net: stmmac: move the EST lock to struct stmmac_priv

In the Linux kernel, the following vulnerability has been resolved:

net: stmmac: move the EST lock to struct stmmac_priv

Reinitialize the whole EST structure would also reset the mutex

lock which is embedded in the EST structure, and then trigger

the following warning. To address this, move the lock to struct

stmmac_priv. We also need to reacquire the mutex lock when doing

this initialization.

DEBUG_LOCKS_WARN_ON(lock->magic != lock)

WARNING: CPU: 3 PID: 505 at kernel/locking/mutex.c:587 __mutex_lock+0xd84/0x1068

Modules linked in:

CPU: 3 PID: 505 Comm: tc Not tainted 6.9.0-rc6-00053-g0106679839f7-dirty #29

Hardware name: NXP i.MX8MPlus EVK board (DT)

pstate: 60000005 (nZCv daif -PAN -UAO -TCO -DIT -SSBS BTYPE=--)

pc : __mutex_lock+0xd84/0x1068

lr : __mutex_lock+0xd84/0x1068

sp : ffffffc0864e3570

x29: ffffffc0864e3570 x28: ffffffc0817bdc78 x27: 0000000000000003

x26: ffffff80c54f1808 x25: ffffff80c9164080 x24: ffffffc080d723ac

x23: 0000000000000000 x22: 0000000000000002 x21: 0000000000000000

x20: 0000000000000000 x19: ffffffc083bc3000 x18: ffffffffffffffff

x17: ffffffc08117b080 x16: 0000000000000002 x15: ffffff80d2d40000

x14: 00000000000002da x13: ffffff80d2d404b8 x12: ffffffc082b5a5c8

x11: ffffffc082bca680 x10: ffffffc082bb2640 x9 : ffffffc082bb2698

x8 : 0000000000017fe8 x7 : c0000000ffffefff x6 : 0000000000000001

x5 : ffffff8178fe0d48 x4 : 0000000000000000 x3 : 0000000000000027

x2 : ffffff8178fe0d50 x1 : 0000000000000000 x0 : 0000000000000000

Call trace:

__mutex_lock+0xd84/0x1068

mutex_lock_nested+0x28/0x34

tc_setup_taprio+0x118/0x68c

stmmac_setup_tc+0x50/0xf0

taprio_change+0x868/0xc9c