diff options
author | Linus Torvalds <torvalds@linux-foundation.org> | 2022-05-15 18:05:04 +0300 |
---|---|---|
committer | Linus Torvalds <torvalds@linux-foundation.org> | 2022-05-15 18:05:04 +0300 |
commit | 6811a466d27ba79e6c31c0aecc74feab0472df36 (patch) | |
tree | 9803821e42c6e6d71aff13a0ff9ead4e29674808 | |
parent | fc49583cdb2c8d5dc7dc626b80c8852478cb3383 (diff) | |
parent | 401fb66a355eb0f22096cf26864324f8e63c7d78 (diff) |
Merge tag 'tty-5.18-rc7' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/tty
Pull tty/serial driver fixes from Greg KH:
"Here are some small tty n_gsm and serial driver fixes for 5.18-rc7
that resolve reported problems. They include:
- n_gsm fixes for reported issues
- 8250_mtk driver fixes for some platforms
- fsl_lpuart driver fix for reported problem.
- digicolor driver fix for reported problem.
All have been in linux-next for a while with no reported problems"
* tag 'tty-5.18-rc7' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/tty:
fsl_lpuart: Don't enable interrupts too early
tty: n_gsm: fix invalid gsmtty_write_room() result
tty: n_gsm: fix mux activation issues in gsm_config()
tty: n_gsm: fix buffer over-read in gsm_dlci_data()
serial: 8250_mtk: Fix register address for XON/XOFF character
serial: 8250_mtk: Make sure to select the right FEATURE_SEL
serial: 8250_mtk: Fix UART_EFR register address
tty/serial: digicolor: fix possible null-ptr-deref in digicolor_uart_probe()
-rw-r--r-- | drivers/tty/n_gsm.c | 20 | ||||
-rw-r--r-- | drivers/tty/serial/8250/8250_mtk.c | 29 | ||||
-rw-r--r-- | drivers/tty/serial/digicolor-usart.c | 5 | ||||
-rw-r--r-- | drivers/tty/serial/fsl_lpuart.c | 18 |
4 files changed, 43 insertions, 29 deletions
diff --git a/drivers/tty/n_gsm.c b/drivers/tty/n_gsm.c index a38b922bcbc1..fd8b86dde525 100644 --- a/drivers/tty/n_gsm.c +++ b/drivers/tty/n_gsm.c @@ -137,6 +137,7 @@ struct gsm_dlci { int retries; /* Uplink tty if active */ struct tty_port port; /* The tty bound to this DLCI if there is one */ +#define TX_SIZE 4096 /* Must be power of 2. */ struct kfifo fifo; /* Queue fifo for the DLCI */ int adaption; /* Adaption layer in use */ int prev_adaption; @@ -1658,6 +1659,7 @@ static void gsm_dlci_data(struct gsm_dlci *dlci, const u8 *data, int clen) if (len == 0) return; } + len--; slen++; tty = tty_port_tty_get(port); if (tty) { @@ -1730,7 +1732,7 @@ static struct gsm_dlci *gsm_dlci_alloc(struct gsm_mux *gsm, int addr) return NULL; spin_lock_init(&dlci->lock); mutex_init(&dlci->mutex); - if (kfifo_alloc(&dlci->fifo, 4096, GFP_KERNEL) < 0) { + if (kfifo_alloc(&dlci->fifo, TX_SIZE, GFP_KERNEL) < 0) { kfree(dlci); return NULL; } @@ -2351,6 +2353,7 @@ static void gsm_copy_config_values(struct gsm_mux *gsm, static int gsm_config(struct gsm_mux *gsm, struct gsm_config *c) { + int ret = 0; int need_close = 0; int need_restart = 0; @@ -2418,10 +2421,13 @@ static int gsm_config(struct gsm_mux *gsm, struct gsm_config *c) * FIXME: We need to separate activation/deactivation from adding * and removing from the mux array */ - if (need_restart) - gsm_activate_mux(gsm); - if (gsm->initiator && need_close) - gsm_dlci_begin_open(gsm->dlci[0]); + if (gsm->dead) { + ret = gsm_activate_mux(gsm); + if (ret) + return ret; + if (gsm->initiator) + gsm_dlci_begin_open(gsm->dlci[0]); + } return 0; } @@ -2971,8 +2977,6 @@ static struct tty_ldisc_ops tty_ldisc_packet = { * Virtual tty side */ -#define TX_SIZE 512 - /** * gsm_modem_upd_via_data - send modem bits via convergence layer * @dlci: channel @@ -3212,7 +3216,7 @@ static unsigned int gsmtty_write_room(struct tty_struct *tty) struct gsm_dlci *dlci = tty->driver_data; if (dlci->state == DLCI_CLOSED) return 0; - return TX_SIZE - kfifo_len(&dlci->fifo); + return kfifo_avail(&dlci->fifo); } static unsigned int gsmtty_chars_in_buffer(struct tty_struct *tty) diff --git a/drivers/tty/serial/8250/8250_mtk.c b/drivers/tty/serial/8250/8250_mtk.c index f4a0caa56f84..21053db93ff1 100644 --- a/drivers/tty/serial/8250/8250_mtk.c +++ b/drivers/tty/serial/8250/8250_mtk.c @@ -37,6 +37,7 @@ #define MTK_UART_IER_RTSI 0x40 /* Enable RTS Modem status interrupt */ #define MTK_UART_IER_CTSI 0x80 /* Enable CTS Modem status interrupt */ +#define MTK_UART_EFR 38 /* I/O: Extended Features Register */ #define MTK_UART_EFR_EN 0x10 /* Enable enhancement feature */ #define MTK_UART_EFR_RTS 0x40 /* Enable hardware rx flow control */ #define MTK_UART_EFR_CTS 0x80 /* Enable hardware tx flow control */ @@ -53,6 +54,12 @@ #define MTK_UART_TX_TRIGGER 1 #define MTK_UART_RX_TRIGGER MTK_UART_RX_SIZE +#define MTK_UART_FEATURE_SEL 39 /* Feature Selection register */ +#define MTK_UART_FEAT_NEWRMAP BIT(0) /* Use new register map */ + +#define MTK_UART_XON1 40 /* I/O: Xon character 1 */ +#define MTK_UART_XOFF1 42 /* I/O: Xoff character 1 */ + #ifdef CONFIG_SERIAL_8250_DMA enum dma_rx_status { DMA_RX_START = 0, @@ -169,7 +176,7 @@ static void mtk8250_dma_enable(struct uart_8250_port *up) MTK_UART_DMA_EN_RX | MTK_UART_DMA_EN_TX); serial_out(up, UART_LCR, UART_LCR_CONF_MODE_B); - serial_out(up, UART_EFR, UART_EFR_ECB); + serial_out(up, MTK_UART_EFR, UART_EFR_ECB); serial_out(up, UART_LCR, lcr); if (dmaengine_slave_config(dma->rxchan, &dma->rxconf) != 0) @@ -232,7 +239,7 @@ static void mtk8250_set_flow_ctrl(struct uart_8250_port *up, int mode) int lcr = serial_in(up, UART_LCR); serial_out(up, UART_LCR, UART_LCR_CONF_MODE_B); - serial_out(up, UART_EFR, UART_EFR_ECB); + serial_out(up, MTK_UART_EFR, UART_EFR_ECB); serial_out(up, UART_LCR, lcr); lcr = serial_in(up, UART_LCR); @@ -241,7 +248,7 @@ static void mtk8250_set_flow_ctrl(struct uart_8250_port *up, int mode) serial_out(up, MTK_UART_ESCAPE_DAT, MTK_UART_ESCAPE_CHAR); serial_out(up, MTK_UART_ESCAPE_EN, 0x00); serial_out(up, UART_LCR, UART_LCR_CONF_MODE_B); - serial_out(up, UART_EFR, serial_in(up, UART_EFR) & + serial_out(up, MTK_UART_EFR, serial_in(up, MTK_UART_EFR) & (~(MTK_UART_EFR_HW_FC | MTK_UART_EFR_SW_FC_MASK))); serial_out(up, UART_LCR, lcr); mtk8250_disable_intrs(up, MTK_UART_IER_XOFFI | @@ -255,8 +262,8 @@ static void mtk8250_set_flow_ctrl(struct uart_8250_port *up, int mode) serial_out(up, UART_LCR, UART_LCR_CONF_MODE_B); /*enable hw flow control*/ - serial_out(up, UART_EFR, MTK_UART_EFR_HW_FC | - (serial_in(up, UART_EFR) & + serial_out(up, MTK_UART_EFR, MTK_UART_EFR_HW_FC | + (serial_in(up, MTK_UART_EFR) & (~(MTK_UART_EFR_HW_FC | MTK_UART_EFR_SW_FC_MASK)))); serial_out(up, UART_LCR, lcr); @@ -270,12 +277,12 @@ static void mtk8250_set_flow_ctrl(struct uart_8250_port *up, int mode) serial_out(up, UART_LCR, UART_LCR_CONF_MODE_B); /*enable sw flow control */ - serial_out(up, UART_EFR, MTK_UART_EFR_XON1_XOFF1 | - (serial_in(up, UART_EFR) & + serial_out(up, MTK_UART_EFR, MTK_UART_EFR_XON1_XOFF1 | + (serial_in(up, MTK_UART_EFR) & (~(MTK_UART_EFR_HW_FC | MTK_UART_EFR_SW_FC_MASK)))); - serial_out(up, UART_XON1, START_CHAR(port->state->port.tty)); - serial_out(up, UART_XOFF1, STOP_CHAR(port->state->port.tty)); + serial_out(up, MTK_UART_XON1, START_CHAR(port->state->port.tty)); + serial_out(up, MTK_UART_XOFF1, STOP_CHAR(port->state->port.tty)); serial_out(up, UART_LCR, lcr); mtk8250_disable_intrs(up, MTK_UART_IER_CTSI|MTK_UART_IER_RTSI); mtk8250_enable_intrs(up, MTK_UART_IER_XOFFI); @@ -568,6 +575,10 @@ static int mtk8250_probe(struct platform_device *pdev) uart.dma = data->dma; #endif + /* Set AP UART new register map */ + writel(MTK_UART_FEAT_NEWRMAP, uart.port.membase + + (MTK_UART_FEATURE_SEL << uart.port.regshift)); + /* Disable Rate Fix function */ writel(0x0, uart.port.membase + (MTK_UART_RATE_FIX << uart.port.regshift)); diff --git a/drivers/tty/serial/digicolor-usart.c b/drivers/tty/serial/digicolor-usart.c index 6d70fea76bb3..e37a917b9dbb 100644 --- a/drivers/tty/serial/digicolor-usart.c +++ b/drivers/tty/serial/digicolor-usart.c @@ -471,11 +471,10 @@ static int digicolor_uart_probe(struct platform_device *pdev) if (IS_ERR(uart_clk)) return PTR_ERR(uart_clk); - res = platform_get_resource(pdev, IORESOURCE_MEM, 0); - dp->port.mapbase = res->start; - dp->port.membase = devm_ioremap_resource(&pdev->dev, res); + dp->port.membase = devm_platform_get_and_ioremap_resource(pdev, 0, &res); if (IS_ERR(dp->port.membase)) return PTR_ERR(dp->port.membase); + dp->port.mapbase = res->start; irq = platform_get_irq(pdev, 0); if (irq < 0) diff --git a/drivers/tty/serial/fsl_lpuart.c b/drivers/tty/serial/fsl_lpuart.c index 87789872f400..be12fee94db5 100644 --- a/drivers/tty/serial/fsl_lpuart.c +++ b/drivers/tty/serial/fsl_lpuart.c @@ -2664,6 +2664,7 @@ static int lpuart_probe(struct platform_device *pdev) struct device_node *np = pdev->dev.of_node; struct lpuart_port *sport; struct resource *res; + irq_handler_t handler; int ret; sport = devm_kzalloc(&pdev->dev, sizeof(*sport), GFP_KERNEL); @@ -2741,17 +2742,11 @@ static int lpuart_probe(struct platform_device *pdev) if (lpuart_is_32(sport)) { lpuart_reg.cons = LPUART32_CONSOLE; - ret = devm_request_irq(&pdev->dev, sport->port.irq, lpuart32_int, 0, - DRIVER_NAME, sport); + handler = lpuart32_int; } else { lpuart_reg.cons = LPUART_CONSOLE; - ret = devm_request_irq(&pdev->dev, sport->port.irq, lpuart_int, 0, - DRIVER_NAME, sport); + handler = lpuart_int; } - - if (ret) - goto failed_irq_request; - ret = uart_add_one_port(&lpuart_reg, &sport->port); if (ret) goto failed_attach_port; @@ -2773,13 +2768,18 @@ static int lpuart_probe(struct platform_device *pdev) sport->port.rs485_config(&sport->port, &sport->port.rs485); + ret = devm_request_irq(&pdev->dev, sport->port.irq, handler, 0, + DRIVER_NAME, sport); + if (ret) + goto failed_irq_request; + return 0; +failed_irq_request: failed_get_rs485: failed_reset: uart_remove_one_port(&lpuart_reg, &sport->port); failed_attach_port: -failed_irq_request: lpuart_disable_clks(sport); failed_clock_enable: failed_out_of_range: |