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[SCSI] lpfc 8.3.30: Fixed panic with extents and small blocks 

Fixed system panic when extents enabled with large number of small blocks

Signed-off-by: Alex Iannicelli <alex.iannicelli@emulex.com>
Signed-off-by: James Smart <james.smart@emulex.com>
Signed-off-by: James Bottomley <JBottomley@Parallels.com>
This commit is contained in:
James Smart 2012-03-01 22:36:54 -05:00 committed by James Bottomley
parent d438bd3aef
commit 25090d398e
1 changed files with 8 additions and 6 deletions
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14
drivers/scsi/lpfc/lpfc_sli.c
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@ -13286,7 +13286,7 @@ lpfc_sli4_post_els_sgl_list_ext(struct lpfc_hba *phba)
LPFC_MBOXQ_t *mbox;
uint32_t reqlen, alloclen, index;
uint32_t mbox_tmo;
uint16_t rsrc_start, rsrc_size, els_xri_cnt;
uint16_t rsrc_start, rsrc_size, els_xri_cnt, post_els_xri_cnt;
uint16_t xritag_start = 0, lxri = 0;
struct lpfc_rsrc_blks *rsrc_blk;
int cnt, ttl_cnt, rc = 0;
@ -13308,6 +13308,7 @@ lpfc_sli4_post_els_sgl_list_ext(struct lpfc_hba *phba)
cnt = 0;
ttl_cnt = 0;
post_els_xri_cnt = els_xri_cnt;
list_for_each_entry(rsrc_blk, &phba->sli4_hba.lpfc_xri_blk_list,
list) {
rsrc_start = rsrc_blk->rsrc_start;
@ -13317,11 +13318,12 @@ lpfc_sli4_post_els_sgl_list_ext(struct lpfc_hba *phba)
"3014 Working ELS Extent start %d, cnt %d\n",
rsrc_start, rsrc_size);
loop_cnt = min(els_xri_cnt, rsrc_size);
if (ttl_cnt + loop_cnt >= els_xri_cnt) {
loop_cnt = els_xri_cnt - ttl_cnt;
ttl_cnt = els_xri_cnt;
}
loop_cnt = min(post_els_xri_cnt, rsrc_size);
if (loop_cnt < post_els_xri_cnt) {
post_els_xri_cnt -= loop_cnt;
ttl_cnt += loop_cnt;
} else
ttl_cnt += post_els_xri_cnt;
mbox = mempool_alloc(phba->mbox_mem_pool, GFP_KERNEL);
if (!mbox)