diff options
Diffstat (limited to 'drivers/scsi/mpt3sas/mpt3sas_base.c')
| -rw-r--r-- | drivers/scsi/mpt3sas/mpt3sas_base.c | 30 |
1 files changed, 30 insertions, 0 deletions
diff --git a/drivers/scsi/mpt3sas/mpt3sas_base.c b/drivers/scsi/mpt3sas/mpt3sas_base.c index 9254b527faa1..d371c8e344d5 100644 --- a/drivers/scsi/mpt3sas/mpt3sas_base.c +++ b/drivers/scsi/mpt3sas/mpt3sas_base.c @@ -157,6 +157,32 @@ module_param_call(mpt3sas_fwfault_debug, _scsih_set_fwfault_debug, param_get_int, &mpt3sas_fwfault_debug, 0644); /** + * _base_readl_aero - retry readl for max three times. + * @addr - MPT Fusion system interface register address + * + * Retry the readl() for max three times if it gets zero value + * while reading the system interface register. + */ +static inline u32 +_base_readl_aero(const volatile void __iomem *addr) +{ + u32 i = 0, ret_val; + + do { + ret_val = readl(addr); + i++; + } while (ret_val == 0 && i < 3); + + return ret_val; +} + +static inline u32 +_base_readl(const volatile void __iomem *addr) +{ + return readl(addr); +} + +/** * _base_clone_reply_to_sys_mem - copies reply to reply free iomem * in BAR0 space. * @@ -6398,6 +6424,10 @@ mpt3sas_base_attach(struct MPT3SAS_ADAPTER *ioc) ioc->rdpq_array_enable_assigned = 0; ioc->dma_mask = 0; + if (ioc->is_aero_ioc) + ioc->base_readl = &_base_readl_aero; + else + ioc->base_readl = &_base_readl; r = mpt3sas_base_map_resources(ioc); if (r) goto out_free_resources; |