The current implementation uses wait_for_completion(), which can cause the caller to hang indefinitely if the transfer never completes.
Switch to wait_for_completion_interruptible() so that the operation can be interrupted by signals. Signed-off-by: Viresh Kumar <[email protected]> --- drivers/i2c/busses/i2c-virtio.c | 15 ++++++++------- 1 file changed, 8 insertions(+), 7 deletions(-) diff --git a/drivers/i2c/busses/i2c-virtio.c b/drivers/i2c/busses/i2c-virtio.c index 2a351f961b89..c8c40ff9765d 100644 --- a/drivers/i2c/busses/i2c-virtio.c +++ b/drivers/i2c/busses/i2c-virtio.c @@ -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; -- 2.31.1.272.g89b43f80a514
