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mei: fix ssize_t to int assignment in read and write ops.

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Use ssize_t for rets variables in mei_write(), mei_read(), and
mei_cl_write() as well as change the return type of mei_cl_write()
to ssize_t, to prevent assignment of possible 64bit size_t
to int 32 bit variable.

As by product also eliminate warning
drivers/misc/mei/client.c:1702:11: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]

Signed-off-by: Tomas Winkler <tomas.winkler@intel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Tomas Winkler
2018-07-12 17:10:10 +03:00
committed by Greg Kroah-Hartman
parent 44c98df018
commit 5151e2b578
3 changed files with 17 additions and 17 deletions
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22
drivers/misc/mei/client.c
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@@ -1644,13 +1644,13 @@ err:
*
* Return: number of bytes sent on success, <0 on failure.
*/
int mei_cl_write(struct mei_cl *cl, struct mei_cl_cb *cb)
ssize_t mei_cl_write(struct mei_cl *cl, struct mei_cl_cb *cb)
{
struct mei_device *dev;
struct mei_msg_data *buf;
struct mei_msg_hdr mei_hdr;
int size;
int rets;
size_t len;
ssize_t rets;
bool blocking;
if (WARN_ON(!cl || !cl->dev))
@@ -1662,15 +1662,15 @@ int mei_cl_write(struct mei_cl *cl, struct mei_cl_cb *cb)
dev = cl->dev;
buf = &cb->buf;
size = buf->size;
len = buf->size;
blocking = cb->blocking;
cl_dbg(dev, cl, "size=%d\n", size);
cl_dbg(dev, cl, "len=%zd\n", len);
rets = pm_runtime_get(dev->dev);
if (rets < 0 && rets != -EINPROGRESS) {
pm_runtime_put_noidle(dev->dev);
cl_err(dev, cl, "rpm: get failed %d\n", rets);
cl_err(dev, cl, "rpm: get failed %zd\n", rets);
goto free;
}
@@ -1689,21 +1689,21 @@ int mei_cl_write(struct mei_cl *cl, struct mei_cl_cb *cb)
if (rets == 0) {
cl_dbg(dev, cl, "No flow control credentials: not sending.\n");
rets = size;
rets = len;
goto out;
}
if (!mei_hbuf_acquire(dev)) {
cl_dbg(dev, cl, "Cannot acquire the host buffer: not sending.\n");
rets = size;
rets = len;
goto out;
}
/* Check for a maximum length */
if (size > mei_hbuf_max_len(dev)) {
if (len > mei_hbuf_max_len(dev)) {
mei_hdr.length = mei_hbuf_max_len(dev);
mei_hdr.msg_complete = 0;
} else {
mei_hdr.length = size;
mei_hdr.length = len;
mei_hdr.msg_complete = 1;
}
@@ -1745,7 +1745,7 @@ out:
}
}
rets = size;
rets = len;
err:
cl_dbg(dev, cl, "rpm: autosuspend\n");
pm_runtime_mark_last_busy(dev->dev);