TWxSoftware/twx-linux
1
0
Fork 0
Code Issues Pull Requests Actions Packages Projects Releases Wiki Activity

wifi: ath12k: Fix memory leak in rx_desc and tx_desc

Browse Source 
Currently when ath12k_dp_cc_desc_init() is called we allocate
memory to rx_descs and tx_descs. In ath12k_dp_cc_cleanup(), during
descriptor cleanup rx_descs and tx_descs memory is not freed.

This is cause of memory leak. These allocated memory should be
freed in ath12k_dp_cc_cleanup.

In ath12k_dp_cc_desc_init(), we can save base address of rx_descs
and tx_descs. In ath12k_dp_cc_cleanup(), we can free rx_descs and
tx_descs memory using their base address.

Tested-on: QCN9274 hw2.0 PCI WLAN.WBE.1.0.1-00029-QCAHKSWPL_SILICONZ-1

Signed-off-by: Rajat Soni <quic_rajson@quicinc.com>
Signed-off-by: Kalle Valo <quic_kvalo@quicinc.com>
Link: https://lore.kernel.org/r/20230718053510.30894-1-quic_rajson@quicinc.com
This commit is contained in:
Rajat Soni
2023-08-22 16:42:23 +03:00
committed by Kalle Valo
parent e10ec6ea61
commit afb522b36e
2 changed files with 31 additions and 1 deletions
Download Patch File Download Diff File Expand all files Collapse all files
drivers/net/wireless/ath/ath12k/dp.c
+29 -1
View File
@@ -1129,6 +1129,7 @@ static void ath12k_dp_cc_cleanup(struct ath12k_base *ab)
struct ath12k_dp *dp = &ab->dp;
struct sk_buff *skb;
int i;
u32 pool_id, tx_spt_page;
if (!dp->spt_info)
return;
@@ -1148,6 +1149,14 @@ static void ath12k_dp_cc_cleanup(struct ath12k_base *ab)
dev_kfree_skb_any(skb);
}
for (i = 0; i < ATH12K_NUM_RX_SPT_PAGES; i++) {
if (!dp->spt_info->rxbaddr[i])
continue;
kfree(dp->spt_info->rxbaddr[i]);
dp->spt_info->rxbaddr[i] = NULL;
}
spin_unlock_bh(&dp->rx_desc_lock);
/* TX Descriptor cleanup */
@@ -1170,6 +1179,21 @@ static void ath12k_dp_cc_cleanup(struct ath12k_base *ab)
spin_unlock_bh(&dp->tx_desc_lock[i]);
}
for (pool_id = 0; pool_id < ATH12K_HW_MAX_QUEUES; pool_id++) {
spin_lock_bh(&dp->tx_desc_lock[pool_id]);
for (i = 0; i < ATH12K_TX_SPT_PAGES_PER_POOL; i++) {
tx_spt_page = i + pool_id * ATH12K_TX_SPT_PAGES_PER_POOL;
if (!dp->spt_info->txbaddr[tx_spt_page])
continue;
kfree(dp->spt_info->txbaddr[tx_spt_page]);
dp->spt_info->txbaddr[tx_spt_page] = NULL;
}
spin_unlock_bh(&dp->tx_desc_lock[pool_id]);
}
/* unmap SPT pages */
for (i = 0; i < dp->num_spt_pages; i++) {
if (!dp->spt_info[i].vaddr)
@@ -1343,6 +1367,8 @@ static int ath12k_dp_cc_desc_init(struct ath12k_base *ab)
return -ENOMEM;
}
dp->spt_info->rxbaddr[i] = &rx_descs[0];
for (j = 0; j < ATH12K_MAX_SPT_ENTRIES; j++) {
rx_descs[j].cookie = ath12k_dp_cc_cookie_gen(i, j);
rx_descs[j].magic = ATH12K_DP_RX_DESC_MAGIC;
@@ -1368,8 +1394,10 @@ static int ath12k_dp_cc_desc_init(struct ath12k_base *ab)
return -ENOMEM;
}
tx_spt_page = i + pool_id * ATH12K_TX_SPT_PAGES_PER_POOL;
dp->spt_info->txbaddr[tx_spt_page] = &tx_descs[0];
for (j = 0; j < ATH12K_MAX_SPT_ENTRIES; j++) {
tx_spt_page = i + pool_id * ATH12K_TX_SPT_PAGES_PER_POOL;
ppt_idx = ATH12K_NUM_RX_SPT_PAGES + tx_spt_page;
tx_descs[j].desc_id = ath12k_dp_cc_cookie_gen(ppt_idx, j);
tx_descs[j].pool_id = pool_id;
drivers/net/wireless/ath/ath12k/dp.h
+2
View File
@@ -289,6 +289,8 @@ struct ath12k_tx_desc_info {
struct ath12k_spt_info {
dma_addr_t paddr;
u64 *vaddr;
struct ath12k_rx_desc_info *rxbaddr[ATH12K_NUM_RX_SPT_PAGES];
struct ath12k_tx_desc_info *txbaddr[ATH12K_NUM_TX_SPT_PAGES];
};
struct ath12k_reo_queue_ref {