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| author | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2018-09-30 08:11:09 -0700 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2018-09-30 08:11:09 -0700 |
| commit | 669c5d8d5f2be781d411ad8d52274038c795f257 (patch) | |
| tree | 86cc56ec1cb077b49e58f88c1427991e2b8fbcbc /drivers/tty/serial/cpm_uart | |
| parent | c1a02c216044784f9871a5066fd22de7d0414d0d (diff) | |
| parent | 17b57b1883c1285f3d0dc2266e8f79286a7bef38 (diff) | |
| download | linux-669c5d8d5f2be781d411ad8d52274038c795f257.tar.bz2 | |
Merge 4.19-rc6 into tty-next
We want the tty/serial fixes in here as well.
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'drivers/tty/serial/cpm_uart')
| -rw-r--r-- | drivers/tty/serial/cpm_uart/cpm_uart_core.c | 10 |
1 files changed, 7 insertions, 3 deletions
diff --git a/drivers/tty/serial/cpm_uart/cpm_uart_core.c b/drivers/tty/serial/cpm_uart/cpm_uart_core.c index ea7204d75022..79ad30d34949 100644 --- a/drivers/tty/serial/cpm_uart/cpm_uart_core.c +++ b/drivers/tty/serial/cpm_uart/cpm_uart_core.c @@ -1054,8 +1054,8 @@ static int poll_wait_key(char *obuf, struct uart_cpm_port *pinfo) /* Get the address of the host memory buffer. */ bdp = pinfo->rx_cur; - while (bdp->cbd_sc & BD_SC_EMPTY) - ; + if (bdp->cbd_sc & BD_SC_EMPTY) + return NO_POLL_CHAR; /* If the buffer address is in the CPM DPRAM, don't * convert it. @@ -1090,7 +1090,11 @@ static int cpm_get_poll_char(struct uart_port *port) poll_chars = 0; } if (poll_chars <= 0) { - poll_chars = poll_wait_key(poll_buf, pinfo); + int ret = poll_wait_key(poll_buf, pinfo); + + if (ret == NO_POLL_CHAR) + return ret; + poll_chars = ret; pollp = poll_buf; } poll_chars--; |