From aba5a85c2fcf05a6922e28c7179526adad58f4b5 Mon Sep 17 00:00:00 2001 From: Sreekanth Reddy Date: Tue, 10 Oct 2017 18:41:21 +0530 Subject: [PATCH] scsi: mpt3sas: Fix possibility of using invalid Enclosure Handle for SAS device after host reset Enclosure handles are not updated after host reset. As a result, driver device structure is holding previously assigned enclosure handle which is different from the enclosure handle populated in the corresponding device page. Modified the driver to update devices enclosure handles after host reset to current value by referring the enclosure handles from corresponding device pages Signed-off-by: Sreekanth Reddy Reviewed-by: Tomas Henzl Signed-off-by: Martin K. Petersen --- drivers/scsi/mpt3sas/mpt3sas_scsih.c | 117 ++++++++++++++++++++++++----------- 1 file changed, 81 insertions(+), 36 deletions(-) diff --git a/drivers/scsi/mpt3sas/mpt3sas_scsih.c b/drivers/scsi/mpt3sas/mpt3sas_scsih.c index cf1af9c..ea1647a 100644 --- a/drivers/scsi/mpt3sas/mpt3sas_scsih.c +++ b/drivers/scsi/mpt3sas/mpt3sas_scsih.c @@ -5383,6 +5383,52 @@ _scsih_check_access_status(struct MPT3SAS_ADAPTER *ioc, u64 sas_address, } /** + * _scsih_get_enclosure_logicalid_chassis_slot - get device's + * EnclosureLogicalID and ChassisSlot information. + * @ioc: per adapter object + * @sas_device_pg0: SAS device page0 + * @sas_device: per sas device object + * + * Returns nothing. + */ +static void +_scsih_get_enclosure_logicalid_chassis_slot(struct MPT3SAS_ADAPTER *ioc, + Mpi2SasDevicePage0_t *sas_device_pg0, struct _sas_device *sas_device) +{ + Mpi2ConfigReply_t mpi_reply; + Mpi2SasEnclosurePage0_t enclosure_pg0; + + if (!sas_device_pg0 || !sas_device) + return; + + sas_device->enclosure_handle = + le16_to_cpu(sas_device_pg0->EnclosureHandle); + sas_device->is_chassis_slot_valid = 0; + + if (!le16_to_cpu(sas_device_pg0->EnclosureHandle)) + return; + + if (mpt3sas_config_get_enclosure_pg0(ioc, &mpi_reply, + &enclosure_pg0, MPI2_SAS_ENCLOS_PGAD_FORM_HANDLE, + le16_to_cpu(sas_device_pg0->EnclosureHandle))) { + pr_err(MPT3SAS_FMT + "Enclosure Pg0 read failed for handle(0x%04x)\n", + ioc->name, le16_to_cpu(sas_device_pg0->EnclosureHandle)); + return; + } + + sas_device->enclosure_logical_id = + le64_to_cpu(enclosure_pg0.EnclosureLogicalID); + + if (le16_to_cpu(enclosure_pg0.Flags) & + MPI2_SAS_ENCLS0_FLAGS_CHASSIS_SLOT_VALID) { + sas_device->is_chassis_slot_valid = 1; + sas_device->chassis_slot = enclosure_pg0.ChassisSlot; + } +} + + +/** * _scsih_check_device - checking device responsiveness * @ioc: per adapter object * @parent_sas_address: sas address of parent expander or sas host @@ -5398,7 +5444,6 @@ _scsih_check_device(struct MPT3SAS_ADAPTER *ioc, { Mpi2ConfigReply_t mpi_reply; Mpi2SasDevicePage0_t sas_device_pg0; - Mpi2SasEnclosurePage0_t enclosure_pg0; struct _sas_device *sas_device; u32 ioc_status; unsigned long flags; @@ -5407,7 +5452,6 @@ _scsih_check_device(struct MPT3SAS_ADAPTER *ioc, struct MPT3SAS_TARGET *sas_target_priv_data; u32 device_info; - if ((mpt3sas_config_get_sas_device_pg0(ioc, &mpi_reply, &sas_device_pg0, MPI2_SAS_DEVICE_PGAD_FORM_HANDLE, handle))) return; @@ -5454,18 +5498,9 @@ _scsih_check_device(struct MPT3SAS_ADAPTER *ioc, sas_device->enclosure_level = 0; sas_device->connector_name[0] = '\0'; } - sas_device->is_chassis_slot_valid = 0; - if (sas_device->enclosure_handle && - !(mpt3sas_config_get_enclosure_pg0(ioc, &mpi_reply, - &enclosure_pg0, MPI2_SAS_ENCLOS_PGAD_FORM_HANDLE, - sas_device->enclosure_handle))) { - if (le16_to_cpu(enclosure_pg0.Flags) & - MPI2_SAS_ENCLS0_FLAGS_CHASSIS_SLOT_VALID) { - sas_device->is_chassis_slot_valid = 1; - sas_device->chassis_slot = - enclosure_pg0.ChassisSlot; - } - } + + _scsih_get_enclosure_logicalid_chassis_slot(ioc, + &sas_device_pg0, sas_device); } /* check if device is present */ @@ -7088,10 +7123,8 @@ Mpi2SasDevicePage0_t *sas_device_pg0) { struct MPT3SAS_TARGET *sas_target_priv_data = NULL; struct scsi_target *starget; - struct _sas_device *sas_device; + struct _sas_device *sas_device = NULL; unsigned long flags; - Mpi2SasEnclosurePage0_t enclosure_pg0; - Mpi2ConfigReply_t mpi_reply; spin_lock_irqsave(&ioc->sas_device_lock, flags); list_for_each_entry(sas_device, &ioc->sas_device_list, list) { @@ -7131,18 +7164,8 @@ Mpi2SasDevicePage0_t *sas_device_pg0) sas_device->connector_name[0] = '\0'; } - sas_device->is_chassis_slot_valid = 0; - if (sas_device->enclosure_handle && - !(mpt3sas_config_get_enclosure_pg0(ioc, &mpi_reply, - &enclosure_pg0, MPI2_SAS_ENCLOS_PGAD_FORM_HANDLE, - sas_device->enclosure_handle))) { - if (le16_to_cpu(enclosure_pg0.Flags) & - MPI2_SAS_ENCLS0_FLAGS_CHASSIS_SLOT_VALID) { - sas_device->is_chassis_slot_valid = 1; - sas_device->chassis_slot = - enclosure_pg0.ChassisSlot; - } - } + _scsih_get_enclosure_logicalid_chassis_slot(ioc, + sas_device_pg0, sas_device); if (sas_device->handle == sas_device_pg0->DevHandle) goto out; @@ -7340,8 +7363,7 @@ _scsih_search_responding_raid_devices(struct MPT3SAS_ADAPTER *ioc) /** * _scsih_mark_responding_expander - mark a expander as responding * @ioc: per adapter object - * @sas_address: sas address - * @handle: + * @expander_pg0:SAS Expander Config Page0 * * After host reset, find out whether devices are still responding. * Used in _scsih_remove_unresponsive_expanders. @@ -7349,18 +7371,41 @@ _scsih_search_responding_raid_devices(struct MPT3SAS_ADAPTER *ioc) * Return nothing. */ static void -_scsih_mark_responding_expander(struct MPT3SAS_ADAPTER *ioc, u64 sas_address, - u16 handle) +_scsih_mark_responding_expander(struct MPT3SAS_ADAPTER *ioc, + Mpi2ExpanderPage0_t *expander_pg0) { - struct _sas_node *sas_expander; + struct _sas_node *sas_expander = NULL; unsigned long flags; - int i; + int i, encl_pg0_rc = -1; + Mpi2ConfigReply_t mpi_reply; + Mpi2SasEnclosurePage0_t enclosure_pg0; + u16 handle = le16_to_cpu(expander_pg0->DevHandle); + u64 sas_address = le64_to_cpu(expander_pg0->SASAddress); + + if (le16_to_cpu(expander_pg0->EnclosureHandle)) { + encl_pg0_rc = mpt3sas_config_get_enclosure_pg0(ioc, &mpi_reply, + &enclosure_pg0, MPI2_SAS_ENCLOS_PGAD_FORM_HANDLE, + le16_to_cpu(expander_pg0->EnclosureHandle)); + if (encl_pg0_rc) + pr_info(MPT3SAS_FMT + "Enclosure Pg0 read failed for handle(0x%04x)\n", + ioc->name, + le16_to_cpu(expander_pg0->EnclosureHandle)); + } spin_lock_irqsave(&ioc->sas_node_lock, flags); list_for_each_entry(sas_expander, &ioc->sas_expander_list, list) { if (sas_expander->sas_address != sas_address) continue; sas_expander->responding = 1; + + if (!encl_pg0_rc) + sas_expander->enclosure_logical_id = + le64_to_cpu(enclosure_pg0.EnclosureLogicalID); + + sas_expander->enclosure_handle = + le16_to_cpu(expander_pg0->EnclosureHandle); + if (sas_expander->handle == handle) goto out; pr_info("\texpander(0x%016llx): handle changed" \ @@ -7413,7 +7458,7 @@ _scsih_search_responding_expanders(struct MPT3SAS_ADAPTER *ioc) pr_info("\texpander present: handle(0x%04x), sas_addr(0x%016llx)\n", handle, (unsigned long long)sas_address); - _scsih_mark_responding_expander(ioc, sas_address, handle); + _scsih_mark_responding_expander(ioc, &expander_pg0); } out: -- 2.7.4