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| author | Jiri Slaby (SUSE) <jirislaby@kernel.org> | 2023-08-10 11:14:47 +0200 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2023-08-11 21:12:45 +0200 |
| commit | 94b580e308c67922514af146a8793292d60a9b18 (patch) | |
| tree | b3c69be9a0cc412c9985611e2a16dffc4cbd753b | |
| parent | 8d9526f99fc39ebaca173eda646818023e7f0730 (diff) | |
| download | linux-stable-94b580e308c67922514af146a8793292d60a9b18.tar.gz linux-stable-94b580e308c67922514af146a8793292d60a9b18.tar.bz2 linux-stable-94b580e308c67922514af146a8793292d60a9b18.zip | |
tty: can327: unify error paths in can327_ldisc_rx()
Create a label with can327_uart_side_failure() and spin unlock. And jump
there from all three fail paths.
Signed-off-by: "Jiri Slaby (SUSE)" <jirislaby@kernel.org>
Cc: Max Staudt <max@enpas.org>
Cc: Wolfgang Grandegger <wg@grandegger.com>
Cc: Marc Kleine-Budde <mkl@pengutronix.de>
Cc: "David S. Miller" <davem@davemloft.net>
Cc: Eric Dumazet <edumazet@google.com>
Cc: Jakub Kicinski <kuba@kernel.org>
Cc: Paolo Abeni <pabeni@redhat.com>
Cc: linux-can@vger.kernel.org
Link: https://lore.kernel.org/r/20230810091510.13006-14-jirislaby@kernel.org
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
| -rw-r--r-- | drivers/net/can/can327.c | 22 |
1 files changed, 8 insertions, 14 deletions
diff --git a/drivers/net/can/can327.c b/drivers/net/can/can327.c index ee8a977acc8d..05e9c035e8f6 100644 --- a/drivers/net/can/can327.c +++ b/drivers/net/can/can327.c @@ -905,11 +905,7 @@ static void can327_ldisc_rx(struct tty_struct *tty, const unsigned char *cp, if (fp && *fp++) { netdev_err(elm->dev, "Error in received character stream. Check your wiring."); - - can327_uart_side_failure(elm); - - spin_unlock_bh(&elm->lock); - return; + goto uart_failure; } /* Ignore NUL characters, which the PIC microcontroller may @@ -925,10 +921,7 @@ static void can327_ldisc_rx(struct tty_struct *tty, const unsigned char *cp, netdev_err(elm->dev, "Received illegal character %02x.\n", *cp); - can327_uart_side_failure(elm); - - spin_unlock_bh(&elm->lock); - return; + goto uart_failure; } elm->rxbuf[elm->rxfill++] = *cp; @@ -941,15 +934,16 @@ static void can327_ldisc_rx(struct tty_struct *tty, const unsigned char *cp, netdev_err(elm->dev, "Receive buffer overflowed. Bad chip or wiring? count = %i", count); - - can327_uart_side_failure(elm); - - spin_unlock_bh(&elm->lock); - return; + goto uart_failure; } can327_parse_rxbuf(elm, first_new_char_idx); spin_unlock_bh(&elm->lock); + + return; +uart_failure: + can327_uart_side_failure(elm); + spin_unlock_bh(&elm->lock); } /* Write out remaining transmit buffer. |