Commit 63365342 authored by Sławomir Demeszko's avatar Sławomir Demeszko Committed by Luis Henriques

staging: gdm724x: Correction of variable usage after applying ALIGN()

commit 892c89d5 upstream.

Fix regression introduced by commit <29ef8a53>. 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: default avatarSławomir Demeszko <s.demeszko@wireless-instruments.com>
Signed-off-by: default avatarGreg Kroah-Hartman <gregkh@linuxfoundation.org>
Signed-off-by: default avatarLuis Henriques <luis.henriques@canonical.com>
parent fead6438
......@@ -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;
......
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