apm821xx: fix crash/panic related to SATA/SSD choice
Ticerex on the OpenWrt Forum reported a gnarly crash when
he was using Samsung 840 and 850 EVOs with his MyBook Live:
| BUG: Kernel NULL pointer dereference at 0x00000000
| Faulting instruction address: 0xc03ed4b8
| Oops: Kernel access of bad area, sig: 11 [#1]
| BE PAGE_SIZE=4K PowerPC 44x Platform
| CPU: 0 PID: 362 Comm: scsi_eh_1 Not tainted 5.4.163 #0
| NIP:
c03ed4b8 LR:
c03d27e8 CTR:
c03ed36c
| REGS:
cfa59950 TRAP: 0300 Not tainted (5.4.163)
| MSR:
00021000 <CE,ME> CR:
42000222 XER:
00000000
| DEAR:
00000000 ESR:
00000000
| GPR00:
c03d27e8 cfa59a08 cfa55fe0 00000000 0fa46bc0 [...]
| [..]
| NIP [
c03ed4b8] sata_dwc_qc_issue+0x14c/0x254
| LR [
c03d27e8] ata_qc_issue+0x1c8/0x2dc
| Call Trace:
| [
cfa59a08] [
c003f4e0] __cancel_work_timer+0x124/0x194 (unreliable)
| [
cfa59a78] [
c03d27e8] ata_qc_issue+0x1c8/0x2dc
| [
cfa59a98] [
c03d2b3c] ata_exec_internal_sg+0x240/0x524
| [
cfa59b08] [
c03d2e98] ata_exec_internal+0x78/0xe0
| [
cfa59b58] [
c03d30fc] ata_read_log_page.part.38+0x1dc/0x204
| [
cfa59bc8] [
c03d324c] ata_identify_page_supported+0x68/0x130
| [...]
This turned out this is an issue with upstream changing
ATA_TAG_INTERNAL's value from 31 to 32 during 4.18 release.
Update "SATA_DWC_QCMD_MAX" to account for that.
Link: https://forum.openwrt.org/t/my-book-live-duo-reboot-loop/122464
Signed-off-by: Christian Lamparter <chunkeey@gmail.com>
(cherry picked from commit
e95dec811661f60ae931e09e320249187922bd67)
projects / openwrt / openwrt.git / commit