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megaraid_sas: endianness related bug fixes and code optimization

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This patch addresses below issues:

1) Few endianness bug fixes.
2) Break the iteration after (MAX_LOGICAL_DRIVES_EXT - 1)),
   instead of MAX_LOGICAL_DRIVES_EXT.
3) Optimization in MFI INIT frame before firing.
4) MFI IO frame should be 256bytes aligned.  Code is optimized to reduce
   the size of frame for fusion adapters and make the MFI frame size
   calculation a bit transparent and readable.

Cc: <stable@vger.kernel.org>
Signed-off-by: Kashyap Desai <kashyap.desai@avagotech.com>
Signed-off-by: Sumit Saxena <sumit.saxena@avagotech.com>
Signed-off-by: Chaitra Basappa <chaitra.basappa@avagotech.com>
Reviewed-by: Martin K. Petersen <martin.petersen@oracle.com>
Signed-off-by: Christoph Hellwig <hch@lst.de>
This commit is contained in:
Sumit.Saxena@avagotech.com
2015-01-05 20:05:58 +05:30
committed by Christoph Hellwig
parent 470613b462
commit 200aed582d
4 changed files with 24 additions and 30 deletions
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14
drivers/scsi/megaraid/megaraid_sas_fp.c
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@@ -172,6 +172,7 @@ void MR_PopulateDrvRaidMap(struct megasas_instance *instance)
struct MR_FW_RAID_MAP_ALL *fw_map_old = NULL;
struct MR_FW_RAID_MAP *pFwRaidMap = NULL;
int i;
u16 ld_count;
struct MR_DRV_RAID_MAP_ALL *drv_map =
@@ -191,9 +192,10 @@ void MR_PopulateDrvRaidMap(struct megasas_instance *instance)
fw_map_old = (struct MR_FW_RAID_MAP_ALL *)
fusion->ld_map[(instance->map_id & 1)];
pFwRaidMap = &fw_map_old->raidMap;
ld_count = (u16)le32_to_cpu(pFwRaidMap->ldCount);
#if VD_EXT_DEBUG
for (i = 0; i < le16_to_cpu(pFwRaidMap->ldCount); i++) {
for (i = 0; i < ld_count; i++) {
dev_dbg(&instance->pdev->dev, "(%d) :Index 0x%x "
"Target Id 0x%x Seq Num 0x%x Size 0/%llx\n",
instance->unique_id, i,
@@ -205,12 +207,12 @@ void MR_PopulateDrvRaidMap(struct megasas_instance *instance)
memset(drv_map, 0, fusion->drv_map_sz);
pDrvRaidMap->totalSize = pFwRaidMap->totalSize;
pDrvRaidMap->ldCount = (__le16)pFwRaidMap->ldCount;
pDrvRaidMap->ldCount = (__le16)cpu_to_le16(ld_count);
pDrvRaidMap->fpPdIoTimeoutSec = pFwRaidMap->fpPdIoTimeoutSec;
for (i = 0; i < MAX_RAIDMAP_LOGICAL_DRIVES + MAX_RAIDMAP_VIEWS; i++)
pDrvRaidMap->ldTgtIdToLd[i] =
(u8)pFwRaidMap->ldTgtIdToLd[i];
for (i = 0; i < le16_to_cpu(pDrvRaidMap->ldCount); i++) {
for (i = 0; i < ld_count; i++) {
pDrvRaidMap->ldSpanMap[i] = pFwRaidMap->ldSpanMap[i];
#if VD_EXT_DEBUG
dev_dbg(&instance->pdev->dev,
@@ -252,7 +254,7 @@ u8 MR_ValidateMapInfo(struct megasas_instance *instance)
struct LD_LOAD_BALANCE_INFO *lbInfo;
PLD_SPAN_INFO ldSpanInfo;
struct MR_LD_RAID *raid;
int ldCount, num_lds;
u16 ldCount, num_lds;
u16 ld;
u32 expected_size;
@@ -356,7 +358,7 @@ static int getSpanInfo(struct MR_DRV_RAID_MAP_ALL *map,
for (ldCount = 0; ldCount < MAX_LOGICAL_DRIVES_EXT; ldCount++) {
ld = MR_TargetIdToLdGet(ldCount, map);
if (ld >= MAX_LOGICAL_DRIVES_EXT)
if (ld >= (MAX_LOGICAL_DRIVES_EXT - 1))
continue;
raid = MR_LdRaidGet(ld, map);
dev_dbg(&instance->pdev->dev, "LD %x: span_depth=%x\n",
@@ -1157,7 +1159,7 @@ void mr_update_span_set(struct MR_DRV_RAID_MAP_ALL *map,
for (ldCount = 0; ldCount < MAX_LOGICAL_DRIVES_EXT; ldCount++) {
ld = MR_TargetIdToLdGet(ldCount, map);
if (ld >= MAX_LOGICAL_DRIVES_EXT)
if (ld >= (MAX_LOGICAL_DRIVES_EXT - 1))
continue;
raid = MR_LdRaidGet(ld, map);
for (element = 0; element < MAX_QUAD_DEPTH; element++) {