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789a0bac35
Synchronize the ath11k backports with the current ath-next tree. This brings in actually setting the MU-MIMO parameters in HW and 6GHz regulatory support along with some minor resource handling fixes. This allows to easily backport further fixes as cherry picking them has started requiring manual conflict resolution. Signed-off-by: Robert Marko <robimarko@gmail.com>
80 lines
3.1 KiB
Diff
80 lines
3.1 KiB
Diff
From 5a78ac33e3cb8822da64dd1af196e83664b332b0 Mon Sep 17 00:00:00 2001
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From: Aditya Kumar Singh <quic_adisi@quicinc.com>
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Date: Thu, 9 Mar 2023 15:23:08 +0530
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Subject: [PATCH] wifi: ath11k: fix deinitialization of firmware resources
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Currently, in ath11k_ahb_fw_resources_init(), iommu domain
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mapping is done only for the chipsets having fixed firmware
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memory. Also, for such chipsets, mapping is done only if it
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does not have TrustZone support.
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During deinitialization, only if TrustZone support is not there,
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iommu is unmapped back. However, for non fixed firmware memory
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chipsets, TrustZone support is not there and this makes the
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condition check to true and it tries to unmap the memory which
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was not mapped during initialization.
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This leads to the following trace -
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[ 83.198790] Unable to handle kernel NULL pointer dereference at virtual address 0000000000000008
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[ 83.259537] Modules linked in: ath11k_ahb ath11k qmi_helpers
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.. snip ..
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[ 83.280286] pstate: 20000005 (nzCv daif -PAN -UAO -TCO -DIT -SSBS BTYPE=--)
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[ 83.287228] pc : __iommu_unmap+0x30/0x140
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[ 83.293907] lr : iommu_unmap+0x5c/0xa4
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[ 83.298072] sp : ffff80000b3abad0
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.. snip ..
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[ 83.369175] Call trace:
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[ 83.376282] __iommu_unmap+0x30/0x140
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[ 83.378541] iommu_unmap+0x5c/0xa4
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[ 83.382360] ath11k_ahb_fw_resource_deinit.part.12+0x2c/0xac [ath11k_ahb]
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[ 83.385666] ath11k_ahb_free_resources+0x140/0x17c [ath11k_ahb]
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[ 83.392521] ath11k_ahb_shutdown+0x34/0x40 [ath11k_ahb]
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[ 83.398248] platform_shutdown+0x20/0x2c
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[ 83.403455] device_shutdown+0x16c/0x1c4
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[ 83.407621] kernel_restart_prepare+0x34/0x3c
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[ 83.411529] kernel_restart+0x14/0x74
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[ 83.415781] __do_sys_reboot+0x1c4/0x22c
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[ 83.419427] __arm64_sys_reboot+0x1c/0x24
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[ 83.423420] invoke_syscall+0x44/0xfc
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[ 83.427326] el0_svc_common.constprop.3+0xac/0xe8
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[ 83.430974] do_el0_svc+0xa0/0xa8
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[ 83.435659] el0_svc+0x1c/0x44
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[ 83.438957] el0t_64_sync_handler+0x60/0x144
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[ 83.441910] el0t_64_sync+0x15c/0x160
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[ 83.446343] Code: aa0103f4 f9400001 f90027a1 d2800001 (f94006a0)
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[ 83.449903] ---[ end trace 0000000000000000 ]---
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This can be reproduced by probing an AHB chipset which is not
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having a fixed memory region. During reboot (or rmmod) trace
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can be seen.
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Fix this issue by adding a condition check on firmware fixed memory
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hw_param as done in the counter initialization function.
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Tested-on: IPQ8074 hw2.0 AHB WLAN.HK.2.7.0.1-01744-QCAHKSWPL_SILICONZ-1
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Fixes: f9eec4947add ("ath11k: Add support for targets without trustzone")
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Signed-off-by: Aditya Kumar Singh <quic_adisi@quicinc.com>
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Signed-off-by: Kalle Valo <quic_kvalo@quicinc.com>
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Link: https://lore.kernel.org/r/20230309095308.24937-1-quic_adisi@quicinc.com
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---
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drivers/net/wireless/ath/ath11k/ahb.c | 6 ++++++
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1 file changed, 6 insertions(+)
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--- a/drivers/net/wireless/ath/ath11k/ahb.c
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+++ b/drivers/net/wireless/ath/ath11k/ahb.c
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@@ -1078,6 +1078,12 @@ static int ath11k_ahb_fw_resource_deinit
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struct iommu_domain *iommu;
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size_t unmapped_size;
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+ /* Chipsets not requiring MSA would have not initialized
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+ * MSA resources, return success in such cases.
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+ */
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+ if (!ab->hw_params.fixed_fw_mem)
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+ return 0;
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+
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if (ab_ahb->fw.use_tz)
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return 0;
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