Heiko Stuebner ac7c8e6b6d crypto: rockchip - fix possible deadlock ... Lockdep warns about a possible deadlock resulting from the use of regular spin_locks: ================================= [ INFO: inconsistent lock state ] 4.4.0-rc2+ #2724 Not tainted --------------------------------- inconsistent {SOFTIRQ-ON-W} -> {IN-SOFTIRQ-W} usage. ksoftirqd/0/3 [HC0[0]:SC1[1]:HE1:SE0] takes: (&(&crypto_info->lock)->rlock){+.?...}, at: [<bf14a65c>] rk_crypto_tasklet_cb+0x24/0xb4 [rk_crypto] {SOFTIRQ-ON-W} state was registered at: [<c007f4ac>] lock_acquire+0x178/0x218 [<c0759bac>] _raw_spin_lock+0x54/0x64 [<bf14af88>] rk_handle_req+0x7c/0xbc [rk_crypto] [<bf14b040>] rk_des_ecb_encrypt+0x2c/0x30 [rk_crypto] [<bf14b05c>] rk_aes_ecb_encrypt+0x18/0x1c [rk_crypto] [<c028c820>] skcipher_encrypt_ablkcipher+0x64/0x68 [<c0290770>] __test_skcipher+0x2a8/0x8dc [<c0292e94>] test_skcipher+0x38/0xc4 [<c0292fb0>] alg_test_skcipher+0x90/0xb0 [<c0292158>] alg_test+0x1e8/0x280 [<c028f6f4>] cryptomgr_test+0x34/0x54 [<c004bbe8>] kthread+0xf4/0x10c [<c0010010>] ret_from_fork+0x14/0x24 irq event stamp: 10672 hardirqs last enabled at (10672): [<c002fac8>] tasklet_action+0x48/0x104 hardirqs last disabled at (10671): [<c002faa0>] tasklet_action+0x20/0x104 softirqs last enabled at (10658): [<c002ef84>] __do_softirq+0x358/0x49c softirqs last disabled at (10669): [<c002f108>] run_ksoftirqd+0x40/0x80 other info that might help us debug this: Possible unsafe locking scenario: CPU0 ---- lock(&(&crypto_info->lock)->rlock); <Interrupt> lock(&(&crypto_info->lock)->rlock); *** DEADLOCK *** Fix this by moving to irq-disabling spinlocks. Signed-off-by: Heiko Stuebner <heiko@sntech.de> Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>		2015-12-04 22:21:48 +08:00
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rk3288_crypto_ablkcipher.c	crypto: rockchip - fix possible deadlock	2015-12-04 22:21:48 +08:00
rk3288_crypto.c	crypto: rockchip - fix possible deadlock	2015-12-04 22:21:48 +08:00
rk3288_crypto.h