diff options
| author | Sławomir Demeszko <s.demeszko@wireless-instruments.com> | 2015-05-05 17:49:54 +0200 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2015-05-10 15:23:02 +0200 |
| commit | 892c89d5d7ffd1bb794fe54d86c0eef18d215fab (patch) | |
| tree | e005acc8f0235b075742812d6dc67346710f4786 | |
| parent | 664a5c1d1e33cd89cb7883e8c74638cc482b5da7 (diff) | |
staging: gdm724x: Correction of variable usage after applying ALIGN()
Fix regression introduced by commit <29ef8a53542a>. After it writing
AT commands to /dev/GCT-ATM0 is unsuccessful (no echo, no response)
and dmesg show "gdmtty: invalid payload : 1 16 f011".
Before that commit value of dummy_cnt was only a padding size. After using
ALIGN() this value is increased by its first argument. So the following
usage of this variable needs correction.
Signed-off-by: Sławomir Demeszko <s.demeszko@wireless-instruments.com>
Cc: stable <stable@vger.kernel.org> # 3.14+
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
| -rw-r--r-- | drivers/staging/gdm724x/gdm_mux.c | 16 |
1 files changed, 7 insertions, 9 deletions
diff --git a/drivers/staging/gdm724x/gdm_mux.c b/drivers/staging/gdm724x/gdm_mux.c index 8199b0a697bb..1cf24e4edf25 100644 --- a/drivers/staging/gdm724x/gdm_mux.c +++ b/drivers/staging/gdm724x/gdm_mux.c @@ -158,7 +158,7 @@ static int up_to_host(struct mux_rx *r) unsigned int start_flag; unsigned int payload_size; unsigned short packet_type; - int dummy_cnt; + int total_len; u32 packet_size_sum = r->offset; int index; int ret = TO_HOST_INVALID_PACKET; @@ -176,10 +176,10 @@ static int up_to_host(struct mux_rx *r) break; } - dummy_cnt = ALIGN(MUX_HEADER_SIZE + payload_size, 4); + total_len = ALIGN(MUX_HEADER_SIZE + payload_size, 4); if (len - packet_size_sum < - MUX_HEADER_SIZE + payload_size + dummy_cnt) { + total_len) { pr_err("invalid payload : %d %d %04x\n", payload_size, len, packet_type); break; @@ -202,7 +202,7 @@ static int up_to_host(struct mux_rx *r) break; } - packet_size_sum += MUX_HEADER_SIZE + payload_size + dummy_cnt; + packet_size_sum += total_len; if (len - packet_size_sum <= MUX_HEADER_SIZE + 2) { ret = r->callback(NULL, 0, @@ -361,7 +361,6 @@ static int gdm_mux_send(void *priv_dev, void *data, int len, int tty_index, struct mux_pkt_header *mux_header; struct mux_tx *t = NULL; static u32 seq_num = 1; - int dummy_cnt; int total_len; int ret; unsigned long flags; @@ -374,9 +373,7 @@ static int gdm_mux_send(void *priv_dev, void *data, int len, int tty_index, spin_lock_irqsave(&mux_dev->write_lock, flags); - dummy_cnt = ALIGN(MUX_HEADER_SIZE + len, 4); - - total_len = len + MUX_HEADER_SIZE + dummy_cnt; + total_len = ALIGN(MUX_HEADER_SIZE + len, 4); t = alloc_mux_tx(total_len); if (!t) { @@ -392,7 +389,8 @@ static int gdm_mux_send(void *priv_dev, void *data, int len, int tty_index, mux_header->packet_type = __cpu_to_le16(packet_type[tty_index]); memcpy(t->buf+MUX_HEADER_SIZE, data, len); - memset(t->buf+MUX_HEADER_SIZE+len, 0, dummy_cnt); + memset(t->buf+MUX_HEADER_SIZE+len, 0, total_len - MUX_HEADER_SIZE - + len); t->len = total_len; t->callback = cb; |