diff options
| author | Iago Abal <mail@iagoabal.eu> | 2016-06-03 11:21:25 +0200 |
|---|---|---|
| committer | Sebastian Reichel <sre@kernel.org> | 2016-06-10 00:08:10 +0200 |
| commit | 3c13ab1d96e1924ef73b1a20c1ccccc993b6fb58 (patch) | |
| tree | 1ea69031639199f84e609e1c6f59791beb0c5fdf | |
| parent | hsi: use kmemdup (diff) | |
| download | linux-3c13ab1d96e1924ef73b1a20c1ccccc993b6fb58.tar.xz linux-3c13ab1d96e1924ef73b1a20c1ccccc993b6fb58.zip | |
HSI: cmt_speech: Fix double spin_lock
Release &hi->lock before calling `cs_hsi_control_read_error' to avoid deadlock.
The bug was found using EBA (https://github.com/models-team/eba), which reported
the following:
Double lock
first at drivers/hsi/clients/cmt_speech.c:443
second at drivers/hsi/clients/cmt_speech.c:447
In cs_hsi_read_on_control_complete defined at drivers/hsi/clients/cmt_speech.c:438:
(!) drivers/hsi/clients/cmt_speech.c:443: spin_lock(& hi->lock);
(?) drivers/hsi/clients/cmt_speech.c:445: msg->status == 4 -> true
(!) drivers/hsi/clients/cmt_speech.c:447: cs_hsi_control_read_error(hi, msg);
(!) drivers/hsi/clients/cmt_speech.c:407: __cs_hsi_error_pre(hi, msg, "control read",
& hi->control_state);
(!) drivers/hsi/clients/cmt_speech.c:382: spin_lock(& hi->lock);
Signed-off-by: Iago Abal <mail@iagoabal.eu>
Signed-off-by: Sebastian Reichel <sre@kernel.org>
| -rw-r--r-- | drivers/hsi/clients/cmt_speech.c | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/drivers/hsi/clients/cmt_speech.c b/drivers/hsi/clients/cmt_speech.c index b16cfa4b2360..3deef6cc7d7c 100644 --- a/drivers/hsi/clients/cmt_speech.c +++ b/drivers/hsi/clients/cmt_speech.c @@ -444,8 +444,8 @@ static void cs_hsi_read_on_control_complete(struct hsi_msg *msg) hi->control_state &= ~SSI_CHANNEL_STATE_READING; if (msg->status == HSI_STATUS_ERROR) { dev_err(&hi->cl->device, "Control RX error detected\n"); - cs_hsi_control_read_error(hi, msg); spin_unlock(&hi->lock); + cs_hsi_control_read_error(hi, msg); goto out; } dev_dbg(&hi->cl->device, "Read on control: %08X\n", cmd); |