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authorJeroen Hofstee2019-09-24 18:45:56 +0000
committerMarc Kleine-Budde2019-11-04 21:47:22 +0100
commit10f5d55ddcbf1c30529d90beffedcf84844d6f42 (patch)
tree109a309e437fa92d07ecbf7192f458775af39957
parent59f415c2f5e20a6859e49626e8af4de983ff111c (diff)
can: ti_hecc: keep MIM and MD set
The HECC_CANMIM is set in the xmit path and cleared in the interrupt. Since this is done with a read, modify, write action the register might end up with some more MIM enabled then intended, since it is not protected. That doesn't matter at all, since the tx interrupt disables the mailbox with HECC_CANME (while holding a spinlock). So lets just always keep MIM set. While at it, since the mailbox direction never changes, don't set it every time a message is send, ti_hecc_reset() already sets them to tx. Signed-off-by: Jeroen Hofstee <jhofstee@victronenergy.com> Signed-off-by: Marc Kleine-Budde <mkl@pengutronix.de>
-rw-r--r--drivers/net/can/ti_hecc.c6
1 files changed, 3 insertions, 3 deletions
diff --git a/drivers/net/can/ti_hecc.c b/drivers/net/can/ti_hecc.c
index eb8151154083..d6a84f8ff863 100644
--- a/drivers/net/can/ti_hecc.c
+++ b/drivers/net/can/ti_hecc.c
@@ -382,6 +382,9 @@ static void ti_hecc_start(struct net_device *ndev)
hecc_set_bit(priv, HECC_CANMIM, mbx_mask);
}
+ /* Enable tx interrupts */
+ hecc_set_bit(priv, HECC_CANMIM, BIT(HECC_MAX_TX_MBOX) - 1);
+
/* Prevent message over-write & Enable interrupts */
hecc_write(priv, HECC_CANOPC, HECC_SET_REG);
if (priv->use_hecc1int) {
@@ -511,8 +514,6 @@ static netdev_tx_t ti_hecc_xmit(struct sk_buff *skb, struct net_device *ndev)
hecc_set_bit(priv, HECC_CANME, mbx_mask);
spin_unlock_irqrestore(&priv->mbx_lock, flags);
- hecc_clear_bit(priv, HECC_CANMD, mbx_mask);
- hecc_set_bit(priv, HECC_CANMIM, mbx_mask);
hecc_write(priv, HECC_CANTRS, mbx_mask);
return NETDEV_TX_OK;
@@ -676,7 +677,6 @@ static irqreturn_t ti_hecc_interrupt(int irq, void *dev_id)
mbx_mask = BIT(mbxno);
if (!(mbx_mask & hecc_read(priv, HECC_CANTA)))
break;
- hecc_clear_bit(priv, HECC_CANMIM, mbx_mask);
hecc_write(priv, HECC_CANTA, mbx_mask);
spin_lock_irqsave(&priv->mbx_lock, flags);
hecc_clear_bit(priv, HECC_CANME, mbx_mask);