[PATCH 6.19 780/844] octeontx2-af: CGX: fix bitmap leaks

[Sasha Levin]

From: Bo Sun <bo@xxxxxxxxxxx>

[ Upstream commit 3def995c4ede842adf509c410e92d09a0cedc965 ]

The RX/TX flow-control bitmaps (rx_fc_pfvf_bmap and tx_fc_pfvf_bmap)
are allocated by cgx_lmac_init() but never freed in cgx_lmac_exit().
Unbinding and rebinding the driver therefore triggers kmemleak:

    unreferenced object (size 16):
        backtrace:
          rvu_alloc_bitmap
          cgx_probe

Free both bitmaps during teardown.

Fixes: e740003874ed ("octeontx2-af: Flow control resource management")
Cc: stable@xxxxxxxxxxxxxxx
Signed-off-by: Bo Sun <bo@xxxxxxxxxxx>
Reviewed-by: Vadim Fedorenko <vadim.fedorenko@xxxxxxxxx>
Reviewed-by: Jijie Shao <shaojijie@xxxxxxxxxx>
Link: https://patch.msgid.link/20260206130925.1087588-2-bo@xxxxxxxxxxx
Signed-off-by: Jakub Kicinski <kuba@xxxxxxxxxx>
Signed-off-by: Sasha Levin <sashal@xxxxxxxxxx>
---
 drivers/net/ethernet/marvell/octeontx2/af/cgx.c | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/drivers/net/ethernet/marvell/octeontx2/af/cgx.c b/drivers/net/ethernet/marvell/octeontx2/af/cgx.c
index 42044cd810b1f..fd4792e432bf0 100644
--- a/drivers/net/ethernet/marvell/octeontx2/af/cgx.c
+++ b/drivers/net/ethernet/marvell/octeontx2/af/cgx.c
@@ -1823,6 +1823,8 @@ static int cgx_lmac_exit(struct cgx *cgx)
 		cgx->mac_ops->mac_pause_frm_config(cgx, lmac->lmac_id, false);
 		cgx_configure_interrupt(cgx, lmac, lmac->lmac_id, true);
 		kfree(lmac->mac_to_index_bmap.bmap);
+		rvu_free_bitmap(&lmac->rx_fc_pfvf_bmap);
+		rvu_free_bitmap(&lmac->tx_fc_pfvf_bmap);
 		kfree(lmac->name);
 		kfree(lmac);
 	}
-- 
2.51.0