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[SCSI] megaraid_sas: Update balance count in driver to be in sync of firmware 

Signed-off-by: Sumit Saxena <sumit.saxena@lsi.com>
Signed-off-by: Kashyap Desai <kashyap.desai@lsi.com>
Signed-off-by: James Bottomley <JBottomley@Parallels.com>
This commit is contained in:
Sumit.Saxena@lsi.com 2013-05-22 12:30:22 +05:30 committed by James Bottomley
parent b5bccadd80
commit 70b47b881e
1 changed files with 3 additions and 2 deletions
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5
drivers/scsi/megaraid/megaraid_sas_fp.c
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@ -503,8 +503,9 @@ u8 megasas_get_best_arm(struct LD_LOAD_BALANCE_INFO *lbInfo, u8 arm, u64 block,
diff1 = ABS_DIFF(block, lbInfo->last_accessed_block[1]);
bestArm = (diff0 <= diff1 ? 0 : 1);
if ((bestArm == arm && pend0 > pend1 + 16) ||
(bestArm != arm && pend1 > pend0 + 16))
/*Make balance count from 16 to 4 to keep driver in sync with Firmware*/
if ((bestArm == arm && pend0 > pend1 + 4) ||
(bestArm != arm && pend1 > pend0 + 4))
bestArm ^= 1;
/* Update the last accessed block on the correct pd */