From: Biju Das Date: Tue, 25 Oct 2022 15:56:56 +0000 (+0100) Subject: can: rcar_canfd: fix channel specific IRQ handling for RZ/G2L X-Git-Url: http://git.maquefel.me/?a=commitdiff_plain;h=17ff99e2240c6f35fd3981383fd9de991a266ff0;p=linux.git can: rcar_canfd: fix channel specific IRQ handling for RZ/G2L commit d887087c896881715c1a82f1d4f71fbfe5344ffd upstream. RZ/G2L has separate channel specific IRQs for transmit and error interrupts. But the IRQ handler processes both channels, even if there no interrupt occurred on one of the channels. This patch fixes the issue by passing a channel specific context parameter instead of global one for the IRQ register and the IRQ handler, it just handles the channel which is triggered the interrupt. Fixes: 76e9353a80e9 ("can: rcar_canfd: Add support for RZ/G2L family") Signed-off-by: Biju Das Link: https://lore.kernel.org/all/20221025155657.1426948-3-biju.das.jz@bp.renesas.com Cc: stable@vger.kernel.org [mkl: adjust commit message] Signed-off-by: Marc Kleine-Budde [biju: fixed the conflicts manually] Signed-off-by: Biju Das Signed-off-by: Greg Kroah-Hartman --- diff --git a/drivers/net/can/rcar/rcar_canfd.c b/drivers/net/can/rcar/rcar_canfd.c index 2f44c567ebd73..36d3fc6452eef 100644 --- a/drivers/net/can/rcar/rcar_canfd.c +++ b/drivers/net/can/rcar/rcar_canfd.c @@ -1195,11 +1195,9 @@ static void rcar_canfd_handle_channel_tx(struct rcar_canfd_global *gpriv, u32 ch static irqreturn_t rcar_canfd_channel_tx_interrupt(int irq, void *dev_id) { - struct rcar_canfd_global *gpriv = dev_id; - u32 ch; + struct rcar_canfd_channel *priv = dev_id; - for_each_set_bit(ch, &gpriv->channels_mask, RCANFD_NUM_CHANNELS) - rcar_canfd_handle_channel_tx(gpriv, ch); + rcar_canfd_handle_channel_tx(priv->gpriv, priv->channel); return IRQ_HANDLED; } @@ -1227,11 +1225,9 @@ static void rcar_canfd_handle_channel_err(struct rcar_canfd_global *gpriv, u32 c static irqreturn_t rcar_canfd_channel_err_interrupt(int irq, void *dev_id) { - struct rcar_canfd_global *gpriv = dev_id; - u32 ch; + struct rcar_canfd_channel *priv = dev_id; - for_each_set_bit(ch, &gpriv->channels_mask, RCANFD_NUM_CHANNELS) - rcar_canfd_handle_channel_err(gpriv, ch); + rcar_canfd_handle_channel_err(priv->gpriv, priv->channel); return IRQ_HANDLED; } @@ -1649,6 +1645,7 @@ static int rcar_canfd_channel_probe(struct rcar_canfd_global *gpriv, u32 ch, priv->ndev = ndev; priv->base = gpriv->base; priv->channel = ch; + priv->gpriv = gpriv; priv->can.clock.freq = fcan_freq; dev_info(&pdev->dev, "can_clk rate is %u\n", priv->can.clock.freq); @@ -1677,7 +1674,7 @@ static int rcar_canfd_channel_probe(struct rcar_canfd_global *gpriv, u32 ch, } err = devm_request_irq(&pdev->dev, err_irq, rcar_canfd_channel_err_interrupt, 0, - irq_name, gpriv); + irq_name, priv); if (err) { dev_err(&pdev->dev, "devm_request_irq CH Err(%d) failed, error %d\n", err_irq, err); @@ -1691,7 +1688,7 @@ static int rcar_canfd_channel_probe(struct rcar_canfd_global *gpriv, u32 ch, } err = devm_request_irq(&pdev->dev, tx_irq, rcar_canfd_channel_tx_interrupt, 0, - irq_name, gpriv); + irq_name, priv); if (err) { dev_err(&pdev->dev, "devm_request_irq Tx (%d) failed, error %d\n", tx_irq, err); @@ -1715,7 +1712,6 @@ static int rcar_canfd_channel_probe(struct rcar_canfd_global *gpriv, u32 ch, priv->can.do_set_mode = rcar_canfd_do_set_mode; priv->can.do_get_berr_counter = rcar_canfd_get_berr_counter; - priv->gpriv = gpriv; SET_NETDEV_DEV(ndev, &pdev->dev); netif_napi_add(ndev, &priv->napi, rcar_canfd_rx_poll,