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Subject[PATCH AUTOSEL 4.19 48/56] tty: ipwireless: fix error handling
Date
From: Tong Zhang <ztong0001@gmail.com>

[ Upstream commit db332356222d9429731ab9395c89cca403828460 ]

ipwireless_send_packet() can only return 0 on success and -ENOMEM on
error, the caller should check non zero for error condition

Signed-off-by: Tong Zhang <ztong0001@gmail.com>
Acked-by: David Sterba <dsterba@suse.com>
Link: https://lore.kernel.org/r/20200821161942.36589-1-ztong0001@gmail.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>
---
drivers/tty/ipwireless/network.c | 4 ++--
drivers/tty/ipwireless/tty.c | 2 +-
2 files changed, 3 insertions(+), 3 deletions(-)

diff --git a/drivers/tty/ipwireless/network.c b/drivers/tty/ipwireless/network.c
index cf20616340a1a..fe569f6294a24 100644
--- a/drivers/tty/ipwireless/network.c
+++ b/drivers/tty/ipwireless/network.c
@@ -117,7 +117,7 @@ static int ipwireless_ppp_start_xmit(struct ppp_channel *ppp_channel,
skb->len,
notify_packet_sent,
network);
- if (ret == -1) {
+ if (ret < 0) {
skb_pull(skb, 2);
return 0;
}
@@ -134,7 +134,7 @@ static int ipwireless_ppp_start_xmit(struct ppp_channel *ppp_channel,
notify_packet_sent,
network);
kfree(buf);
- if (ret == -1)
+ if (ret < 0)
return 0;
}
kfree_skb(skb);
diff --git a/drivers/tty/ipwireless/tty.c b/drivers/tty/ipwireless/tty.c
index 1ef751c27ac6d..cb04971843306 100644
--- a/drivers/tty/ipwireless/tty.c
+++ b/drivers/tty/ipwireless/tty.c
@@ -218,7 +218,7 @@ static int ipw_write(struct tty_struct *linux_tty,
ret = ipwireless_send_packet(tty->hardware, IPW_CHANNEL_RAS,
buf, count,
ipw_write_packet_sent_callback, tty);
- if (ret == -1) {
+ if (ret < 0) {
mutex_unlock(&tty->ipw_tty_mutex);
return 0;
}
--
2.25.1
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