hollalinux
/
linux-sg2042
mirror of https://github.com/sophgo/linux-riscv.git
1
0
Fork 0
Code Issues Packages Projects Releases Wiki Activity

megaraid_sas: fix a small problem when reading state value from hw 

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 <aradford@gmail.com>

Signed-off-by: Tomas Henzl <thenzl@redhat.com>
Reviewed-by: Shintaro Minemoto <fj3207hq@aa.jp.fujitsu.com>
Acked-by: Sumit Saxena <sumit.saxena@lsi.com>
Signed-off-by: Christoph Hellwig <hch@lst.de>
This commit is contained in:
Tomas Henzl 2014-04-01 13:59:50 +02:00 committed by Christoph Hellwig
parent d6d211db37
commit bc6ac5e8c2
1 changed files with 7 additions and 8 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

15
drivers/scsi/megaraid/megaraid_sas_base.c
View File

@ -3061,7 +3061,8 @@ 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"
@ -3069,9 +3070,6 @@ 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:
@ -3223,10 +3221,8 @@ 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);
@ -3242,6 +3238,9 @@ 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");