Commits
Zhou Zhengping committed 4ff7adc8c78
scsi: Skip deleted devices in __scsi_device_lookup When a device is unplugged from a SCSI controller, if the scsi_device is still in use by application layer, it won't get released until users close it. In this case, scsi_device_remove just set the scsi_device's state to be SDEV_DEL. But if you plug the disk just before the old scsi_device is released, then there will be two scsi_device structures in scsi_host->__devices. When the next unplug event happens, some low-level drivers will check whether the scsi_device has been added to host (for example the MegaRAID SAS series controller) by calling scsi_device_lookup(call __scsi_device_lookup) in function megasas_aen_polling. __scsi_device_lookup will return the first scsi_device. Because its state is SDEV_DEL, the scsi_device_lookup will return NULL, making the low-level driver assume that the scsi_device has been removed, and won't call scsi_device_remove which will lead to hot swap failure. Signed-off-by: Zhou Zhengping <johnzzpcrystal@gmail.com> Tested-by: Zeng Rujia <ZengRujia@sangfor.com.cn> Bugzilla: https://bugzilla.kernel.org/show_bug.cgi?id=195607 Reviewed-by: Hannes Reinecke <hare@suse.com> Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>