diff options
Diffstat (limited to 'drivers/i2c')
| -rw-r--r-- | drivers/i2c/busses/i2c-amd-mp2-pci.c | 2 | ||||
| -rw-r--r-- | drivers/i2c/busses/i2c-aspeed.c | 5 | ||||
| -rw-r--r-- | drivers/i2c/busses/i2c-bcm-iproc.c | 3 | ||||
| -rw-r--r-- | drivers/i2c/busses/i2c-tegra.c | 36 |
4 files changed, 20 insertions, 26 deletions
diff --git a/drivers/i2c/busses/i2c-amd-mp2-pci.c b/drivers/i2c/busses/i2c-amd-mp2-pci.c index 5e4800d72e00..cd3fd5ee5f65 100644 --- a/drivers/i2c/busses/i2c-amd-mp2-pci.c +++ b/drivers/i2c/busses/i2c-amd-mp2-pci.c @@ -349,12 +349,12 @@ static int amd_mp2_pci_probe(struct pci_dev *pci_dev, if (!privdata) return -ENOMEM; + privdata->pci_dev = pci_dev; rc = amd_mp2_pci_init(privdata, pci_dev); if (rc) return rc; mutex_init(&privdata->c2p_lock); - privdata->pci_dev = pci_dev; pm_runtime_set_autosuspend_delay(&pci_dev->dev, 1000); pm_runtime_use_autosuspend(&pci_dev->dev); diff --git a/drivers/i2c/busses/i2c-aspeed.c b/drivers/i2c/busses/i2c-aspeed.c index 07c1993274c5..f51702d86a90 100644 --- a/drivers/i2c/busses/i2c-aspeed.c +++ b/drivers/i2c/busses/i2c-aspeed.c @@ -603,6 +603,7 @@ static irqreturn_t aspeed_i2c_bus_irq(int irq, void *dev_id) /* Ack all interrupts except for Rx done */ writel(irq_received & ~ASPEED_I2CD_INTR_RX_DONE, bus->base + ASPEED_I2C_INTR_STS_REG); + readl(bus->base + ASPEED_I2C_INTR_STS_REG); irq_remaining = irq_received; #if IS_ENABLED(CONFIG_I2C_SLAVE) @@ -645,9 +646,11 @@ static irqreturn_t aspeed_i2c_bus_irq(int irq, void *dev_id) irq_received, irq_handled); /* Ack Rx done */ - if (irq_received & ASPEED_I2CD_INTR_RX_DONE) + if (irq_received & ASPEED_I2CD_INTR_RX_DONE) { writel(ASPEED_I2CD_INTR_RX_DONE, bus->base + ASPEED_I2C_INTR_STS_REG); + readl(bus->base + ASPEED_I2C_INTR_STS_REG); + } spin_unlock(&bus->lock); return irq_remaining ? IRQ_NONE : IRQ_HANDLED; } diff --git a/drivers/i2c/busses/i2c-bcm-iproc.c b/drivers/i2c/busses/i2c-bcm-iproc.c index 44be0926b566..d091a12596ad 100644 --- a/drivers/i2c/busses/i2c-bcm-iproc.c +++ b/drivers/i2c/busses/i2c-bcm-iproc.c @@ -360,6 +360,9 @@ static bool bcm_iproc_i2c_slave_isr(struct bcm_iproc_i2c_dev *iproc_i2c, value = (u8)((val >> S_RX_DATA_SHIFT) & S_RX_DATA_MASK); i2c_slave_event(iproc_i2c->slave, I2C_SLAVE_WRITE_RECEIVED, &value); + if (rx_status == I2C_SLAVE_RX_END) + i2c_slave_event(iproc_i2c->slave, + I2C_SLAVE_STOP, &value); } } else if (status & BIT(IS_S_TX_UNDERRUN_SHIFT)) { /* Master read other than start */ diff --git a/drivers/i2c/busses/i2c-tegra.c b/drivers/i2c/busses/i2c-tegra.c index 8280ac7cc1b7..4c4d17ddc96b 100644 --- a/drivers/i2c/busses/i2c-tegra.c +++ b/drivers/i2c/busses/i2c-tegra.c @@ -996,13 +996,14 @@ tegra_i2c_poll_completion_timeout(struct tegra_i2c_dev *i2c_dev, do { u32 status = i2c_readl(i2c_dev, I2C_INT_STATUS); - if (status) + if (status) { tegra_i2c_isr(i2c_dev->irq, i2c_dev); - if (completion_done(complete)) { - s64 delta = ktime_ms_delta(ktimeout, ktime); + if (completion_done(complete)) { + s64 delta = ktime_ms_delta(ktimeout, ktime); - return msecs_to_jiffies(delta) ?: 1; + return msecs_to_jiffies(delta) ?: 1; + } } ktime = ktime_get(); @@ -1029,18 +1030,14 @@ tegra_i2c_wait_completion_timeout(struct tegra_i2c_dev *i2c_dev, disable_irq(i2c_dev->irq); /* - * Under some rare circumstances (like running KASAN + - * NFS root) CPU, which handles interrupt, may stuck in - * uninterruptible state for a significant time. In this - * case we will get timeout if I2C transfer is running on - * a sibling CPU, despite of IRQ being raised. - * - * In order to handle this rare condition, the IRQ status - * needs to be checked after timeout. + * There is a chance that completion may happen after IRQ + * synchronization, which is done by disable_irq(). */ - if (ret == 0) - ret = tegra_i2c_poll_completion_timeout(i2c_dev, - complete, 0); + if (ret == 0 && completion_done(complete)) { + dev_warn(i2c_dev->dev, + "completion done after timeout\n"); + ret = 1; + } } return ret; @@ -1219,15 +1216,6 @@ static int tegra_i2c_xfer_msg(struct tegra_i2c_dev *i2c_dev, time_left = tegra_i2c_wait_completion_timeout( i2c_dev, &i2c_dev->dma_complete, xfer_time); - /* - * Synchronize DMA first, since dmaengine_terminate_sync() - * performs synchronization after the transfer's termination - * and we want to get a completion if transfer succeeded. - */ - dmaengine_synchronize(i2c_dev->msg_read ? - i2c_dev->rx_dma_chan : - i2c_dev->tx_dma_chan); - dmaengine_terminate_sync(i2c_dev->msg_read ? i2c_dev->rx_dma_chan : i2c_dev->tx_dma_chan); |