On Fri, Jul 22, 2016 at 02:41:54AM +0800, tom.ty89@xxxxxxxxx wrote: > 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> Applied to libata/for-4.9. Thanks. -- tejun -- To unsubscribe from this list: send the line "unsubscribe linux-next" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
