diff options
| author | Ching Huang <ching2048@areca.com.tw> | 2014-08-19 08:29:41 +0200 |
|---|---|---|
| committer | Christoph Hellwig <hch@lst.de> | 2014-09-16 18:39:34 +0200 |
| commit | 3df824aff935444601101cc329ebe3f52e126a4e (patch) | |
| tree | 65d46e5879f6e012e528fef4f03f273365dc474f /drivers/scsi/arcmsr | |
| parent | arcmsr: add code to support hibernation (diff) | |
| download | linux-3df824aff935444601101cc329ebe3f52e126a4e.tar.xz linux-3df824aff935444601101cc329ebe3f52e126a4e.zip | |
arcmsr: limit max. number of SCSI command request
This patch limits the max. number of SCSI commmand request to avoid command
overflow.
Signed-off-by: Ching Huang <ching2048@areca.com.tw>
Reviewed-by: Tomas Henzl <thenzl@redhat.com>
Signed-off-by: Christoph Hellwig <hch@lst.de>
Diffstat (limited to 'drivers/scsi/arcmsr')
| -rw-r--r-- | drivers/scsi/arcmsr/arcmsr.h | 4 | ||||
| -rw-r--r-- | drivers/scsi/arcmsr/arcmsr_hba.c | 32 |
2 files changed, 25 insertions, 11 deletions
diff --git a/drivers/scsi/arcmsr/arcmsr.h b/drivers/scsi/arcmsr/arcmsr.h index 1c64b60a3dcf..0ae0ce31bb46 100644 --- a/drivers/scsi/arcmsr/arcmsr.h +++ b/drivers/scsi/arcmsr/arcmsr.h @@ -45,11 +45,12 @@ #include <linux/interrupt.h> struct device_attribute; /*The limit of outstanding scsi command that firmware can handle*/ -#define ARCMSR_MAX_OUTSTANDING_CMD 256 #ifdef CONFIG_XEN #define ARCMSR_MAX_FREECCB_NUM 160 +#define ARCMSR_MAX_OUTSTANDING_CMD 155 #else #define ARCMSR_MAX_FREECCB_NUM 320 +#define ARCMSR_MAX_OUTSTANDING_CMD 255 #endif #define ARCMSR_DRIVER_VERSION "v1.30.00.04-20140428" #define ARCMSR_SCSI_INITIATOR_ID 255 @@ -598,6 +599,7 @@ struct AdapterControlBlock #define FW_DEADLOCK 0x0010 atomic_t rq_map_token; atomic_t ante_token_value; + uint32_t maxOutstanding; int msix_vector_count; };/* HW_DEVICE_EXTENSION */ /* diff --git a/drivers/scsi/arcmsr/arcmsr_hba.c b/drivers/scsi/arcmsr/arcmsr_hba.c index b338a3b05549..ed61ee283a61 100644 --- a/drivers/scsi/arcmsr/arcmsr_hba.c +++ b/drivers/scsi/arcmsr/arcmsr_hba.c @@ -134,7 +134,7 @@ static struct scsi_host_template arcmsr_scsi_host_template = { .eh_bus_reset_handler = arcmsr_bus_reset, .bios_param = arcmsr_bios_param, .change_queue_depth = arcmsr_adjust_disk_queue_depth, - .can_queue = ARCMSR_MAX_FREECCB_NUM, + .can_queue = ARCMSR_MAX_OUTSTANDING_CMD, .this_id = ARCMSR_SCSI_INITIATOR_ID, .sg_tablesize = ARCMSR_DEFAULT_SG_ENTRIES, .max_sectors = ARCMSR_MAX_XFER_SECTORS_C, @@ -693,7 +693,7 @@ static int arcmsr_probe(struct pci_dev *pdev, const struct pci_device_id *id) host->max_lun = ARCMSR_MAX_TARGETLUN; host->max_id = ARCMSR_MAX_TARGETID; /*16:8*/ host->max_cmd_len = 16; /*this is issue of 64bit LBA ,over 2T byte*/ - host->can_queue = ARCMSR_MAX_FREECCB_NUM; /* max simultaneous cmds */ + host->can_queue = ARCMSR_MAX_OUTSTANDING_CMD; host->cmd_per_lun = ARCMSR_MAX_CMD_PERLUN; host->this_id = ARCMSR_SCSI_INITIATOR_ID; host->unique_id = (bus << 8) | dev_fun; @@ -2216,9 +2216,6 @@ static int arcmsr_queue_command_lck(struct scsi_cmnd *cmd, arcmsr_handle_virtual_command(acb, cmd); return 0; } - if (atomic_read(&acb->ccboutstandingcount) >= - ARCMSR_MAX_OUTSTANDING_CMD) - return SCSI_MLQUEUE_HOST_BUSY; ccb = arcmsr_get_freeccb(acb); if (!ccb) return SCSI_MLQUEUE_HOST_BUSY; @@ -2428,12 +2425,27 @@ static bool arcmsr_get_hbc_config(struct AdapterControlBlock *pACB) } static bool arcmsr_get_firmware_spec(struct AdapterControlBlock *acb) { - if (acb->adapter_type == ACB_ADAPTER_TYPE_A) - return arcmsr_get_hba_config(acb); - else if (acb->adapter_type == ACB_ADAPTER_TYPE_B) - return arcmsr_get_hbb_config(acb); + bool rtn = false; + + switch (acb->adapter_type) { + case ACB_ADAPTER_TYPE_A: + rtn = arcmsr_get_hba_config(acb); + break; + case ACB_ADAPTER_TYPE_B: + rtn = arcmsr_get_hbb_config(acb); + break; + case ACB_ADAPTER_TYPE_C: + rtn = arcmsr_get_hbc_config(acb); + break; + default: + break; + } + if (acb->firm_numbers_queue > ARCMSR_MAX_OUTSTANDING_CMD) + acb->maxOutstanding = ARCMSR_MAX_OUTSTANDING_CMD; else - return arcmsr_get_hbc_config(acb); + acb->maxOutstanding = acb->firm_numbers_queue - 1; + acb->host->can_queue = acb->maxOutstanding; + return rtn; } static int arcmsr_polling_hba_ccbdone(struct AdapterControlBlock *acb, |