flags &= ~ATA_DFLAG_D_SENSE; - qc->scsicmd->result = SAM_STAT_GOOD; - qc->scsicmd->scsi_done(qc->scsicmd); return 0; } @@ -3854,6 +3852,8 @@ static unsigned int ata_scsi_mode_select_xlat(struct ata_queued_cmd *qc) if (ata_mselect_control(qc, p, pg_len, &fp) < 0) { fp += hdr_len + bd_len; goto invalid_param; + } else { + goto skip; /* No ATA command to send */ } break; default: /* invalid page code */ -- 2.9.0 -- 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