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ath10k: Remove msdu from idr when management pkt send fails 

[ Upstream commit c730c47717 ]

Currently when the sending of any management pkt
via wmi command fails, the packet is being unmapped
freed in the error handling. But the idr entry added,
which is used to track these packet is not getting removed.

Hence, during unload, in wmi cleanup, all the entries
in IDR are removed and the corresponding buffer is
attempted to be freed. This can cause a situation where
one packet is attempted to be freed twice.

Fix this error by rmeoving the msdu from the idr
list when the sending of a management packet over
wmi fails.

Tested HW: WCN3990
Tested FW: WLAN.HL.3.1-01040-QCAHLSWMTPLZ-1

Fixes: 1807da4973 ("ath10k: wmi: add management tx by reference support over wmi")
Signed-off-by: Rakesh Pillai <pillair@codeaurora.org>
Signed-off-by: Kalle Valo <kvalo@codeaurora.org>
Link: https://lore.kernel.org/r/1588667015-25490-1-git-send-email-pillair@codeaurora.org
Signed-off-by: Sasha Levin <sashal@kernel.org>
5.4-rM2-2.2.x-imx-squashed
Rakesh Pillai 2020-05-08 05:55:18 +03:00 committed by Greg Kroah-Hartman
parent 671d8b8726
commit dbf2fab3f5
3 changed files with 28 additions and 0 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

3
drivers/net/wireless/ath/ath10k/mac.c
View File

@ -3911,6 +3911,9 @@ void ath10k_mgmt_over_wmi_tx_work(struct work_struct *work)
if (ret) {
ath10k_warn(ar, "failed to transmit management frame by ref via WMI: %d\n",
ret);
/* remove this msdu from idr tracking */
ath10k_wmi_cleanup_mgmt_tx_send(ar, skb);
dma_unmap_single(ar->dev, paddr, skb->len,
DMA_TO_DEVICE);
ieee80211_free_txskb(ar->hw, skb);

10
drivers/net/wireless/ath/ath10k/wmi-ops.h
View File

@ -133,6 +133,7 @@ struct wmi_ops {
struct sk_buff *(*gen_mgmt_tx_send)(struct ath10k *ar,
struct sk_buff *skb,
dma_addr_t paddr);
int (*cleanup_mgmt_tx_send)(struct ath10k *ar, struct sk_buff *msdu);
struct sk_buff *(*gen_dbglog_cfg)(struct ath10k *ar, u64 module_enable,
u32 log_level);
struct sk_buff *(*gen_pktlog_enable)(struct ath10k *ar, u32 filter);
@ -441,6 +442,15 @@ ath10k_wmi_get_txbf_conf_scheme(struct ath10k *ar)
return ar->wmi.ops->get_txbf_conf_scheme(ar);
}
static inline int
ath10k_wmi_cleanup_mgmt_tx_send(struct ath10k *ar, struct sk_buff *msdu)
{
if (!ar->wmi.ops->cleanup_mgmt_tx_send)
return -EOPNOTSUPP;
return ar->wmi.ops->cleanup_mgmt_tx_send(ar, msdu);
}
static inline int
ath10k_wmi_mgmt_tx_send(struct ath10k *ar, struct sk_buff *msdu,
dma_addr_t paddr)

15
drivers/net/wireless/ath/ath10k/wmi-tlv.c
View File

@ -2837,6 +2837,18 @@ ath10k_wmi_tlv_op_gen_request_stats(struct ath10k *ar, u32 stats_mask)
return skb;
}
static int
ath10k_wmi_tlv_op_cleanup_mgmt_tx_send(struct ath10k *ar,
struct sk_buff *msdu)
{
struct ath10k_skb_cb *cb = ATH10K_SKB_CB(msdu);
struct ath10k_wmi *wmi = &ar->wmi;
idr_remove(&wmi->mgmt_pending_tx, cb->msdu_id);
return 0;
}
static int
ath10k_wmi_mgmt_tx_alloc_msdu_id(struct ath10k *ar, struct sk_buff *skb,
dma_addr_t paddr)
@ -2911,6 +2923,8 @@ ath10k_wmi_tlv_op_gen_mgmt_tx_send(struct ath10k *ar, struct sk_buff *msdu,
if (desc_id < 0)
goto err_free_skb;
cb->msdu_id = desc_id;
ptr = (void *)skb->data;
tlv = ptr;
tlv->tag = __cpu_to_le16(WMI_TLV_TAG_STRUCT_MGMT_TX_CMD);
@ -4339,6 +4353,7 @@ static const struct wmi_ops wmi_tlv_ops = {
.gen_force_fw_hang = ath10k_wmi_tlv_op_gen_force_fw_hang,
/* .gen_mgmt_tx = not implemented; HTT is used */
.gen_mgmt_tx_send = ath10k_wmi_tlv_op_gen_mgmt_tx_send,
.cleanup_mgmt_tx_send = ath10k_wmi_tlv_op_cleanup_mgmt_tx_send,
.gen_dbglog_cfg = ath10k_wmi_tlv_op_gen_dbglog_cfg,
.gen_pktlog_enable = ath10k_wmi_tlv_op_gen_pktlog_enable,
.gen_pktlog_disable = ath10k_wmi_tlv_op_gen_pktlog_disable,