6.1-stable review patch. If anyone has any objections, please let me know.
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From: Viresh Kumar viresh.kumar@linaro.org
commit a663b3c47ab10f66130818cf94eb59c971541c3f upstream.
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.
Fixes: 84e1d0bf1d71 ("i2c: virtio: disable timeout handling") Signed-off-by: Viresh Kumar viresh.kumar@linaro.org Cc: stable@vger.kernel.org # v5.16+ Signed-off-by: Andi Shyti andi.shyti@kernel.org Link: https://lore.kernel.org/r/b8944e9cab8eb959d888ae80add6f2a686159ba2.175154196... Signed-off-by: Greg Kroah-Hartman gregkh@linuxfoundation.org --- drivers/i2c/busses/i2c-virtio.c | 15 ++++++++------- 1 file changed, 8 insertions(+), 7 deletions(-)
--- a/drivers/i2c/busses/i2c-virtio.c +++ b/drivers/i2c/busses/i2c-virtio.c @@ -116,15 +116,16 @@ static int virtio_i2c_complete_reqs(stru 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;