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Commit 25090d39 authored by James Smart's avatar James Smart Committed by James Bottomley
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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: default avatarAlex Iannicelli <alex.iannicelli@emulex.com>
Signed-off-by: default avatarJames Smart <james.smart@emulex.com>
Signed-off-by: default avatarJames Bottomley <JBottomley@Parallels.com>
parent d438bd3a

drivers/scsi/lpfc/lpfc_sli.c

+8 −6
Original line number Original line Diff line number Diff line
@@ -13286,7 +13286,7 @@ lpfc_sli4_post_els_sgl_list_ext(struct lpfc_hba *phba) 
	LPFC_MBOXQ_t *mbox;

	LPFC_MBOXQ_t *mbox;

	uint32_t reqlen, alloclen, index;

	uint32_t reqlen, alloclen, index;

	uint32_t mbox_tmo;

	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;

	uint16_t xritag_start = 0, lxri = 0;

	struct lpfc_rsrc_blks *rsrc_blk;

	struct lpfc_rsrc_blks *rsrc_blk;

	int cnt, ttl_cnt, rc = 0;

	int cnt, ttl_cnt, rc = 0;
@@ -13308,6 +13308,7 @@ lpfc_sli4_post_els_sgl_list_ext(struct lpfc_hba *phba) 




	cnt = 0;

	cnt = 0;

	ttl_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_for_each_entry(rsrc_blk, &phba->sli4_hba.lpfc_xri_blk_list,

			    list) {

			    list) {

		rsrc_start = rsrc_blk->rsrc_start;

		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",

				"3014 Working ELS Extent start %d, cnt %d\n",

				rsrc_start, rsrc_size);

				rsrc_start, rsrc_size);





		loop_cnt = min(els_xri_cnt, rsrc_size);

		loop_cnt = min(post_els_xri_cnt, rsrc_size);

		if (ttl_cnt + loop_cnt >= els_xri_cnt) {

		if (loop_cnt < post_els_xri_cnt) {

			loop_cnt = els_xri_cnt - ttl_cnt;

			post_els_xri_cnt -= loop_cnt;

			ttl_cnt = els_xri_cnt;

			ttl_cnt += loop_cnt;

		}

		} else

			ttl_cnt += post_els_xri_cnt;





		mbox = mempool_alloc(phba->mbox_mem_pool, GFP_KERNEL);

		mbox = mempool_alloc(phba->mbox_mem_pool, GFP_KERNEL);

		if (!mbox)

		if (!mbox)