Per-kernel driver fixes round 2: walnascar (kernel 6.12) green#49
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Old SRCREV (2019) failed to build on kernel 6.12 due to the struct usb_driver.drvwrap removal in 6.8 and cfg80211 signature changes. Bump to upstream HEAD 9c051142 (Mar 2026), which Mange has updated to track newer kernel APIs.
morrownr/8814au has tracked recent kernel API changes; the old SRCREV needed downstream patching for kernel 6.12 (do_patch was failing for unrelated reasons before, so this regression was not visible). Bump to upstream HEAD b1866ce2 (Feb 2026).
Kernel 6.14 added an unsigned int link_id parameter to the get_antenna cfg80211 callback. Upstream rolled in support; bump to 7f63a9da (Dec 2025) to pick that up.
Pin to 9704072d (Sep 2025), the last good commit before upstream PR #62 introduced the same undefined _FW_UNDER_SURVEY reference that broke rtl8821au under PR #198. Includes upstream's kernel 6.13 + 6.14 support patches.
The EmbeddedAndroid/rtl8723du embeddedandroid branch now carries the usb_driver.drvwrap removal fix (drvwrap was dropped from struct usb_driver in kernel 6.8). Bump SRCREV to pick up that commit.
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Second pass of per-kernel-version maintenance work. Gets every driver compiling on both LTS kernels we care about today: 6.6 (scarthgap) and 6.12 (walnascar). Kernel 6.14 still has three holdouts (rtl8723bu, rtl8723du, rtl8814au) which are tracked separately.
Verified via a native (driver, kernel) compile matrix run on a Debian trixie container against linux 6.6.93, 6.12.30 and 6.14.4. After this PR the 6.6 and 6.12 columns are all OK.
rtl8192eu: bumped SRCREV from 528ae317 (2019) to upstream HEAD 9c051142 (Mar 2026). Old revision broke on kernel 6.12 because struct usb_driver.drvwrap was removed in 6.8 and cfg80211_ch_switch_notify gained then lost an argument. Mange's HEAD has tracked both.
rtl8814au: bumped SRCREV from 6f80699e (Aug 2023) to b1866ce2 (Feb 2026). Upstream rolled in kernel 6.12 fixes; old SRCREV was failing on 6.12.
rtl8821cu: bumped SRCREV from 96c65c58 to 7f63a9da (Dec 2025) to pick up the kernel 6.14 get_antenna callback signature change.
rtl8812au: bumped SRCREV from c0efee9c to 9704072d (Sep 2025), the last good commit before upstream PR #62 introduced an undefined _FW_UNDER_SURVEY reference (the same regression that hit rtl8821au via PR #198). Includes upstream's kernel 6.13 + 6.14 support.
rtl8723du: bumped the EmbeddedAndroid/rtl8723du fork SRCREV to absorb two new fork commits:
Native compile matrix at the SRCREVs in this PR:
Remaining 6.14 failures are cfg80211 callback signature changes that will be addressed in a follow-up: rtl8821cu-style get_antenna add for the others, plus set_monitor_channel for rtl8723du, plus rtl8723bu and rtl8814au will need their own forks (lwfinger upstream is stale, morrownr/8814au has its own issue at 6.14).