When the driver reads state values from the hw it might happen that different values are read in subsequent reads and this can cause problems, this may lead to a timeout in this function and a non working adapter.
Cc: Adam Radford <[email protected]> Signed-off-by: Tomas Henzl <[email protected]> Reviewed-by: Shintaro Minemoto <[email protected]> Acked-by: Sumit Saxena <[email protected]> --- drivers/scsi/megaraid/megaraid_sas_base.c | 15 +++++++-------- 1 file changed, 7 insertions(+), 8 deletions(-) diff --git a/drivers/scsi/megaraid/megaraid_sas_base.c b/drivers/scsi/megaraid/megaraid_sas_base.c index dc27598..1153ac4 100644 --- a/drivers/scsi/megaraid/megaraid_sas_base.c +++ b/drivers/scsi/megaraid/megaraid_sas_base.c @@ -2626,7 +2626,8 @@ megasas_transition_to_ready(struct megasas_instance *instance, int ocr) u32 cur_state; u32 abs_state, curr_abs_state; - fw_state = instance->instancet->read_fw_status_reg(instance->reg_set) & MFI_STATE_MASK; + abs_state = instance->instancet->read_fw_status_reg(instance->reg_set); + fw_state = abs_state & MFI_STATE_MASK; if (fw_state != MFI_STATE_READY) printk(KERN_INFO "megasas: Waiting for FW to come to ready" @@ -2634,9 +2635,6 @@ megasas_transition_to_ready(struct megasas_instance *instance, int ocr) while (fw_state != MFI_STATE_READY) { - abs_state = - instance->instancet->read_fw_status_reg(instance->reg_set); - switch (fw_state) { case MFI_STATE_FAULT: @@ -2772,10 +2770,8 @@ megasas_transition_to_ready(struct megasas_instance *instance, int ocr) * The cur_state should not last for more than max_wait secs */ for (i = 0; i < (max_wait * 1000); i++) { - fw_state = instance->instancet->read_fw_status_reg(instance->reg_set) & - MFI_STATE_MASK ; - curr_abs_state = - instance->instancet->read_fw_status_reg(instance->reg_set); + curr_abs_state = instance->instancet-> + read_fw_status_reg(instance->reg_set); if (abs_state == curr_abs_state) { msleep(1); @@ -2791,6 +2787,9 @@ megasas_transition_to_ready(struct megasas_instance *instance, int ocr) "in %d secs\n", fw_state, max_wait); return -ENODEV; } + + abs_state = curr_abs_state; + fw_state = curr_abs_state & MFI_STATE_MASK; } printk(KERN_INFO "megasas: FW now in Ready state\n"); -- 1.8.3.1 -- To unsubscribe from this list: send the line "unsubscribe linux-scsi" in the body of a message to [email protected] More majordomo info at http://vger.kernel.org/majordomo-info.html
