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Revert "wifi: ath10k: avoid unnecessary wait for service ready message"

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commit 2469bb6a6af944755a7d7daf66be90f3b8decbf9 upstream.

This reverts commit 51a73f1b2e56b0324b4a3bb8cebc4221b5be4c7a.

Although this commit benefits QCA6174, it breaks QCA988x and
QCA9984 [1][2]. Since it is not likely to root cause/fix this
issue in a short time, revert it to get those chips back.

Compile tested only.

Fixes: 51a73f1b2e56 ("wifi: ath10k: avoid unnecessary wait for service ready message")
Link: https://lore.kernel.org/ath10k/6d41bc00602c33ffbf68781f563ff2e6c6915a3e.camel@gmail.com # [1]
Closes: https://bugzilla.kernel.org/show_bug.cgi?id=220671 # [2]
Signed-off-by: Baochen Qiang <baochen.qiang@oss.qualcomm.com>
Reviewed-by: Vasanthakumar Thiagarajan <vasanthakumar.thiagarajan@oss.qualcomm.com>
Cc: stable@vger.kernel.org
Link: https://patch.msgid.link/20251027-ath10k-revert-polling-first-change-v1-1-89aaf3bcbfa1@oss.qualcomm.com
Signed-off-by: Jeff Johnson <jeff.johnson@oss.qualcomm.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Baochen Qiang
2025-10-27 09:49:12 +08:00
committed by Greg Kroah-Hartman
parent 994ec06b7b
commit 6d7567cc0b
1 changed files with 20 additions and 19 deletions
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39
drivers/net/wireless/ath/ath10k/wmi.c
View File

@@ -1763,32 +1763,33 @@ void ath10k_wmi_put_wmi_channel(struct ath10k *ar, struct wmi_channel *ch,
int ath10k_wmi_wait_for_service_ready(struct ath10k *ar)
{
unsigned long timeout = jiffies + WMI_SERVICE_READY_TIMEOUT_HZ;
unsigned long time_left, i;
/* Sometimes the PCI HIF doesn't receive interrupt
* for the service ready message even if the buffer
* was completed. PCIe sniffer shows that it's
* because the corresponding CE ring doesn't fires
* it. Workaround here by polling CE rings. Since
* the message could arrive at any time, continue
* polling until timeout.
*/
do {
time_left = wait_for_completion_timeout(&ar->wmi.service_ready,
WMI_SERVICE_READY_TIMEOUT_HZ);
if (!time_left) {
/* Sometimes the PCI HIF doesn't receive interrupt
* for the service ready message even if the buffer
* was completed. PCIe sniffer shows that it's
* because the corresponding CE ring doesn't fires
* it. Workaround here by polling CE rings once.
*/
ath10k_warn(ar, "failed to receive service ready completion, polling..\n");
for (i = 0; i < CE_COUNT; i++)
ath10k_hif_send_complete_check(ar, i, 1);
/* The 100 ms granularity is a tradeoff considering scheduler
* overhead and response latency
*/
time_left = wait_for_completion_timeout(&ar->wmi.service_ready,
msecs_to_jiffies(100));
if (time_left)
return 0;
} while (time_before(jiffies, timeout));
WMI_SERVICE_READY_TIMEOUT_HZ);
if (!time_left) {
ath10k_warn(ar, "polling timed out\n");
return -ETIMEDOUT;
}
ath10k_warn(ar, "failed to receive service ready completion\n");
return -ETIMEDOUT;
ath10k_warn(ar, "service ready completion received, continuing normally\n");
}
return 0;
}
int ath10k_wmi_wait_for_unified_ready(struct ath10k *ar)