On 7/16/25 8:10 AM, Baochen Qiang wrote:

On 7/15/2025 9:23 PM, Muhammad Usama Anjum wrote:

...

Don't deinitialize and reinitialize the HAL helpers. The dma memory is deallocated and there is high possibility that we'll not be able to get the same memory allocated from dma when there is high memory pressure.

Tested-on: WCN6855 hw2.0 PCI WLAN.HSP.1.1-03926.13-QCAHSPSWPL_V2_SILICONZ_CE-2.52297.6

Fixes: d5c65159f289 ("ath11k: driver for Qualcomm IEEE 802.11ax devices") Cc: stable@vger.kernel.org Cc: Baochen Qiang baochen.qiang@oss.qualcomm.com Signed-off-by: Muhammad Usama Anjum usama.anjum@collabora.com

---

Changes since v1:

• Cc stable and fix tested on tag
• Clear essential fields as they may have stale data

---

drivers/net/wireless/ath/ath11k/core.c | 6 +----- drivers/net/wireless/ath/ath11k/hal.c | 12 ++++++++++++ drivers/net/wireless/ath/ath11k/hal.h | 1 + 3 files changed, 14 insertions(+), 5 deletions(-)

diff --git a/drivers/net/wireless/ath/ath11k/core.c b/drivers/net/wireless/ath/ath11k/core.c index 4488e4cdc5e9e..34b27711ed00f 100644 --- a/drivers/net/wireless/ath/ath11k/core.c +++ b/drivers/net/wireless/ath/ath11k/core.c @@ -2213,14 +2213,10 @@ static int ath11k_core_reconfigure_on_crash(struct ath11k_base *ab) mutex_unlock(&ab->core_lock); ath11k_dp_free(ab);

• ath11k_hal_srng_deinit(ab);

• ath11k_hal_srng_clear(ab);

ab->free_vdev_map = (1LL << (ab->num_radios * TARGET_NUM_VDEVS(ab))) - 1;

• ret = ath11k_hal_srng_init(ab);
• if (ret)

• return ret;
  

• clear_bit(ATH11K_FLAG_CRASH_FLUSH, &ab->dev_flags);

ret = ath11k_core_qmi_firmware_ready(ab); diff --git a/drivers/net/wireless/ath/ath11k/hal.c b/drivers/net/wireless/ath/ath11k/hal.c index b32de563d453a..dafa9bdbb3d32 100644 --- a/drivers/net/wireless/ath/ath11k/hal.c +++ b/drivers/net/wireless/ath/ath11k/hal.c @@ -1359,6 +1359,18 @@ void ath11k_hal_srng_deinit(struct ath11k_base *ab) } EXPORT_SYMBOL(ath11k_hal_srng_deinit); +void ath11k_hal_srng_clear(struct ath11k_base *ab) +{

• memset(ab->hal.srng_list, 0,

•       sizeof(ab->hal.srng_list));
  

• memset(ab->hal.shadow_reg_addr, 0,

•       sizeof(ab->hal.shadow_reg_addr));
  

nit: I would add comment here that no need to memset rdp and wrp memory since each individual segment would get cleared when

ath11k_hal_srng_src_hw_init() *srng->u.src_ring.tp_addr = 0;

and ath11k_hal_srng_dst_hw_init() *srng->u.dst_ring.hp_addr = 0;

I'll add: /* No need to memset rdp and wrp memory since each individual * segment would get cleared ath11k_hal_srng_src_hw_init() and * ath11k_hal_srng_dst_hw_init(). */

...

• ab->hal.avail_blk_resource = 0;
• ab->hal.current_blk_index = 0;
• ab->hal.num_shadow_reg_configured = 0;

+} +EXPORT_SYMBOL(ath11k_hal_srng_clear);

void ath11k_hal_dump_srng_stats(struct ath11k_base *ab) { struct hal_srng *srng; diff --git a/drivers/net/wireless/ath/ath11k/hal.h b/drivers/net/wireless/ath/ath11k/hal.h index 601542410c752..839095af9267e 100644 --- a/drivers/net/wireless/ath/ath11k/hal.h +++ b/drivers/net/wireless/ath/ath11k/hal.h @@ -965,6 +965,7 @@ int ath11k_hal_srng_setup(struct ath11k_base *ab, enum hal_ring_type type, struct hal_srng_params *params); int ath11k_hal_srng_init(struct ath11k_base *ath11k); void ath11k_hal_srng_deinit(struct ath11k_base *ath11k); +void ath11k_hal_srng_clear(struct ath11k_base *ab); void ath11k_hal_dump_srng_stats(struct ath11k_base *ab); void ath11k_hal_srng_get_shadow_config(struct ath11k_base *ab, u32 **cfg, u32 *len);

other than the nit:

Reviewed-by: Baochen Qiang baochen.qiang@oss.qualcomm.com

Thanks, Usama