samsung_sm8750/android_kernel_samsung_sm8750
1
0
Fork 0
Code Issues Pull Requests Actions Packages Projects Releases Wiki Activity

wifi: ath12k: fix failed to set mhi state error during reboot with hardware grouping

Browse Source 
[ Upstream commit dce7aec6b1f74b0a46b901ab8de1f7bd0515f733 ]

With hardware grouping, during reboot, whenever a device is removed, it
powers down itself and all its partner devices in the same group. Now this
is done by all devices and hence there is multiple power down for devices
and hence the following error messages can be seen:

ath12k_pci 0002:01:00.0: failed to set mhi state POWER_OFF(3) in current mhi state (0x0)
ath12k_pci 0002:01:00.0: failed to set mhi state: POWER_OFF(3)
ath12k_pci 0002:01:00.0: failed to set mhi state DEINIT(1) in current mhi state (0x0)
ath12k_pci 0002:01:00.0: failed to set mhi state: DEINIT(1)
ath12k_pci 0003:01:00.0: failed to set mhi state POWER_OFF(3) in current mhi state (0x0)
ath12k_pci 0003:01:00.0: failed to set mhi state: POWER_OFF(3)
ath12k_pci 0003:01:00.0: failed to set mhi state DEINIT(1) in current mhi state (0x0)
ath12k_pci 0003:01:00.0: failed to set mhi state: DEINIT(1)
ath12k_pci 0004:01:00.0: failed to set mhi state POWER_OFF(3) in current mhi state (0x0)
ath12k_pci 0004:01:00.0: failed to set mhi state: POWER_OFF(3)

To prevent this, check if the ATH12K_PCI_FLAG_INIT_DONE flag is already
set before powering down. If it is set, it indicates that another partner
device has already performed the power down, and this device can skip this
step.

Tested-on: QCN9274 hw2.0 PCI WLAN.WBE.1.3.1-00173-QCAHKSWPL_SILICONZ-1
Tested-on: QCN9274 hw2.0 PCI WLAN.WBE.1.4.1-00199-QCAHKSWPL_SILICONZ-1
Tested-on: WCN7850 hw2.0 PCI WLAN.HMT.1.0.c5-00481-QCAHMTSWPL_V1.0_V2.0_SILICONZ-3

Signed-off-by: Aditya Kumar Singh <aditya.kumar.singh@oss.qualcomm.com>
Reviewed-by: Vasanthakumar Thiagarajan <vasanthakumar.thiagarajan@oss.qualcomm.com>
Link: https://patch.msgid.link/20250408-fix_reboot_issues_with_hw_grouping-v4-3-95e7bf048595@oss.qualcomm.com
Signed-off-by: Jeff Johnson <jeff.johnson@oss.qualcomm.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>
This commit is contained in:
Aditya Kumar Singh
2025-04-08 11:36:31 +05:30
committed by Greg Kroah-Hartman
parent 5cf32cef3a
commit 79dc5e78d1
1 changed files with 3 additions and 0 deletions
Download Patch File Download Diff File Expand all files Collapse all files

3
drivers/net/wireless/ath/ath12k/pci.c
View File

@@ -1153,6 +1153,9 @@ void ath12k_pci_power_down(struct ath12k_base *ab)
{ {
struct ath12k_pci *ab_pci = ath12k_pci_priv(ab); struct ath12k_pci *ab_pci = ath12k_pci_priv(ab);
if (!test_bit(ATH12K_PCI_FLAG_INIT_DONE, &ab_pci->flags))
return;
/* restore aspm in case firmware bootup fails */ /* restore aspm in case firmware bootup fails */
ath12k_pci_aspm_restore(ab_pci); ath12k_pci_aspm_restore(ab_pci);