diff options
author | Sebastian Reichel <sre@kernel.org> | 2016-06-18 00:57:20 +0200 |
---|---|---|
committer | Sebastian Reichel <sre@kernel.org> | 2016-06-28 00:38:32 +0200 |
commit | 866dcb9d57fcad11c2647a154b2b246ac10d0795 (patch) | |
tree | 217d1202616b7056802609b36ffefd0434b75860 /drivers | |
parent | HSI: ssi_protocol: avoid ssi_waketest call with held spinlock (diff) | |
download | linux-866dcb9d57fcad11c2647a154b2b246ac10d0795.tar.xz linux-866dcb9d57fcad11c2647a154b2b246ac10d0795.zip |
HSI: ssi_protocol: replace spin_lock with spin_lock_bh
To avoid setting irq_safe runtime pm flag in omap-ssi, multiple calls
will be moved to process context. This also affects ssi-protocol, so
use the safer spin_lock_bh instead of a simple spin_lock.
Signed-off-by: Sebastian Reichel <sre@kernel.org>
Tested-by: Pavel Machek <pavel@ucw.cz>
Diffstat (limited to 'drivers')
-rw-r--r-- | drivers/hsi/clients/ssi_protocol.c | 64 |
1 files changed, 32 insertions, 32 deletions
diff --git a/drivers/hsi/clients/ssi_protocol.c b/drivers/hsi/clients/ssi_protocol.c index 8534efda8140..2388857db14b 100644 --- a/drivers/hsi/clients/ssi_protocol.c +++ b/drivers/hsi/clients/ssi_protocol.c @@ -520,17 +520,17 @@ static void ssip_start_rx(struct hsi_client *cl) dev_dbg(&cl->device, "RX start M(%d) R(%d)\n", ssi->main_state, ssi->recv_state); - spin_lock(&ssi->lock); + spin_lock_bh(&ssi->lock); /* * We can have two UP events in a row due to a short low * high transition. Therefore we need to ignore the sencond UP event. */ if ((ssi->main_state != ACTIVE) || (ssi->recv_state == RECV_READY)) { - spin_unlock(&ssi->lock); + spin_unlock_bh(&ssi->lock); return; } ssip_set_rxstate(ssi, RECV_READY); - spin_unlock(&ssi->lock); + spin_unlock_bh(&ssi->lock); msg = ssip_claim_cmd(ssi); ssip_set_cmd(msg, SSIP_READY_CMD); @@ -544,10 +544,10 @@ static void ssip_stop_rx(struct hsi_client *cl) struct ssi_protocol *ssi = hsi_client_drvdata(cl); dev_dbg(&cl->device, "RX stop M(%d)\n", ssi->main_state); - spin_lock(&ssi->lock); + spin_lock_bh(&ssi->lock); if (likely(ssi->main_state == ACTIVE)) ssip_set_rxstate(ssi, RECV_IDLE); - spin_unlock(&ssi->lock); + spin_unlock_bh(&ssi->lock); } static void ssip_free_strans(struct hsi_msg *msg) @@ -564,9 +564,9 @@ static void ssip_strans_complete(struct hsi_msg *msg) data = msg->context; ssip_release_cmd(msg); - spin_lock(&ssi->lock); + spin_lock_bh(&ssi->lock); ssip_set_txstate(ssi, SENDING); - spin_unlock(&ssi->lock); + spin_unlock_bh(&ssi->lock); hsi_async_write(cl, data); } @@ -671,17 +671,17 @@ static void ssip_rx_bootinforeq(struct hsi_client *cl, u32 cmd) /* Fall through */ case INIT: case HANDSHAKE: - spin_lock(&ssi->lock); + spin_lock_bh(&ssi->lock); ssi->main_state = HANDSHAKE; - spin_unlock(&ssi->lock); + spin_unlock_bh(&ssi->lock); if (!test_and_set_bit(SSIP_WAKETEST_FLAG, &ssi->flags)) ssi_waketest(cl, 1); /* FIXME: To be removed */ - spin_lock(&ssi->lock); + spin_lock_bh(&ssi->lock); /* Start boot handshake watchdog */ mod_timer(&ssi->tx_wd, jiffies + msecs_to_jiffies(SSIP_WDTOUT)); - spin_unlock(&ssi->lock); + spin_unlock_bh(&ssi->lock); dev_dbg(&cl->device, "Send BOOTINFO_RESP\n"); if (SSIP_DATA_VERSION(cmd) != SSIP_LOCAL_VERID) dev_warn(&cl->device, "boot info req verid mismatch\n"); @@ -703,14 +703,14 @@ static void ssip_rx_bootinforesp(struct hsi_client *cl, u32 cmd) if (SSIP_DATA_VERSION(cmd) != SSIP_LOCAL_VERID) dev_warn(&cl->device, "boot info resp verid mismatch\n"); - spin_lock(&ssi->lock); + spin_lock_bh(&ssi->lock); if (ssi->main_state != ACTIVE) /* Use tx_wd as a boot watchdog in non ACTIVE state */ mod_timer(&ssi->tx_wd, jiffies + msecs_to_jiffies(SSIP_WDTOUT)); else dev_dbg(&cl->device, "boot info resp ignored M(%d)\n", ssi->main_state); - spin_unlock(&ssi->lock); + spin_unlock_bh(&ssi->lock); } static void ssip_rx_waketest(struct hsi_client *cl, u32 cmd) @@ -718,22 +718,22 @@ static void ssip_rx_waketest(struct hsi_client *cl, u32 cmd) struct ssi_protocol *ssi = hsi_client_drvdata(cl); unsigned int wkres = SSIP_PAYLOAD(cmd); - spin_lock(&ssi->lock); + spin_lock_bh(&ssi->lock); if (ssi->main_state != HANDSHAKE) { dev_dbg(&cl->device, "wake lines test ignored M(%d)\n", ssi->main_state); - spin_unlock(&ssi->lock); + spin_unlock_bh(&ssi->lock); return; } - spin_unlock(&ssi->lock); + spin_unlock_bh(&ssi->lock); if (test_and_clear_bit(SSIP_WAKETEST_FLAG, &ssi->flags)) ssi_waketest(cl, 0); /* FIXME: To be removed */ - spin_lock(&ssi->lock); + spin_lock_bh(&ssi->lock); ssi->main_state = ACTIVE; del_timer(&ssi->tx_wd); /* Stop boot handshake timer */ - spin_unlock(&ssi->lock); + spin_unlock_bh(&ssi->lock); dev_notice(&cl->device, "WAKELINES TEST %s\n", wkres & SSIP_WAKETEST_FAILED ? "FAILED" : "OK"); @@ -750,20 +750,20 @@ static void ssip_rx_ready(struct hsi_client *cl) { struct ssi_protocol *ssi = hsi_client_drvdata(cl); - spin_lock(&ssi->lock); + spin_lock_bh(&ssi->lock); if (unlikely(ssi->main_state != ACTIVE)) { dev_dbg(&cl->device, "READY on wrong state: S(%d) M(%d)\n", ssi->send_state, ssi->main_state); - spin_unlock(&ssi->lock); + spin_unlock_bh(&ssi->lock); return; } if (ssi->send_state != WAIT4READY) { dev_dbg(&cl->device, "Ignore spurious READY command\n"); - spin_unlock(&ssi->lock); + spin_unlock_bh(&ssi->lock); return; } ssip_set_txstate(ssi, SEND_READY); - spin_unlock(&ssi->lock); + spin_unlock_bh(&ssi->lock); ssip_xmit(cl); } @@ -775,22 +775,22 @@ static void ssip_rx_strans(struct hsi_client *cl, u32 cmd) int len = SSIP_PDU_LENGTH(cmd); dev_dbg(&cl->device, "RX strans: %d frames\n", len); - spin_lock(&ssi->lock); + spin_lock_bh(&ssi->lock); if (unlikely(ssi->main_state != ACTIVE)) { dev_err(&cl->device, "START TRANS wrong state: S(%d) M(%d)\n", ssi->send_state, ssi->main_state); - spin_unlock(&ssi->lock); + spin_unlock_bh(&ssi->lock); return; } ssip_set_rxstate(ssi, RECEIVING); if (unlikely(SSIP_MSG_ID(cmd) != ssi->rxid)) { dev_err(&cl->device, "START TRANS id %d expected %d\n", SSIP_MSG_ID(cmd), ssi->rxid); - spin_unlock(&ssi->lock); + spin_unlock_bh(&ssi->lock); goto out1; } ssi->rxid++; - spin_unlock(&ssi->lock); + spin_unlock_bh(&ssi->lock); skb = netdev_alloc_skb(ssi->netdev, len * 4); if (unlikely(!skb)) { dev_err(&cl->device, "No memory for rx skb\n"); @@ -858,7 +858,7 @@ static void ssip_swbreak_complete(struct hsi_msg *msg) struct ssi_protocol *ssi = hsi_client_drvdata(cl); ssip_release_cmd(msg); - spin_lock(&ssi->lock); + spin_lock_bh(&ssi->lock); if (list_empty(&ssi->txqueue)) { if (atomic_read(&ssi->tx_usecnt)) { ssip_set_txstate(ssi, SEND_READY); @@ -866,9 +866,9 @@ static void ssip_swbreak_complete(struct hsi_msg *msg) ssip_set_txstate(ssi, SEND_IDLE); hsi_stop_tx(cl); } - spin_unlock(&ssi->lock); + spin_unlock_bh(&ssi->lock); } else { - spin_unlock(&ssi->lock); + spin_unlock_bh(&ssi->lock); ssip_xmit(cl); } netif_wake_queue(ssi->netdev); @@ -885,17 +885,17 @@ static void ssip_tx_data_complete(struct hsi_msg *msg) ssip_error(cl); goto out; } - spin_lock(&ssi->lock); + spin_lock_bh(&ssi->lock); if (list_empty(&ssi->txqueue)) { ssip_set_txstate(ssi, SENDING_SWBREAK); - spin_unlock(&ssi->lock); + spin_unlock_bh(&ssi->lock); cmsg = ssip_claim_cmd(ssi); ssip_set_cmd(cmsg, SSIP_SWBREAK_CMD); cmsg->complete = ssip_swbreak_complete; dev_dbg(&cl->device, "Send SWBREAK\n"); hsi_async_write(cl, cmsg); } else { - spin_unlock(&ssi->lock); + spin_unlock_bh(&ssi->lock); ssip_xmit(cl); } out: |