[PATCH 5.14 367/849] ath11k: fix some sleeping in atomic bugs
From: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Date: 2021-11-15 22:54:47
Also in:
lkml
Subsystem:
atheros ath generic utilities, qualcomm atheros ath11k wireless driver, the rest · Maintainers:
Jeff Johnson, Linus Torvalds
From: Dan Carpenter <redacted>
[ Upstream commit aadf7c81a0771b8f1c97dabca6a48bae1b387779 ]
The ath11k_dbring_bufs_replenish() and ath11k_dbring_fill_bufs()
take a "gfp" parameter but they since they take spinlocks, the
allocations they do have to be atomic. This causes a bug because
ath11k_dbring_buf_setup passes GFP_KERNEL for the gfp flags.
The fix is to use GFP_ATOMIC and remove the unused parameters.
Fixes: bd6478559e27 ("ath11k: Add direct buffer ring support")
Signed-off-by: Dan Carpenter <redacted>
Signed-off-by: Kalle Valo <redacted>
Link: https://lore.kernel.org/r/20210812070434.GE31863@kili (local)
Signed-off-by: Sasha Levin <sashal@kernel.org>
---
drivers/net/wireless/ath/ath11k/dbring.c | 16 +++++++---------
1 file changed, 7 insertions(+), 9 deletions(-)
diff --git a/drivers/net/wireless/ath/ath11k/dbring.c b/drivers/net/wireless/ath/ath11k/dbring.c
index 5e1f5437b4185..fd98ba5b1130b 100644
--- a/drivers/net/wireless/ath/ath11k/dbring.c
+++ b/drivers/net/wireless/ath/ath11k/dbring.c@@ -8,8 +8,7 @@ static int ath11k_dbring_bufs_replenish(struct ath11k *ar, struct ath11k_dbring *ring, - struct ath11k_dbring_element *buff, - gfp_t gfp) + struct ath11k_dbring_element *buff) { struct ath11k_base *ab = ar->ab; struct hal_srng *srng;
@@ -35,7 +34,7 @@ static int ath11k_dbring_bufs_replenish(struct ath11k *ar, goto err; spin_lock_bh(&ring->idr_lock); - buf_id = idr_alloc(&ring->bufs_idr, buff, 0, ring->bufs_max, gfp); + buf_id = idr_alloc(&ring->bufs_idr, buff, 0, ring->bufs_max, GFP_ATOMIC); spin_unlock_bh(&ring->idr_lock); if (buf_id < 0) { ret = -ENOBUFS;
@@ -72,8 +71,7 @@ err: } static int ath11k_dbring_fill_bufs(struct ath11k *ar, - struct ath11k_dbring *ring, - gfp_t gfp) + struct ath11k_dbring *ring) { struct ath11k_dbring_element *buff; struct hal_srng *srng;
@@ -92,11 +90,11 @@ static int ath11k_dbring_fill_bufs(struct ath11k *ar, size = sizeof(*buff) + ring->buf_sz + align - 1; while (num_remain > 0) { - buff = kzalloc(size, gfp); + buff = kzalloc(size, GFP_ATOMIC); if (!buff) break; - ret = ath11k_dbring_bufs_replenish(ar, ring, buff, gfp); + ret = ath11k_dbring_bufs_replenish(ar, ring, buff); if (ret) { ath11k_warn(ar->ab, "failed to replenish db ring num_remain %d req_ent %d\n", num_remain, req_entries);
@@ -176,7 +174,7 @@ int ath11k_dbring_buf_setup(struct ath11k *ar, ring->hp_addr = ath11k_hal_srng_get_hp_addr(ar->ab, srng); ring->tp_addr = ath11k_hal_srng_get_tp_addr(ar->ab, srng); - ret = ath11k_dbring_fill_bufs(ar, ring, GFP_KERNEL); + ret = ath11k_dbring_fill_bufs(ar, ring); return ret; }
@@ -322,7 +320,7 @@ int ath11k_dbring_buffer_release_event(struct ath11k_base *ab, } memset(buff, 0, size); - ath11k_dbring_bufs_replenish(ar, ring, buff, GFP_ATOMIC); + ath11k_dbring_bufs_replenish(ar, ring, buff); } spin_unlock_bh(&srng->lock);
--
2.33.0