Revert of fastrpc: Add missing bug fixes

[sgaud-quic]

synchronous external abort seen on rb3gen2 board :

[   12.956733] Internal error: synchronous external abort: 0000000086000010 [#1]  SMP
he[0m.
[   13.062890] CPU: 7 UID: 0 PID: 70 Comm: kworker/u32:1 Tainted: G   M    W           6.18.21-gc6e76e40614f-dirty #1 PREEMPT
[   13.062896] Tainted: [M]=MACHINE_CHECK, [W]=WARN
[   13.062897] Hardware name: Qualcomm Technologies, Inc. Robotics RB3gen2 (DT)
[   13.062900] Workqueue: efi_rts_wq efi_call_rts
[[0;32m  OK  [0m] Finished [0;1;39mAutomatic Boot Loader Upda[   13.062910] pstate: 80400005 (Nzcv daif +PAN -UAO -TCO -DIT -SSBS BTYPE=--)
[   13.062914] pc : 0x9d26b120
[   13.062917] lr : __efi_rt_asm_wrapper+0x50/0x74
[   13.062924] sp : ffff8000803a3ff0
[   13.062926] x29: ffff8000808dbd00 x28: 0000000000000000 x27: 0000000000000000
[   13.062930] x26: ffff000080020828 x25: 0000000000000000 x24: ffff000081469e05
[   13.062934] x23: ffffd32513994848 x22: ffff000080020800 x21: 0000000000000000
[   13.062938] x20: ffff8000859fbbd0 x19: ffffd32513994830 x18: ffff800085cdbc10
te[0m.
[   13.062941] x17: 0000000000000000 x16: ffff8000803a4000 x15: 000123007dce662a
[   13.062944] x14: ffff000080bb93d0 x13: ffff2cdc6c0e5000 x12: 0000000000000001
[   13.062948] x11: 00000000000000c0 x10: 0000000000000c50 x9 : ffff8000808dbd20
[   13.062951] x8 : 000000009d26b120 x7 : ffff00008092b988 x6 : ffff000088bd87c0
[   13.062955] x5 : 0000000000000020 x4 : ffff000088bd87c0 x3 : 0000000000000020
[   13.062958] x2 : 0000000000000007 x1 : ffff0000899c3c00 x0 : ffff0000899c3800
[   13.062962] Call trace:
[   13.062964]  0x9d26b120 (P)
[   13.062967]  efi_call_rts+0x1c0/0x274
[   13.062970]  process_one_work+0x154/0x3ac
[   13.062974]  worker_thread+0x18c/0x30c
[   13.062977]  kthread+0x140/0x220
[   13.062982]  ret_from_fork+0x10/0x20
[   13.062986] ---[ end trace 0000000000000000 ]---

[shashim-quic]

Approved the revert for release milestone. fastrpc must review and check the patches before resubmitting.

  cf859be8c367 in PR #433 — committed April 13, merged April 15, 2026

  Commit: FROMLIST: misc: fastrpc: Allocate entire reserved memory for Audio PD in probe

  What it does: Extends fastrpc_rpmsg_probe() to call qcom_scm_assign_mem() for the ADSP domain — something that was previously only done for SDSP. This
  reassigns adsp-rpc-remote-heap@9cb80000 (0x9cb80000–0x9d37ffff, 8 MiB) from HLOS to QCOM_SCM_VMID_LPASS + QCOM_SCM_VMID_ADSP_HEAP via TrustZone XPU,
  revoking HLOS CPU access to that range.

  Why it breaks: EFI firmware v2.7 has its runtime code/data inside that exact physical range (EFI tables at 0x9cc85018, 0x9cdbe018; EFI execution at
  0x9d26b120). After fastrpc probes and calls qcom_scm_assign_mem() at ~T=13 s, any subsequent EFI runtime call (via efi_rts_wq → efi_call_rts) hits an XPU
  violation → synchronous external abort → EFI runtime services permanently broken → systemd-random-seed SetVariable hangs forever → boot never reaches
  login.

[qcomlnxci]

Test Matrix

Test Case	lemans-evk	monaco-evk	qcs615-ride	qcs6490-rb3gen2	qcs8300-ride	qcs9100-ride-r3	sm8750-mtp	x1e80100-crd
0_qcom-next-ci-premerge-tests	◻️	❌ Fail	◻️	◻️	◻️	◻️	◻️	◻️
BT_FW_KMD_Service	◻️	✅ Pass	◻️	✅ Pass	✅ Pass	◻️	◻️	◻️
BT_ON_OFF	◻️	✅ Pass	◻️	✅ Pass	✅ Pass	◻️	◻️	◻️
BT_SCAN	◻️	✅ Pass	◻️	✅ Pass	✅ Pass	◻️	◻️	◻️
CPUFreq_Validation	◻️	✅ Pass	◻️	✅ Pass	✅ Pass	◻️	◻️	◻️
CPU_affinity	◻️	✅ Pass	◻️	✅ Pass	✅ Pass	◻️	◻️	◻️
DSP_AudioPD	◻️	✅ Pass	◻️	✅ Pass	✅ Pass	◻️	◻️	◻️
Ethernet	◻️	✅ Pass	◻️	⚠️ skip	✅ Pass	◻️	◻️	◻️
Freq_Scaling	◻️	✅ Pass	◻️	✅ Pass	✅ Pass	◻️	◻️	◻️
GIC	◻️	✅ Pass	◻️	✅ Pass	✅ Pass	◻️	◻️	◻️
IPA	◻️	✅ Pass	◻️	✅ Pass	✅ Pass	◻️	◻️	◻️
Interrupts	◻️	✅ Pass	◻️	✅ Pass	✅ Pass	◻️	◻️	◻️
OpenCV	◻️	⚠️ skip	◻️	⚠️ skip	⚠️ skip	◻️	◻️	◻️
PCIe	◻️	✅ Pass	◻️	✅ Pass	✅ Pass	◻️	◻️	◻️
Probe_Failure_Check	◻️	❌ Fail	◻️	❌ Fail	❌ Fail	◻️	◻️	◻️
RMNET	◻️	✅ Pass	◻️	✅ Pass	✅ Pass	◻️	◻️	◻️
UFS_Validation	◻️	✅ Pass	◻️	✅ Pass	✅ Pass	◻️	◻️	◻️
USBHost	◻️	✅ Pass	◻️	❌ Fail	✅ Pass	◻️	◻️	◻️
WiFi_Firmware_Driver	◻️	⚠️ skip	◻️	⚠️ skip	⚠️ skip	◻️	◻️	◻️
WiFi_OnOff	◻️	⚠️ skip	◻️	✅ Pass	✅ Pass	◻️	◻️	◻️
cdsp_remoteproc	◻️	✅ Pass	◻️	✅ Pass	✅ Pass	◻️	◻️	◻️
hotplug	◻️	✅ Pass	◻️	✅ Pass	✅ Pass	◻️	◻️	◻️
irq	◻️	✅ Pass	◻️	✅ Pass	✅ Pass	◻️	◻️	◻️
kaslr	◻️	✅ Pass	◻️	✅ Pass	✅ Pass	◻️	◻️	◻️
pinctrl	◻️	✅ Pass	◻️	✅ Pass	✅ Pass	◻️	◻️	◻️
qcom_hwrng	◻️	✅ Pass	◻️	✅ Pass	✅ Pass	◻️	◻️	◻️
remoteproc	◻️	✅ Pass	◻️	✅ Pass	✅ Pass	◻️	◻️	◻️
rngtest	◻️	✅ Pass	◻️	✅ Pass	✅ Pass	◻️	◻️	◻️
shmbridge	◻️	✅ Pass	◻️	✅ Pass	✅ Pass	◻️	◻️	◻️
smmu	◻️	✅ Pass	◻️	✅ Pass	✅ Pass	◻️	◻️	◻️
watchdog	◻️	✅ Pass	◻️	✅ Pass	✅ Pass	◻️	◻️	◻️
wpss_remoteproc	◻️	✅ Pass	◻️	✅ Pass	✅ Pass	◻️	◻️	◻️

[qcomlnxci]

Test jobs on e78abf4

• Job 74918 on lemans-evk
• Job 74921 on monaco-evk
• Job 74919 on qcs615-ride
• Job 74916 on qcs6490-rb3gen2
• Job 74922 on qcs8300-ride
• Job 74915 on qcs9100-ride-r3
• Job 74917 on sm8750-mtp
• Job 74920 on x1e80100-crd