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| author |   Tomas Winkler <tomas.winkler@intel.com> | 2013-04-19 22:01:35 +0300 |
|---|---|---|
| committer |   Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2013-04-19 13:38:38 -0700 |
| commit | fcb136e1ac5774909e0d85189f721b8dfa800e0f (patch) | |
| tree | ac89a706d67783063d4f752c3acddc04c5ab10e8 /drivers/misc/mei/main.c | |
| parent | mei: revamp mei_irq_read_client_message function (diff) | |
| download | linux-dev-fcb136e1ac5774909e0d85189f721b8dfa800e0f.tar.xz linux-dev-fcb136e1ac5774909e0d85189f721b8dfa800e0f.zip | |
mei: fix reading large reposnes
While writting to device is limitted to max_msg_length advertized
in client properites the read can be much longer delivered consequiting chunks.
We use krealloc to enlarge the buffer when needed.
Signed-off-by: Tomas Winkler <tomas.winkler@intel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to '')
| -rw-r--r-- | drivers/misc/mei/main.c | 7 |
1 files changed, 3 insertions, 4 deletions
diff --git a/drivers/misc/mei/main.c b/drivers/misc/mei/main.c index 78b4da5ed96c..7c44c8dbae42 100644 --- a/drivers/misc/mei/main.c +++ b/drivers/misc/mei/main.c @@ -244,7 +244,7 @@ static ssize_t mei_read(struct file *file, char __user *ubuf, goto out; } - err = mei_cl_read_start(cl); + err = mei_cl_read_start(cl, length); if (err && err != -EBUSY) { dev_dbg(&dev->pdev->dev, "mei start read failure with status = %d\n", err); @@ -292,9 +292,8 @@ static ssize_t mei_read(struct file *file, char __user *ubuf, } /* now copy the data to user space */ copy_buffer: - dev_dbg(&dev->pdev->dev, "cb->response_buffer size - %d\n", - cb->response_buffer.size); - dev_dbg(&dev->pdev->dev, "cb->buf_idx - %lu\n", cb->buf_idx); + dev_dbg(&dev->pdev->dev, "buf.size = %d buf.idx= %ld\n", + cb->response_buffer.size, cb->buf_idx); if (length == 0 || ubuf == NULL || *offset > cb->buf_idx) { rets = -EMSGSIZE; goto free; |