[SCSI] lpfc 8.2.5 : Fix buffer leaks
Fix buffer leaks:
- HBQ dma buffer leak at dma_pool_destroy when unloading driver
- Fix missing buffer free in slow ring buffer handling
Signed-off-by: James Smart <james.smart@emulex.com>
Signed-off-by: James Bottomley <James.Bottomley@HansenPartnership.com>
diff --git a/drivers/scsi/lpfc/lpfc_sli.c b/drivers/scsi/lpfc/lpfc_sli.c
index c8c5b48..f532064 100644
--- a/drivers/scsi/lpfc/lpfc_sli.c
+++ b/drivers/scsi/lpfc/lpfc_sli.c
@@ -203,8 +203,25 @@
case CMD_IOCB_RCV_SEQ64_CX:
case CMD_IOCB_RCV_ELS64_CX:
case CMD_IOCB_RCV_CONT64_CX:
+ case CMD_IOCB_RET_XRI64_CX:
type = LPFC_UNSOL_IOCB;
break;
+ case CMD_IOCB_XMIT_MSEQ64_CR:
+ case CMD_IOCB_XMIT_MSEQ64_CX:
+ case CMD_IOCB_RCV_SEQ_LIST64_CX:
+ case CMD_IOCB_RCV_ELS_LIST64_CX:
+ case CMD_IOCB_CLOSE_EXTENDED_CN:
+ case CMD_IOCB_ABORT_EXTENDED_CN:
+ case CMD_IOCB_RET_HBQE64_CN:
+ case CMD_IOCB_FCP_IBIDIR64_CR:
+ case CMD_IOCB_FCP_IBIDIR64_CX:
+ case CMD_IOCB_FCP_ITASKMGT64_CX:
+ case CMD_IOCB_LOGENTRY_CN:
+ case CMD_IOCB_LOGENTRY_ASYNC_CN:
+ printk("%s - Unhandled SLI-3 Command x%x\n",
+ __FUNCTION__, iocb_cmnd);
+ type = LPFC_UNKNOWN_IOCB;
+ break;
default:
type = LPFC_UNKNOWN_IOCB;
break;
@@ -529,10 +546,13 @@
{
struct lpfc_dmabuf *dmabuf, *next_dmabuf;
struct hbq_dmabuf *hbq_buf;
+ unsigned long flags;
int i, hbq_count;
+ uint32_t hbqno;
hbq_count = lpfc_sli_hbq_count();
/* Return all memory used by all HBQs */
+ spin_lock_irqsave(&phba->hbalock, flags);
for (i = 0; i < hbq_count; ++i) {
list_for_each_entry_safe(dmabuf, next_dmabuf,
&phba->hbqs[i].hbq_buffer_list, list) {
@@ -542,6 +562,28 @@
}
phba->hbqs[i].buffer_count = 0;
}
+ /* Return all HBQ buffer that are in-fly */
+ list_for_each_entry_safe(dmabuf, next_dmabuf,
+ &phba->hbqbuf_in_list, list) {
+ hbq_buf = container_of(dmabuf, struct hbq_dmabuf, dbuf);
+ list_del(&hbq_buf->dbuf.list);
+ if (hbq_buf->tag == -1) {
+ (phba->hbqs[LPFC_ELS_HBQ].hbq_free_buffer)
+ (phba, hbq_buf);
+ } else {
+ hbqno = hbq_buf->tag >> 16;
+ if (hbqno >= LPFC_MAX_HBQS)
+ (phba->hbqs[LPFC_ELS_HBQ].hbq_free_buffer)
+ (phba, hbq_buf);
+ else
+ (phba->hbqs[hbqno].hbq_free_buffer)(phba,
+ hbq_buf);
+ }
+ }
+
+ /* Mark the HBQs not in use */
+ phba->hbq_in_use = 0;
+ spin_unlock_irqrestore(&phba->hbalock, flags);
}
static struct lpfc_hbq_entry *
@@ -603,6 +645,7 @@
lpfc_sli_hbqbuf_fill_hbqs(struct lpfc_hba *phba, uint32_t hbqno, uint32_t count)
{
uint32_t i, start, end;
+ unsigned long flags;
struct hbq_dmabuf *hbq_buffer;
if (!phba->hbqs[hbqno].hbq_alloc_buffer) {
@@ -615,6 +658,13 @@
end = lpfc_hbq_defs[hbqno]->entry_count;
}
+ /* Check whether HBQ is still in use */
+ spin_lock_irqsave(&phba->hbalock, flags);
+ if (!phba->hbq_in_use) {
+ spin_unlock_irqrestore(&phba->hbalock, flags);
+ return 0;
+ }
+
/* Populate HBQ entries */
for (i = start; i < end; i++) {
hbq_buffer = (phba->hbqs[hbqno].hbq_alloc_buffer)(phba);
@@ -626,6 +676,8 @@
else
(phba->hbqs[hbqno].hbq_free_buffer)(phba, hbq_buffer);
}
+
+ spin_unlock_irqrestore(&phba->hbalock, flags);
return 0;
}
@@ -910,16 +962,29 @@
uint32_t hbqno;
void *virt; /* virtual address ptr */
dma_addr_t phys; /* mapped address */
+ unsigned long flags;
+
+ /* Check whether HBQ is still in use */
+ spin_lock_irqsave(&phba->hbalock, flags);
+ if (!phba->hbq_in_use) {
+ spin_unlock_irqrestore(&phba->hbalock, flags);
+ return NULL;
+ }
hbq_entry = lpfc_sli_hbqbuf_find(phba, tag);
- if (hbq_entry == NULL)
+ if (hbq_entry == NULL) {
+ spin_unlock_irqrestore(&phba->hbalock, flags);
return NULL;
+ }
list_del(&hbq_entry->dbuf.list);
hbqno = tag >> 16;
new_hbq_entry = (phba->hbqs[hbqno].hbq_alloc_buffer)(phba);
- if (new_hbq_entry == NULL)
+ if (new_hbq_entry == NULL) {
+ list_add_tail(&hbq_entry->dbuf.list, &phba->hbqbuf_in_list);
+ spin_unlock_irqrestore(&phba->hbalock, flags);
return &hbq_entry->dbuf;
+ }
new_hbq_entry->tag = -1;
phys = new_hbq_entry->dbuf.phys;
virt = new_hbq_entry->dbuf.virt;
@@ -928,6 +993,9 @@
hbq_entry->dbuf.phys = phys;
hbq_entry->dbuf.virt = virt;
lpfc_sli_free_hbq(phba, hbq_entry);
+ list_add_tail(&new_hbq_entry->dbuf.list, &phba->hbqbuf_in_list);
+ spin_unlock_irqrestore(&phba->hbalock, flags);
+
return &new_hbq_entry->dbuf;
}
@@ -951,6 +1019,7 @@
uint32_t Rctl, Type;
uint32_t match, i;
struct lpfc_iocbq *iocbq;
+ struct lpfc_dmabuf *dmzbuf;
match = 0;
irsp = &(saveq->iocb);
@@ -972,6 +1041,29 @@
return 1;
}
+ if ((irsp->ulpCommand == CMD_IOCB_RET_XRI64_CX) &&
+ (phba->sli3_options & LPFC_SLI3_HBQ_ENABLED)) {
+ if (irsp->ulpBdeCount > 0) {
+ dmzbuf = lpfc_sli_get_buff(phba, pring,
+ irsp->un.ulpWord[3]);
+ lpfc_in_buf_free(phba, dmzbuf);
+ }
+
+ if (irsp->ulpBdeCount > 1) {
+ dmzbuf = lpfc_sli_get_buff(phba, pring,
+ irsp->unsli3.sli3Words[3]);
+ lpfc_in_buf_free(phba, dmzbuf);
+ }
+
+ if (irsp->ulpBdeCount > 2) {
+ dmzbuf = lpfc_sli_get_buff(phba, pring,
+ irsp->unsli3.sli3Words[7]);
+ lpfc_in_buf_free(phba, dmzbuf);
+ }
+
+ return 1;
+ }
+
if (phba->sli3_options & LPFC_SLI3_HBQ_ENABLED) {
if (irsp->ulpBdeCount != 0) {
saveq->context2 = lpfc_sli_get_buff(phba, pring,
@@ -2293,6 +2385,7 @@
/* Initialize the struct lpfc_sli_hbq structure for each hbq */
phba->link_state = LPFC_INIT_MBX_CMDS;
+ phba->hbq_in_use = 1;
hbq_entry_index = 0;
for (hbqno = 0; hbqno < hbq_count; ++hbqno) {