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mac80211: ath12k: prevent ltssm crash

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Fix ltssm crashes on BPI-Rx boards.
Seems read32/write32 using wrong address which
is not a problem on x86/64 PCI controllers.
But have issues on BPI-Rx boards.

Signed-off-by: Janusz Dziedzic <janusz.dziedzic@gmail.com>
Link: https://github.com/openwrt/openwrt/pull/15945
Signed-off-by: Hauke Mehrtens <hauke@hauke-m.de>
This commit is contained in:
Janusz Dziedzic 2024-06-24 18:48:46 +02:00 committed by Hauke Mehrtens
parent 9cdd5ec7fd
commit 935b2b7dce
1 changed files with 17 additions and 0 deletions
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17
package/kernel/mac80211/patches/ath12k/100-ath12k-prevent-ltssm-startup-crash.patch Normal file
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@ -0,0 +1,17 @@
Fix ltssm crashes on BPI-Rx boards.
Seems read32/write32 using wrong address which
is not a problem on x86/64 PCI controllers.
But have issues on BPI-Rx boards.
--- a/drivers/net/wireless/ath/ath12k/pci.c
+++ b/drivers/net/wireless/ath/ath12k/pci.c
@@ -277,6 +277,9 @@ static void ath12k_pci_enable_ltssm(stru
u32 val;
int i;
+ /* Prevent startup crash on BPI-Rx */
+ return;
+
val = ath12k_pci_read32(ab, PCIE_PCIE_PARF_LTSSM);
/* PCIE link seems very unstable after the Hot Reset*/