diff options
author | Sujoy Ray <sujoy.ray@intel.com> | 2022-03-11 21:43:25 +0300 |
---|---|---|
committer | Sujoy Ray <sujoy.ray@intel.com> | 2022-03-11 23:10:46 +0300 |
commit | 875e0c507c6de68fb61d2042041303d716bbcd30 (patch) | |
tree | cec6c4d2af2a5f53e6b16c8c391f880d8b864aa5 /drivers/i2c | |
parent | d640749c5f44fac25f8bd109c16ecadb5b79da97 (diff) | |
parent | 2befcc6bb0bb1e0a4a31391a359adcab3925b6e4 (diff) | |
download | linux-875e0c507c6de68fb61d2042041303d716bbcd30.tar.xz |
Merge commit '2befcc6bb0bb1e0a4a31391a359adcab3925b6e4' of https://github.com/openbmc/linux into openbmc/linux_5.15.24_bump
Signed-off-by: Sujoy Ray <sujoy.ray@intel.com>
Diffstat (limited to 'drivers/i2c')
-rw-r--r-- | drivers/i2c/busses/i2c-cbus-gpio.c | 5 | ||||
-rw-r--r-- | drivers/i2c/busses/i2c-designware-pcidrv.c | 8 | ||||
-rw-r--r-- | drivers/i2c/busses/i2c-i801.c | 20 | ||||
-rw-r--r-- | drivers/i2c/busses/i2c-mpc.c | 40 | ||||
-rw-r--r-- | drivers/i2c/busses/i2c-mt65xx.c | 2 | ||||
-rw-r--r-- | drivers/i2c/busses/i2c-rk3x.c | 4 | ||||
-rw-r--r-- | drivers/i2c/busses/i2c-stm32f7.c | 31 | ||||
-rw-r--r-- | drivers/i2c/busses/i2c-virtio.c | 44 | ||||
-rw-r--r-- | drivers/i2c/busses/i2c-xlr.c | 6 | ||||
-rw-r--r-- | drivers/i2c/i2c-core-base.c | 95 | ||||
-rw-r--r-- | drivers/i2c/i2c-dev.c | 3 |
11 files changed, 94 insertions, 164 deletions
diff --git a/drivers/i2c/busses/i2c-cbus-gpio.c b/drivers/i2c/busses/i2c-cbus-gpio.c index 72df563477b1..f8639a4457d2 100644 --- a/drivers/i2c/busses/i2c-cbus-gpio.c +++ b/drivers/i2c/busses/i2c-cbus-gpio.c @@ -195,8 +195,9 @@ static u32 cbus_i2c_func(struct i2c_adapter *adapter) } static const struct i2c_algorithm cbus_i2c_algo = { - .smbus_xfer = cbus_i2c_smbus_xfer, - .functionality = cbus_i2c_func, + .smbus_xfer = cbus_i2c_smbus_xfer, + .smbus_xfer_atomic = cbus_i2c_smbus_xfer, + .functionality = cbus_i2c_func, }; static int cbus_i2c_remove(struct platform_device *pdev) diff --git a/drivers/i2c/busses/i2c-designware-pcidrv.c b/drivers/i2c/busses/i2c-designware-pcidrv.c index 0f409a4c2da0..5b45941bcbdd 100644 --- a/drivers/i2c/busses/i2c-designware-pcidrv.c +++ b/drivers/i2c/busses/i2c-designware-pcidrv.c @@ -39,10 +39,10 @@ enum dw_pci_ctl_id_t { }; struct dw_scl_sda_cfg { - u32 ss_hcnt; - u32 fs_hcnt; - u32 ss_lcnt; - u32 fs_lcnt; + u16 ss_hcnt; + u16 fs_hcnt; + u16 ss_lcnt; + u16 fs_lcnt; u32 sda_hold; }; diff --git a/drivers/i2c/busses/i2c-i801.c b/drivers/i2c/busses/i2c-i801.c index 89ae78ef1a1c..98e39a17fb83 100644 --- a/drivers/i2c/busses/i2c-i801.c +++ b/drivers/i2c/busses/i2c-i801.c @@ -763,6 +763,11 @@ static int i801_block_transaction(struct i801_priv *priv, union i2c_smbus_data * int result = 0; unsigned char hostc; + if (read_write == I2C_SMBUS_READ && command == I2C_SMBUS_BLOCK_DATA) + data->block[0] = I2C_SMBUS_BLOCK_MAX; + else if (data->block[0] < 1 || data->block[0] > I2C_SMBUS_BLOCK_MAX) + return -EPROTO; + if (command == I2C_SMBUS_I2C_BLOCK_DATA) { if (read_write == I2C_SMBUS_WRITE) { /* set I2C_EN bit in configuration register */ @@ -776,16 +781,6 @@ static int i801_block_transaction(struct i801_priv *priv, union i2c_smbus_data * } } - if (read_write == I2C_SMBUS_WRITE - || command == I2C_SMBUS_I2C_BLOCK_DATA) { - if (data->block[0] < 1) - data->block[0] = 1; - if (data->block[0] > I2C_SMBUS_BLOCK_MAX) - data->block[0] = I2C_SMBUS_BLOCK_MAX; - } else { - data->block[0] = 32; /* max for SMBus block reads */ - } - /* Experience has shown that the block buffer can only be used for SMBus (not I2C) block transactions, even though the datasheet doesn't mention this limitation. */ @@ -1493,7 +1488,6 @@ static struct platform_device * i801_add_tco_spt(struct i801_priv *priv, struct pci_dev *pci_dev, struct resource *tco_res) { - static DEFINE_MUTEX(p2sb_mutex); struct resource *res; unsigned int devfn; u64 base64_addr; @@ -1506,7 +1500,7 @@ i801_add_tco_spt(struct i801_priv *priv, struct pci_dev *pci_dev, * enumerated by the PCI subsystem, so we need to unhide/hide it * to lookup the P2SB BAR. */ - mutex_lock(&p2sb_mutex); + pci_lock_rescan_remove(); devfn = PCI_DEVFN(PCI_SLOT(pci_dev->devfn), 1); @@ -1524,7 +1518,7 @@ i801_add_tco_spt(struct i801_priv *priv, struct pci_dev *pci_dev, /* Hide the P2SB device, if it was hidden before */ if (hidden) pci_bus_write_config_byte(pci_dev->bus, devfn, 0xe1, hidden); - mutex_unlock(&p2sb_mutex); + pci_unlock_rescan_remove(); res = &tco_res[1]; if (pci_dev->device == PCI_DEVICE_ID_INTEL_DNV_SMBUS) diff --git a/drivers/i2c/busses/i2c-mpc.c b/drivers/i2c/busses/i2c-mpc.c index a6ea1eb1394e..6c698c10d3cd 100644 --- a/drivers/i2c/busses/i2c-mpc.c +++ b/drivers/i2c/busses/i2c-mpc.c @@ -119,23 +119,30 @@ static inline void writeccr(struct mpc_i2c *i2c, u32 x) /* Sometimes 9th clock pulse isn't generated, and slave doesn't release * the bus, because it wants to send ACK. * Following sequence of enabling/disabling and sending start/stop generates - * the 9 pulses, so it's all OK. + * the 9 pulses, each with a START then ending with STOP, so it's all OK. */ static void mpc_i2c_fixup(struct mpc_i2c *i2c) { int k; - u32 delay_val = 1000000 / i2c->real_clk + 1; - - if (delay_val < 2) - delay_val = 2; + unsigned long flags; for (k = 9; k; k--) { writeccr(i2c, 0); - writeccr(i2c, CCR_MSTA | CCR_MTX | CCR_MEN); + writeb(0, i2c->base + MPC_I2C_SR); /* clear any status bits */ + writeccr(i2c, CCR_MEN | CCR_MSTA); /* START */ + readb(i2c->base + MPC_I2C_DR); /* init xfer */ + udelay(15); /* let it hit the bus */ + local_irq_save(flags); /* should not be delayed further */ + writeccr(i2c, CCR_MEN | CCR_MSTA | CCR_RSTA); /* delay SDA */ readb(i2c->base + MPC_I2C_DR); - writeccr(i2c, CCR_MEN); - udelay(delay_val << 1); + if (k != 1) + udelay(5); + local_irq_restore(flags); } + writeccr(i2c, CCR_MEN); /* Initiate STOP */ + readb(i2c->base + MPC_I2C_DR); + udelay(15); /* Let STOP propagate */ + writeccr(i2c, 0); } static int i2c_mpc_wait_sr(struct mpc_i2c *i2c, int mask) @@ -492,7 +499,7 @@ static void mpc_i2c_finish(struct mpc_i2c *i2c, int rc) static void mpc_i2c_do_action(struct mpc_i2c *i2c) { - struct i2c_msg *msg = &i2c->msgs[i2c->curr_msg]; + struct i2c_msg *msg = NULL; int dir = 0; int recv_len = 0; u8 byte; @@ -501,10 +508,13 @@ static void mpc_i2c_do_action(struct mpc_i2c *i2c) i2c->cntl_bits &= ~(CCR_RSTA | CCR_MTX | CCR_TXAK); - if (msg->flags & I2C_M_RD) - dir = 1; - if (msg->flags & I2C_M_RECV_LEN) - recv_len = 1; + if (i2c->action != MPC_I2C_ACTION_STOP) { + msg = &i2c->msgs[i2c->curr_msg]; + if (msg->flags & I2C_M_RD) + dir = 1; + if (msg->flags & I2C_M_RECV_LEN) + recv_len = 1; + } switch (i2c->action) { case MPC_I2C_ACTION_RESTART: @@ -581,7 +591,7 @@ static void mpc_i2c_do_action(struct mpc_i2c *i2c) break; } - if (msg->len == i2c->byte_posn) { + if (msg && msg->len == i2c->byte_posn) { i2c->curr_msg++; i2c->byte_posn = 0; @@ -636,7 +646,7 @@ static irqreturn_t mpc_i2c_isr(int irq, void *dev_id) status = readb(i2c->base + MPC_I2C_SR); if (status & CSR_MIF) { /* Wait up to 100us for transfer to properly complete */ - readb_poll_timeout(i2c->base + MPC_I2C_SR, status, !(status & CSR_MCF), 0, 100); + readb_poll_timeout_atomic(i2c->base + MPC_I2C_SR, status, status & CSR_MCF, 0, 100); writeb(0, i2c->base + MPC_I2C_SR); mpc_i2c_do_intr(i2c, status); return IRQ_HANDLED; diff --git a/drivers/i2c/busses/i2c-mt65xx.c b/drivers/i2c/busses/i2c-mt65xx.c index 7d4b3eb7077a..72acda59eb39 100644 --- a/drivers/i2c/busses/i2c-mt65xx.c +++ b/drivers/i2c/busses/i2c-mt65xx.c @@ -195,7 +195,7 @@ static const u16 mt_i2c_regs_v2[] = { [OFFSET_CLOCK_DIV] = 0x48, [OFFSET_SOFTRESET] = 0x50, [OFFSET_SCL_MIS_COMP_POINT] = 0x90, - [OFFSET_DEBUGSTAT] = 0xe0, + [OFFSET_DEBUGSTAT] = 0xe4, [OFFSET_DEBUGCTRL] = 0xe8, [OFFSET_FIFO_STAT] = 0xf4, [OFFSET_FIFO_THRESH] = 0xf8, diff --git a/drivers/i2c/busses/i2c-rk3x.c b/drivers/i2c/busses/i2c-rk3x.c index 819ab4ee517e..02ddb237f69a 100644 --- a/drivers/i2c/busses/i2c-rk3x.c +++ b/drivers/i2c/busses/i2c-rk3x.c @@ -423,8 +423,8 @@ static void rk3x_i2c_handle_read(struct rk3x_i2c *i2c, unsigned int ipd) if (!(ipd & REG_INT_MBRF)) return; - /* ack interrupt */ - i2c_writel(i2c, REG_INT_MBRF, REG_IPD); + /* ack interrupt (read also produces a spurious START flag, clear it too) */ + i2c_writel(i2c, REG_INT_MBRF | REG_INT_START, REG_IPD); /* Can only handle a maximum of 32 bytes at a time */ if (len > 32) diff --git a/drivers/i2c/busses/i2c-stm32f7.c b/drivers/i2c/busses/i2c-stm32f7.c index b9b19a2a2ffa..50d5ae81d227 100644 --- a/drivers/i2c/busses/i2c-stm32f7.c +++ b/drivers/i2c/busses/i2c-stm32f7.c @@ -1493,6 +1493,7 @@ static irqreturn_t stm32f7_i2c_isr_event(int irq, void *data) { struct stm32f7_i2c_dev *i2c_dev = data; struct stm32f7_i2c_msg *f7_msg = &i2c_dev->f7_msg; + struct stm32_i2c_dma *dma = i2c_dev->dma; void __iomem *base = i2c_dev->base; u32 status, mask; int ret = IRQ_HANDLED; @@ -1518,6 +1519,10 @@ static irqreturn_t stm32f7_i2c_isr_event(int irq, void *data) dev_dbg(i2c_dev->dev, "<%s>: Receive NACK (addr %x)\n", __func__, f7_msg->addr); writel_relaxed(STM32F7_I2C_ICR_NACKCF, base + STM32F7_I2C_ICR); + if (i2c_dev->use_dma) { + stm32f7_i2c_disable_dma_req(i2c_dev); + dmaengine_terminate_all(dma->chan_using); + } f7_msg->result = -ENXIO; } @@ -1533,7 +1538,7 @@ static irqreturn_t stm32f7_i2c_isr_event(int irq, void *data) /* Clear STOP flag */ writel_relaxed(STM32F7_I2C_ICR_STOPCF, base + STM32F7_I2C_ICR); - if (i2c_dev->use_dma) { + if (i2c_dev->use_dma && !f7_msg->result) { ret = IRQ_WAKE_THREAD; } else { i2c_dev->master_mode = false; @@ -1546,7 +1551,7 @@ static irqreturn_t stm32f7_i2c_isr_event(int irq, void *data) if (f7_msg->stop) { mask = STM32F7_I2C_CR2_STOP; stm32f7_i2c_set_bits(base + STM32F7_I2C_CR2, mask); - } else if (i2c_dev->use_dma) { + } else if (i2c_dev->use_dma && !f7_msg->result) { ret = IRQ_WAKE_THREAD; } else if (f7_msg->smbus) { stm32f7_i2c_smbus_rep_start(i2c_dev); @@ -1696,12 +1701,23 @@ static int stm32f7_i2c_xfer(struct i2c_adapter *i2c_adap, time_left = wait_for_completion_timeout(&i2c_dev->complete, i2c_dev->adap.timeout); ret = f7_msg->result; + if (ret) { + /* + * It is possible that some unsent data have already been + * written into TXDR. To avoid sending old data in a + * further transfer, flush TXDR in case of any error + */ + writel_relaxed(STM32F7_I2C_ISR_TXE, + i2c_dev->base + STM32F7_I2C_ISR); + goto pm_free; + } if (!time_left) { dev_dbg(i2c_dev->dev, "Access to slave 0x%x timed out\n", i2c_dev->msg->addr); if (i2c_dev->use_dma) dmaengine_terminate_all(dma->chan_using); + stm32f7_i2c_wait_free_bus(i2c_dev); ret = -ETIMEDOUT; } @@ -1744,13 +1760,22 @@ static int stm32f7_i2c_smbus_xfer(struct i2c_adapter *adapter, u16 addr, timeout = wait_for_completion_timeout(&i2c_dev->complete, i2c_dev->adap.timeout); ret = f7_msg->result; - if (ret) + if (ret) { + /* + * It is possible that some unsent data have already been + * written into TXDR. To avoid sending old data in a + * further transfer, flush TXDR in case of any error + */ + writel_relaxed(STM32F7_I2C_ISR_TXE, + i2c_dev->base + STM32F7_I2C_ISR); goto pm_free; + } if (!timeout) { dev_dbg(dev, "Access to slave 0x%x timed out\n", f7_msg->addr); if (i2c_dev->use_dma) dmaengine_terminate_all(dma->chan_using); + stm32f7_i2c_wait_free_bus(i2c_dev); ret = -ETIMEDOUT; goto pm_free; } diff --git a/drivers/i2c/busses/i2c-virtio.c b/drivers/i2c/busses/i2c-virtio.c index f10a603b13fb..5cb21d7da05b 100644 --- a/drivers/i2c/busses/i2c-virtio.c +++ b/drivers/i2c/busses/i2c-virtio.c @@ -22,24 +22,24 @@ /** * struct virtio_i2c - virtio I2C data * @vdev: virtio device for this controller - * @completion: completion of virtio I2C message * @adap: I2C adapter for this controller * @vq: the virtio virtqueue for communication */ struct virtio_i2c { struct virtio_device *vdev; - struct completion completion; struct i2c_adapter adap; struct virtqueue *vq; }; /** * struct virtio_i2c_req - the virtio I2C request structure + * @completion: completion of virtio I2C message * @out_hdr: the OUT header of the virtio I2C message * @buf: the buffer into which data is read, or from which it's written * @in_hdr: the IN header of the virtio I2C message */ struct virtio_i2c_req { + struct completion completion; struct virtio_i2c_out_hdr out_hdr ____cacheline_aligned; uint8_t *buf ____cacheline_aligned; struct virtio_i2c_in_hdr in_hdr ____cacheline_aligned; @@ -47,9 +47,11 @@ struct virtio_i2c_req { static void virtio_i2c_msg_done(struct virtqueue *vq) { - struct virtio_i2c *vi = vq->vdev->priv; + struct virtio_i2c_req *req; + unsigned int len; - complete(&vi->completion); + while ((req = virtqueue_get_buf(vq, &len))) + complete(&req->completion); } static int virtio_i2c_prepare_reqs(struct virtqueue *vq, @@ -62,6 +64,8 @@ static int virtio_i2c_prepare_reqs(struct virtqueue *vq, for (i = 0; i < num; i++) { int outcnt = 0, incnt = 0; + init_completion(&reqs[i].completion); + /* * We don't support 0 length messages and so filter out * 0 length transfers by using i2c_adapter_quirks. @@ -106,24 +110,17 @@ static int virtio_i2c_prepare_reqs(struct virtqueue *vq, static int virtio_i2c_complete_reqs(struct virtqueue *vq, struct virtio_i2c_req *reqs, - struct i2c_msg *msgs, int num, - bool timedout) + struct i2c_msg *msgs, int num) { - struct virtio_i2c_req *req; - bool failed = timedout; - unsigned int len; + bool failed = false; int i, j = 0; for (i = 0; i < num; i++) { - /* Detach the ith request from the vq */ - req = virtqueue_get_buf(vq, &len); + struct virtio_i2c_req *req = &reqs[i]; - /* - * Condition req == &reqs[i] should always meet since we have - * total num requests in the vq. reqs[i] can never be NULL here. - */ - if (!failed && (WARN_ON(req != &reqs[i]) || - req->in_hdr.status != VIRTIO_I2C_MSG_OK)) + wait_for_completion(&req->completion); + + if (!failed && req->in_hdr.status != VIRTIO_I2C_MSG_OK) failed = true; i2c_put_dma_safe_msg_buf(reqs[i].buf, &msgs[i], !failed); @@ -132,7 +129,7 @@ static int virtio_i2c_complete_reqs(struct virtqueue *vq, j++; } - return timedout ? -ETIMEDOUT : j; + return j; } static int virtio_i2c_xfer(struct i2c_adapter *adap, struct i2c_msg *msgs, @@ -141,7 +138,6 @@ static int virtio_i2c_xfer(struct i2c_adapter *adap, struct i2c_msg *msgs, struct virtio_i2c *vi = i2c_get_adapdata(adap); struct virtqueue *vq = vi->vq; struct virtio_i2c_req *reqs; - unsigned long time_left; int count; reqs = kcalloc(num, sizeof(*reqs), GFP_KERNEL); @@ -160,15 +156,9 @@ static int virtio_i2c_xfer(struct i2c_adapter *adap, struct i2c_msg *msgs, * remote here to clear the virtqueue, so we can try another set of * messages later on. */ - - reinit_completion(&vi->completion); virtqueue_kick(vq); - time_left = wait_for_completion_timeout(&vi->completion, adap->timeout); - if (!time_left) - dev_err(&adap->dev, "virtio i2c backend timeout.\n"); - - count = virtio_i2c_complete_reqs(vq, reqs, msgs, count, !time_left); + count = virtio_i2c_complete_reqs(vq, reqs, msgs, count); err_free: kfree(reqs); @@ -215,8 +205,6 @@ static int virtio_i2c_probe(struct virtio_device *vdev) vdev->priv = vi; vi->vdev = vdev; - init_completion(&vi->completion); - ret = virtio_i2c_setup_vqs(vi); if (ret) return ret; diff --git a/drivers/i2c/busses/i2c-xlr.c b/drivers/i2c/busses/i2c-xlr.c index 126d1393e548..9ce20652d494 100644 --- a/drivers/i2c/busses/i2c-xlr.c +++ b/drivers/i2c/busses/i2c-xlr.c @@ -431,11 +431,15 @@ static int xlr_i2c_probe(struct platform_device *pdev) i2c_set_adapdata(&priv->adap, priv); ret = i2c_add_numbered_adapter(&priv->adap); if (ret < 0) - return ret; + goto err_unprepare_clk; platform_set_drvdata(pdev, priv); dev_info(&priv->adap.dev, "Added I2C Bus.\n"); return 0; + +err_unprepare_clk: + clk_unprepare(clk); + return ret; } static int xlr_i2c_remove(struct platform_device *pdev) diff --git a/drivers/i2c/i2c-core-base.c b/drivers/i2c/i2c-core-base.c index be242605df91..dfc77ef4819f 100644 --- a/drivers/i2c/i2c-core-base.c +++ b/drivers/i2c/i2c-core-base.c @@ -466,14 +466,12 @@ static int i2c_smbus_host_notify_to_irq(const struct i2c_client *client) static int i2c_device_probe(struct device *dev) { struct i2c_client *client = i2c_verify_client(dev); - struct i2c_adapter *adap; struct i2c_driver *driver; int status; if (!client) return 0; - adap = client->adapter; client->irq = client->init_irq; if (!client->irq) { @@ -539,14 +537,6 @@ static int i2c_device_probe(struct device *dev) dev_dbg(dev, "probe\n"); - if (adap->bus_regulator) { - status = regulator_enable(adap->bus_regulator); - if (status < 0) { - dev_err(&adap->dev, "Failed to enable bus regulator\n"); - goto err_clear_wakeup_irq; - } - } - status = of_clk_set_defaults(dev->of_node, false); if (status < 0) goto err_clear_wakeup_irq; @@ -604,10 +594,8 @@ put_sync_adapter: static void i2c_device_remove(struct device *dev) { struct i2c_client *client = to_i2c_client(dev); - struct i2c_adapter *adap; struct i2c_driver *driver; - adap = client->adapter; driver = to_i2c_driver(dev->driver); if (driver->remove) { int status; @@ -622,8 +610,6 @@ static void i2c_device_remove(struct device *dev) devres_release_group(&client->dev, client->devres_group_id); dev_pm_domain_detach(&client->dev, true); - if (!pm_runtime_status_suspended(&client->dev) && adap->bus_regulator) - regulator_disable(adap->bus_regulator); dev_pm_clear_wake_irq(&client->dev); device_init_wakeup(&client->dev, false); @@ -633,86 +619,6 @@ static void i2c_device_remove(struct device *dev) pm_runtime_put(&client->adapter->dev); } -#ifdef CONFIG_PM_SLEEP -static int i2c_resume_early(struct device *dev) -{ - struct i2c_client *client = i2c_verify_client(dev); - int err; - - if (!client) - return 0; - - if (pm_runtime_status_suspended(&client->dev) && - client->adapter->bus_regulator) { - err = regulator_enable(client->adapter->bus_regulator); - if (err) - return err; - } - - return pm_generic_resume_early(&client->dev); -} - -static int i2c_suspend_late(struct device *dev) -{ - struct i2c_client *client = i2c_verify_client(dev); - int err; - - if (!client) - return 0; - - err = pm_generic_suspend_late(&client->dev); - if (err) - return err; - - if (!pm_runtime_status_suspended(&client->dev) && - client->adapter->bus_regulator) - return regulator_disable(client->adapter->bus_regulator); - - return 0; -} -#endif - -#ifdef CONFIG_PM -static int i2c_runtime_resume(struct device *dev) -{ - struct i2c_client *client = i2c_verify_client(dev); - int err; - - if (!client) - return 0; - - if (client->adapter->bus_regulator) { - err = regulator_enable(client->adapter->bus_regulator); - if (err) - return err; - } - - return pm_generic_runtime_resume(&client->dev); -} - -static int i2c_runtime_suspend(struct device *dev) -{ - struct i2c_client *client = i2c_verify_client(dev); - int err; - - if (!client) - return 0; - - err = pm_generic_runtime_suspend(&client->dev); - if (err) - return err; - - if (client->adapter->bus_regulator) - return regulator_disable(client->adapter->bus_regulator); - return 0; -} -#endif - -static const struct dev_pm_ops i2c_device_pm = { - SET_LATE_SYSTEM_SLEEP_PM_OPS(i2c_suspend_late, i2c_resume_early) - SET_RUNTIME_PM_OPS(i2c_runtime_suspend, i2c_runtime_resume, NULL) -}; - static void i2c_device_shutdown(struct device *dev) { struct i2c_client *client = i2c_verify_client(dev); @@ -772,7 +678,6 @@ struct bus_type i2c_bus_type = { .probe = i2c_device_probe, .remove = i2c_device_remove, .shutdown = i2c_device_shutdown, - .pm = &i2c_device_pm, }; EXPORT_SYMBOL_GPL(i2c_bus_type); diff --git a/drivers/i2c/i2c-dev.c b/drivers/i2c/i2c-dev.c index bce0e8bb7852..cf5d049342ea 100644 --- a/drivers/i2c/i2c-dev.c +++ b/drivers/i2c/i2c-dev.c @@ -535,6 +535,9 @@ static long compat_i2cdev_ioctl(struct file *file, unsigned int cmd, unsigned lo sizeof(rdwr_arg))) return -EFAULT; + if (!rdwr_arg.msgs || rdwr_arg.nmsgs == 0) + return -EINVAL; + if (rdwr_arg.nmsgs > I2C_RDWR_IOCTL_MAX_MSGS) return -EINVAL; |