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tty: n_gsm: Don't ignore write return value in gsmld_output() 

We currently have gsmld_output() ignore the return value from device
write. This means we will lose packets if device write returns 0 or
an error.

Signed-off-by: Tony Lindgren <tony@atomide.com>
Link: https://lore.kernel.org/r/20210930060624.46523-1-tony@atomide.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Tony Lindgren 2021-09-30 09:06:24 +03:00 committed by Greg Kroah-Hartman
parent 46292622ad
commit 9136c68346
1 changed files with 2 additions and 3 deletions
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5
drivers/tty/n_gsm.c
View File

@ -695,7 +695,7 @@ static void gsm_data_kick(struct gsm_mux *gsm, struct gsm_dlci *dlci)
print_hex_dump_bytes("gsm_data_kick: ",
DUMP_PREFIX_OFFSET,
gsm->txframe, len);
if (gsmld_output(gsm, gsm->txframe, len) < 0)
if (gsmld_output(gsm, gsm->txframe, len) <= 0)
break;
/* FIXME: Can eliminate one SOF in many more cases */
gsm->tx_bytes -= msg->len;
@ -2415,8 +2415,7 @@ static int gsmld_output(struct gsm_mux *gsm, u8 *data, int len)
if (debug & 4)
print_hex_dump_bytes("gsmld_output: ", DUMP_PREFIX_OFFSET,
data, len);
gsm->tty->ops->write(gsm->tty, data, len);
return len;
return gsm->tty->ops->write(gsm->tty, data, len);
}
/**