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i3c: master: Reject IBI requests from non-IBI-capable devices

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i3c_device_request_ibi() does not verify that a device advertises IBI
support before attempting to set up IBI handling.

Add a check for I3C_BCR_IBI_REQ_CAP and fail with -EOPNOTSUPP when IBI
support is not reported by the device.  This keeps IBI setup consistent
with other IBI-related functionality, such as exposing wakeup capability
only for IBI-capable devices.

Signed-off-by: Adrian Hunter <adrian.hunter@intel.com>
Reviewed-by: Frank Li <Frank.Li@nxp.com>
Link: https://patch.msgid.link/20260807145638.168865-12-adrian.hunter@intel.com
Signed-off-by: Alexandre Belloni <alexandre.belloni@bootlin.com>
This commit is contained in:
Adrian Hunter
2026-08-07 17:56:35 +03:00
committed by Alexandre Belloni
parent 60ff731f06
commit 087efc8e88
1 changed files with 5 additions and 3 deletions
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8
drivers/i3c/device.c
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@@ -204,12 +204,14 @@ int i3c_device_request_ibi(struct i3c_device *dev,
return ret;
i3c_bus_normaluse_lock(dev->bus);
if (dev->desc) {
if (!dev->desc) {
ret = -ENOENT;
} else if (!(dev->desc->info.bcr & I3C_BCR_IBI_REQ_CAP)) {
ret = -EOPNOTSUPP;
} else {
mutex_lock(&dev->desc->ibi_lock);
ret = i3c_dev_request_ibi_locked(dev->desc, req);
mutex_unlock(&dev->desc->ibi_lock);
} else {
ret = -ENOENT;
}
i3c_bus_normaluse_unlock(dev->bus);