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i2c-host-fixes for v6.16-rc8

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qup: avoid potential hang when waiting for bus idle
 tegra: improve ACPI reset error handling
 virtio: use interruptible wait to prevent hang during transfer
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Merge tag 'i2c-host-fixes-6.16-rc8' of git://git.kernel.org/pub/scm/linux/kernel/git/andi.shyti/linux into i2c/for-current

i2c-host-fixes for v6.16-rc8

qup: avoid potential hang when waiting for bus idle
tegra: improve ACPI reset error handling
virtio: use interruptible wait to prevent hang during transfer
This commit is contained in:
Wolfram Sang 2025-07-26 00:59:39 +02:00
commit 31f08841dd
3 changed files with 12 additions and 31 deletions
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4
drivers/i2c/busses/i2c-qup.c
View File

@ -452,8 +452,10 @@ static int qup_i2c_bus_active(struct qup_i2c_dev *qup, int len)
if (!(status & I2C_STATUS_BUS_ACTIVE))
break;
if (time_after(jiffies, timeout))
if (time_after(jiffies, timeout)) {
ret = -ETIMEDOUT;
break;
}
usleep_range(len, len * 2);
}

24
drivers/i2c/busses/i2c-tegra.c
View File

@ -607,7 +607,6 @@ static int tegra_i2c_wait_for_config_load(struct tegra_i2c_dev *i2c_dev)
static int tegra_i2c_init(struct tegra_i2c_dev *i2c_dev)
{
u32 val, clk_divisor, clk_multiplier, tsu_thd, tlow, thigh, non_hs_mode;
acpi_handle handle = ACPI_HANDLE(i2c_dev->dev);
struct i2c_timings *t = &i2c_dev->timings;
int err;
@ -619,11 +618,7 @@ static int tegra_i2c_init(struct tegra_i2c_dev *i2c_dev)
* emit a noisy warning on error, which won't stay unnoticed and
* won't hose machine entirely.
*/
if (handle)
err = acpi_evaluate_object(handle, "_RST", NULL, NULL);
else
err = reset_control_reset(i2c_dev->rst);
err = device_reset(i2c_dev->dev);
WARN_ON_ONCE(err);
if (IS_DVC(i2c_dev))
@ -1666,19 +1661,6 @@ static void tegra_i2c_parse_dt(struct tegra_i2c_dev *i2c_dev)
i2c_dev->is_vi = true;
}
static int tegra_i2c_init_reset(struct tegra_i2c_dev *i2c_dev)
{
if (ACPI_HANDLE(i2c_dev->dev))
return 0;
i2c_dev->rst = devm_reset_control_get_exclusive(i2c_dev->dev, "i2c");
if (IS_ERR(i2c_dev->rst))
return dev_err_probe(i2c_dev->dev, PTR_ERR(i2c_dev->rst),
"failed to get reset control\n");
return 0;
}
static int tegra_i2c_init_clocks(struct tegra_i2c_dev *i2c_dev)
{
int err;
@ -1788,10 +1770,6 @@ static int tegra_i2c_probe(struct platform_device *pdev)
tegra_i2c_parse_dt(i2c_dev);
err = tegra_i2c_init_reset(i2c_dev);
if (err)
return err;
err = tegra_i2c_init_clocks(i2c_dev);
if (err)
return err;

15
drivers/i2c/busses/i2c-virtio.c
View File

@ -116,15 +116,16 @@ static int virtio_i2c_complete_reqs(struct virtqueue *vq,
for (i = 0; i < num; i++) {
struct virtio_i2c_req *req = &reqs[i];
wait_for_completion(&req->completion);
if (!failed && req->in_hdr.status != VIRTIO_I2C_MSG_OK)
failed = true;
if (!failed) {
if (wait_for_completion_interruptible(&req->completion))
failed = true;
else if (req->in_hdr.status != VIRTIO_I2C_MSG_OK)
failed = true;
else
j++;
}
i2c_put_dma_safe_msg_buf(reqs[i].buf, &msgs[i], !failed);
if (!failed)
j++;
}
return j;