Damien Le Moal f2b359e3a4 scsi: Do not attempt to rescan suspended devices ... [ Upstream commit ff48b37802 ] scsi_rescan_device() takes a scsi device lock before executing a device handler and device driver rescan methods. Waiting for the completion of any command issued to the device by these methods will thus be done with the device lock held. As a result, there is a risk of deadlocking within the power management code if scsi_rescan_device() is called to handle a device resume with the associated scsi device not yet resumed. Avoid such situation by checking that the target scsi device is in the running state, that is, fully capable of executing commands, before proceeding with the rescan and bailout returning -EWOULDBLOCK otherwise. With this error return, the caller can retry rescaning the device after a delay. The state check is done with the device lock held and is thus safe against incoming suspend power management operations. Fixes: 6aa0365a3c ("ata: libata-scsi: Avoid deadlock on rescan after device resume") Cc: stable@vger.kernel.org Signed-off-by: Damien Le Moal <dlemoal@kernel.org> Reviewed-by: Hannes Reinecke <hare@suse.de> Reviewed-by: Niklas Cassel <niklas.cassel@wdc.com> Tested-by: Geert Uytterhoeven <geert+renesas@glider.be> Reviewed-by: Martin K. Petersen <martin.petersen@oracle.com> Reviewed-by: Bart Van Assche <bvanassche@acm.org> Stable-dep-of: 8b4d9469d0 ("ata: libata-scsi: Fix delayed scsi_rescan_device() execution") Signed-off-by: Sasha Levin <sashal@kernel.org>		2023-10-10 22:00:35 +02:00
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fc	…
fc_frame.h	…
fcoe_sysfs.h	…
iscsi_if.h	…
iscsi_proto.h	…
iser.h	…
libfc.h	…
libfcoe.h	SCSI misc on 20220524	2022-05-25 19:09:48 -07:00
libiscsi.h	scsi: iscsi_tcp: Fix UAF during logout when accessing the shost ipaddress	2023-02-09 11:28:12 +01:00
libiscsi_tcp.h	…
libsas.h	scsi: libsas: Introduce struct smp_rps_resp	2022-06-10 13:08:06 -04:00
sas.h	scsi: libsas: Introduce struct smp_rps_resp	2022-06-10 13:08:06 -04:00
sas_ata.h	scsi: libsas: Add sas_ata_device_link_abort()	2023-05-11 23:03:20 +09:00
scsi.h	…
scsi_bsg_iscsi.h	…
scsi_cmnd.h	scsi: stex: Properly zero out the passthrough command structure	2022-09-25 14:15:03 -04:00
scsi_common.h	…
scsi_dbg.h	…
scsi_device.h	scsi: sd: Differentiate system and runtime start/stop management	2023-10-10 22:00:34 +02:00
scsi_devinfo.h	scsi: core: Add BLIST_NO_VPD_SIZE for some VDASD	2023-03-22 13:33:43 +01:00
scsi_dh.h	…
scsi_driver.h	…
scsi_eh.h	…
scsi_host.h	scsi: Do not attempt to rescan suspended devices	2023-10-10 22:00:35 +02:00
scsi_ioctl.h	…
scsi_proto.h	…
scsi_status.h	scsi: core: Remove useless host error codes	2022-09-06 22:05:59 -04:00
scsi_tcq.h	…
scsi_transport.h	…
scsi_transport_fc.h	…
scsi_transport_iscsi.h	scsi: iscsi: Fix multiple iSCSI session unbind events sent to userspace	2023-02-01 08:34:27 +01:00
scsi_transport_sas.h	…
scsi_transport_spi.h	…
scsi_transport_srp.h	…
scsicam.h	…
sg.h	…
srp.h	…
viosrp.h	…