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| author | Alexander Usyskin <alexander.usyskin@intel.com> | 2016-02-07 23:35:21 +0200 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2016-02-07 14:47:20 -0800 |
| commit | 5ba0bf476c792b91543da77e0bdec311b0eaa8f7 (patch) | |
| tree | b6507792959bb0f4a828cc5e56e20dc88836493a /drivers/misc/mei | |
| parent | 1f7e489a285c8b1aca9a7b66a55bbc95eb031721 (diff) | |
| download | linux-5ba0bf476c792b91543da77e0bdec311b0eaa8f7.tar.bz2 | |
mei: amthif: don't copy from an empty buffer
If empty message come from FW (buf_idx == 0) then the current code will
still try to copy data from not filled buffer to the user-space,
instead the code should behave the same as when end of a message
has been reached, clean resources and return 0
Signed-off-by: Alexander Usyskin <alexander.usyskin@intel.com>
Signed-off-by: Tomas Winkler <tomas.winkler@intel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'drivers/misc/mei')
| -rw-r--r-- | drivers/misc/mei/amthif.c | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/drivers/misc/mei/amthif.c b/drivers/misc/mei/amthif.c index b753df98b476..c3f514027c80 100644 --- a/drivers/misc/mei/amthif.c +++ b/drivers/misc/mei/amthif.c @@ -185,7 +185,7 @@ int mei_amthif_read(struct mei_device *dev, struct file *file, /* if the whole message will fit remove it from the list */ if (cb->buf_idx >= *offset && length >= (cb->buf_idx - *offset)) list_del_init(&cb->list); - else if (cb->buf_idx > 0 && cb->buf_idx <= *offset) { + else if (cb->buf_idx <= *offset) { /* end of the message has been reached */ list_del_init(&cb->list); rets = 0; |