summaryrefslogtreecommitdiffstats
path: root/debian/patches-rt/0006-serial-8250-Use-port-lock-wrappers.patch
diff options
context:
space:
mode:
Diffstat (limited to '')
-rw-r--r--debian/patches-rt/0006-serial-8250-Use-port-lock-wrappers.patch465
1 files changed, 0 insertions, 465 deletions
diff --git a/debian/patches-rt/0006-serial-8250-Use-port-lock-wrappers.patch b/debian/patches-rt/0006-serial-8250-Use-port-lock-wrappers.patch
deleted file mode 100644
index d6ee818bf9..0000000000
--- a/debian/patches-rt/0006-serial-8250-Use-port-lock-wrappers.patch
+++ /dev/null
@@ -1,465 +0,0 @@
-From: Thomas Gleixner <tglx@linutronix.de>
-Date: Thu, 14 Sep 2023 20:43:23 +0206
-Subject: [PATCH 006/134] serial: 8250: Use port lock wrappers
-MIME-Version: 1.0
-Content-Type: text/plain; charset=UTF-8
-Content-Transfer-Encoding: 8bit
-Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/6.6/older/patches-6.6.7-rt18.tar.xz
-
-When a serial port is used for kernel console output, then all
-modifications to the UART registers which are done from other contexts,
-e.g. getty, termios, are interference points for the kernel console.
-
-So far this has been ignored and the printk output is based on the
-principle of hope. The rework of the console infrastructure which aims to
-support threaded and atomic consoles, requires to mark sections which
-modify the UART registers as unsafe. This allows the atomic write function
-to make informed decisions and eventually to restore operational state. It
-also allows to prevent the regular UART code from modifying UART registers
-while printk output is in progress.
-
-All modifications of UART registers are guarded by the UART port lock,
-which provides an obvious synchronization point with the console
-infrastructure.
-
-To avoid adding this functionality to all UART drivers, wrap the
-spin_[un]lock*() invocations for uart_port::lock into helper functions
-which just contain the spin_[un]lock*() invocations for now. In a
-subsequent step these helpers will gain the console synchronization
-mechanisms.
-
-Converted with coccinelle. No functional change.
-
-Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
-Reviewed-by: Ilpo Järvinen <ilpo.jarvinen@linux.intel.com>
-Signed-off-by: John Ogness <john.ogness@linutronix.de>
-Link: https://lore.kernel.org/r/20230914183831.587273-7-john.ogness@linutronix.de
-Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
-Signed-off-by: Sebastian Andrzej Siewior <bigeasy@linutronix.de>
----
- drivers/tty/serial/8250/8250_core.c | 12 ++--
- drivers/tty/serial/8250/8250_port.c | 100 ++++++++++++++++++------------------
- 2 files changed, 56 insertions(+), 56 deletions(-)
-
---- a/drivers/tty/serial/8250/8250_core.c
-+++ b/drivers/tty/serial/8250/8250_core.c
-@@ -259,7 +259,7 @@ static void serial8250_backup_timeout(st
- unsigned int iir, ier = 0, lsr;
- unsigned long flags;
-
-- spin_lock_irqsave(&up->port.lock, flags);
-+ uart_port_lock_irqsave(&up->port, &flags);
-
- /*
- * Must disable interrupts or else we risk racing with the interrupt
-@@ -292,7 +292,7 @@ static void serial8250_backup_timeout(st
- if (up->port.irq)
- serial_out(up, UART_IER, ier);
-
-- spin_unlock_irqrestore(&up->port.lock, flags);
-+ uart_port_unlock_irqrestore(&up->port, flags);
-
- /* Standard timer interval plus 0.2s to keep the port running */
- mod_timer(&up->timer,
-@@ -992,11 +992,11 @@ static void serial_8250_overrun_backoff_
- struct uart_port *port = &up->port;
- unsigned long flags;
-
-- spin_lock_irqsave(&port->lock, flags);
-+ uart_port_lock_irqsave(port, &flags);
- up->ier |= UART_IER_RLSI | UART_IER_RDI;
- up->port.read_status_mask |= UART_LSR_DR;
- serial_out(up, UART_IER, up->ier);
-- spin_unlock_irqrestore(&port->lock, flags);
-+ uart_port_unlock_irqrestore(port, flags);
- }
-
- /**
-@@ -1194,9 +1194,9 @@ void serial8250_unregister_port(int line
- if (uart->em485) {
- unsigned long flags;
-
-- spin_lock_irqsave(&uart->port.lock, flags);
-+ uart_port_lock_irqsave(&uart->port, &flags);
- serial8250_em485_destroy(uart);
-- spin_unlock_irqrestore(&uart->port.lock, flags);
-+ uart_port_unlock_irqrestore(&uart->port, flags);
- }
-
- uart_remove_one_port(&serial8250_reg, &uart->port);
---- a/drivers/tty/serial/8250/8250_port.c
-+++ b/drivers/tty/serial/8250/8250_port.c
-@@ -689,7 +689,7 @@ static void serial8250_set_sleep(struct
-
- if (p->capabilities & UART_CAP_SLEEP) {
- /* Synchronize UART_IER access against the console. */
-- spin_lock_irq(&p->port.lock);
-+ uart_port_lock_irq(&p->port);
- if (p->capabilities & UART_CAP_EFR) {
- lcr = serial_in(p, UART_LCR);
- efr = serial_in(p, UART_EFR);
-@@ -703,7 +703,7 @@ static void serial8250_set_sleep(struct
- serial_out(p, UART_EFR, efr);
- serial_out(p, UART_LCR, lcr);
- }
-- spin_unlock_irq(&p->port.lock);
-+ uart_port_unlock_irq(&p->port);
- }
-
- serial8250_rpm_put(p);
-@@ -746,9 +746,9 @@ static void enable_rsa(struct uart_8250_
- {
- if (up->port.type == PORT_RSA) {
- if (up->port.uartclk != SERIAL_RSA_BAUD_BASE * 16) {
-- spin_lock_irq(&up->port.lock);
-+ uart_port_lock_irq(&up->port);
- __enable_rsa(up);
-- spin_unlock_irq(&up->port.lock);
-+ uart_port_unlock_irq(&up->port);
- }
- if (up->port.uartclk == SERIAL_RSA_BAUD_BASE * 16)
- serial_out(up, UART_RSA_FRR, 0);
-@@ -768,7 +768,7 @@ static void disable_rsa(struct uart_8250
-
- if (up->port.type == PORT_RSA &&
- up->port.uartclk == SERIAL_RSA_BAUD_BASE * 16) {
-- spin_lock_irq(&up->port.lock);
-+ uart_port_lock_irq(&up->port);
-
- mode = serial_in(up, UART_RSA_MSR);
- result = !(mode & UART_RSA_MSR_FIFO);
-@@ -781,7 +781,7 @@ static void disable_rsa(struct uart_8250
-
- if (result)
- up->port.uartclk = SERIAL_RSA_BAUD_BASE_LO * 16;
-- spin_unlock_irq(&up->port.lock);
-+ uart_port_unlock_irq(&up->port);
- }
- }
- #endif /* CONFIG_SERIAL_8250_RSA */
-@@ -1172,7 +1172,7 @@ static void autoconfig(struct uart_8250_
- *
- * Synchronize UART_IER access against the console.
- */
-- spin_lock_irqsave(&port->lock, flags);
-+ uart_port_lock_irqsave(port, &flags);
-
- up->capabilities = 0;
- up->bugs = 0;
-@@ -1211,7 +1211,7 @@ static void autoconfig(struct uart_8250_
- /*
- * We failed; there's nothing here
- */
-- spin_unlock_irqrestore(&port->lock, flags);
-+ uart_port_unlock_irqrestore(port, flags);
- DEBUG_AUTOCONF("IER test failed (%02x, %02x) ",
- scratch2, scratch3);
- goto out;
-@@ -1235,7 +1235,7 @@ static void autoconfig(struct uart_8250_
- status1 = serial_in(up, UART_MSR) & UART_MSR_STATUS_BITS;
- serial8250_out_MCR(up, save_mcr);
- if (status1 != (UART_MSR_DCD | UART_MSR_CTS)) {
-- spin_unlock_irqrestore(&port->lock, flags);
-+ uart_port_unlock_irqrestore(port, flags);
- DEBUG_AUTOCONF("LOOP test failed (%02x) ",
- status1);
- goto out;
-@@ -1304,7 +1304,7 @@ static void autoconfig(struct uart_8250_
- serial8250_clear_IER(up);
-
- out_unlock:
-- spin_unlock_irqrestore(&port->lock, flags);
-+ uart_port_unlock_irqrestore(port, flags);
-
- /*
- * Check if the device is a Fintek F81216A
-@@ -1344,9 +1344,9 @@ static void autoconfig_irq(struct uart_8
- probe_irq_off(probe_irq_on());
- save_mcr = serial8250_in_MCR(up);
- /* Synchronize UART_IER access against the console. */
-- spin_lock_irq(&port->lock);
-+ uart_port_lock_irq(port);
- save_ier = serial_in(up, UART_IER);
-- spin_unlock_irq(&port->lock);
-+ uart_port_unlock_irq(port);
- serial8250_out_MCR(up, UART_MCR_OUT1 | UART_MCR_OUT2);
-
- irqs = probe_irq_on();
-@@ -1359,9 +1359,9 @@ static void autoconfig_irq(struct uart_8
- UART_MCR_DTR | UART_MCR_RTS | UART_MCR_OUT2);
- }
- /* Synchronize UART_IER access against the console. */
-- spin_lock_irq(&port->lock);
-+ uart_port_lock_irq(port);
- serial_out(up, UART_IER, UART_IER_ALL_INTR);
-- spin_unlock_irq(&port->lock);
-+ uart_port_unlock_irq(port);
- serial_in(up, UART_LSR);
- serial_in(up, UART_RX);
- serial_in(up, UART_IIR);
-@@ -1372,9 +1372,9 @@ static void autoconfig_irq(struct uart_8
-
- serial8250_out_MCR(up, save_mcr);
- /* Synchronize UART_IER access against the console. */
-- spin_lock_irq(&port->lock);
-+ uart_port_lock_irq(port);
- serial_out(up, UART_IER, save_ier);
-- spin_unlock_irq(&port->lock);
-+ uart_port_unlock_irq(port);
-
- if (port->flags & UPF_FOURPORT)
- outb_p(save_ICP, ICP);
-@@ -1442,13 +1442,13 @@ static enum hrtimer_restart serial8250_e
- unsigned long flags;
-
- serial8250_rpm_get(p);
-- spin_lock_irqsave(&p->port.lock, flags);
-+ uart_port_lock_irqsave(&p->port, &flags);
- if (em485->active_timer == &em485->stop_tx_timer) {
- p->rs485_stop_tx(p);
- em485->active_timer = NULL;
- em485->tx_stopped = true;
- }
-- spin_unlock_irqrestore(&p->port.lock, flags);
-+ uart_port_unlock_irqrestore(&p->port, flags);
- serial8250_rpm_put(p);
-
- return HRTIMER_NORESTART;
-@@ -1630,12 +1630,12 @@ static enum hrtimer_restart serial8250_e
- struct uart_8250_port *p = em485->port;
- unsigned long flags;
-
-- spin_lock_irqsave(&p->port.lock, flags);
-+ uart_port_lock_irqsave(&p->port, &flags);
- if (em485->active_timer == &em485->start_tx_timer) {
- __start_tx(&p->port);
- em485->active_timer = NULL;
- }
-- spin_unlock_irqrestore(&p->port.lock, flags);
-+ uart_port_unlock_irqrestore(&p->port, flags);
-
- return HRTIMER_NORESTART;
- }
-@@ -1918,7 +1918,7 @@ int serial8250_handle_irq(struct uart_po
- if (iir & UART_IIR_NO_INT)
- return 0;
-
-- spin_lock_irqsave(&port->lock, flags);
-+ uart_port_lock_irqsave(port, &flags);
-
- status = serial_lsr_in(up);
-
-@@ -1988,9 +1988,9 @@ static int serial8250_tx_threshold_handl
- if ((iir & UART_IIR_ID) == UART_IIR_THRI) {
- struct uart_8250_port *up = up_to_u8250p(port);
-
-- spin_lock_irqsave(&port->lock, flags);
-+ uart_port_lock_irqsave(port, &flags);
- serial8250_tx_chars(up);
-- spin_unlock_irqrestore(&port->lock, flags);
-+ uart_port_unlock_irqrestore(port, flags);
- }
-
- iir = serial_port_in(port, UART_IIR);
-@@ -2005,10 +2005,10 @@ static unsigned int serial8250_tx_empty(
-
- serial8250_rpm_get(up);
-
-- spin_lock_irqsave(&port->lock, flags);
-+ uart_port_lock_irqsave(port, &flags);
- if (!serial8250_tx_dma_running(up) && uart_lsr_tx_empty(serial_lsr_in(up)))
- result = TIOCSER_TEMT;
-- spin_unlock_irqrestore(&port->lock, flags);
-+ uart_port_unlock_irqrestore(port, flags);
-
- serial8250_rpm_put(up);
-
-@@ -2070,13 +2070,13 @@ static void serial8250_break_ctl(struct
- unsigned long flags;
-
- serial8250_rpm_get(up);
-- spin_lock_irqsave(&port->lock, flags);
-+ uart_port_lock_irqsave(port, &flags);
- if (break_state == -1)
- up->lcr |= UART_LCR_SBC;
- else
- up->lcr &= ~UART_LCR_SBC;
- serial_port_out(port, UART_LCR, up->lcr);
-- spin_unlock_irqrestore(&port->lock, flags);
-+ uart_port_unlock_irqrestore(port, flags);
- serial8250_rpm_put(up);
- }
-
-@@ -2211,7 +2211,7 @@ int serial8250_do_startup(struct uart_po
- *
- * Synchronize UART_IER access against the console.
- */
-- spin_lock_irqsave(&port->lock, flags);
-+ uart_port_lock_irqsave(port, &flags);
- up->acr = 0;
- serial_port_out(port, UART_LCR, UART_LCR_CONF_MODE_B);
- serial_port_out(port, UART_EFR, UART_EFR_ECB);
-@@ -2221,7 +2221,7 @@ int serial8250_do_startup(struct uart_po
- serial_port_out(port, UART_LCR, UART_LCR_CONF_MODE_B);
- serial_port_out(port, UART_EFR, UART_EFR_ECB);
- serial_port_out(port, UART_LCR, 0);
-- spin_unlock_irqrestore(&port->lock, flags);
-+ uart_port_unlock_irqrestore(port, flags);
- }
-
- if (port->type == PORT_DA830) {
-@@ -2230,10 +2230,10 @@ int serial8250_do_startup(struct uart_po
- *
- * Synchronize UART_IER access against the console.
- */
-- spin_lock_irqsave(&port->lock, flags);
-+ uart_port_lock_irqsave(port, &flags);
- serial_port_out(port, UART_IER, 0);
- serial_port_out(port, UART_DA830_PWREMU_MGMT, 0);
-- spin_unlock_irqrestore(&port->lock, flags);
-+ uart_port_unlock_irqrestore(port, flags);
- mdelay(10);
-
- /* Enable Tx, Rx and free run mode */
-@@ -2347,7 +2347,7 @@ int serial8250_do_startup(struct uart_po
- *
- * Synchronize UART_IER access against the console.
- */
-- spin_lock_irqsave(&port->lock, flags);
-+ uart_port_lock_irqsave(port, &flags);
-
- wait_for_xmitr(up, UART_LSR_THRE);
- serial_port_out_sync(port, UART_IER, UART_IER_THRI);
-@@ -2359,7 +2359,7 @@ int serial8250_do_startup(struct uart_po
- iir = serial_port_in(port, UART_IIR);
- serial_port_out(port, UART_IER, 0);
-
-- spin_unlock_irqrestore(&port->lock, flags);
-+ uart_port_unlock_irqrestore(port, flags);
-
- if (port->irqflags & IRQF_SHARED)
- enable_irq(port->irq);
-@@ -2382,7 +2382,7 @@ int serial8250_do_startup(struct uart_po
- */
- serial_port_out(port, UART_LCR, UART_LCR_WLEN8);
-
-- spin_lock_irqsave(&port->lock, flags);
-+ uart_port_lock_irqsave(port, &flags);
- if (up->port.flags & UPF_FOURPORT) {
- if (!up->port.irq)
- up->port.mctrl |= TIOCM_OUT1;
-@@ -2428,7 +2428,7 @@ int serial8250_do_startup(struct uart_po
- }
-
- dont_test_tx_en:
-- spin_unlock_irqrestore(&port->lock, flags);
-+ uart_port_unlock_irqrestore(port, flags);
-
- /*
- * Clear the interrupt registers again for luck, and clear the
-@@ -2499,17 +2499,17 @@ void serial8250_do_shutdown(struct uart_
- *
- * Synchronize UART_IER access against the console.
- */
-- spin_lock_irqsave(&port->lock, flags);
-+ uart_port_lock_irqsave(port, &flags);
- up->ier = 0;
- serial_port_out(port, UART_IER, 0);
-- spin_unlock_irqrestore(&port->lock, flags);
-+ uart_port_unlock_irqrestore(port, flags);
-
- synchronize_irq(port->irq);
-
- if (up->dma)
- serial8250_release_dma(up);
-
-- spin_lock_irqsave(&port->lock, flags);
-+ uart_port_lock_irqsave(port, &flags);
- if (port->flags & UPF_FOURPORT) {
- /* reset interrupts on the AST Fourport board */
- inb((port->iobase & 0xfe0) | 0x1f);
-@@ -2518,7 +2518,7 @@ void serial8250_do_shutdown(struct uart_
- port->mctrl &= ~TIOCM_OUT2;
-
- serial8250_set_mctrl(port, port->mctrl);
-- spin_unlock_irqrestore(&port->lock, flags);
-+ uart_port_unlock_irqrestore(port, flags);
-
- /*
- * Disable break condition and FIFOs
-@@ -2754,14 +2754,14 @@ void serial8250_update_uartclk(struct ua
- quot = serial8250_get_divisor(port, baud, &frac);
-
- serial8250_rpm_get(up);
-- spin_lock_irqsave(&port->lock, flags);
-+ uart_port_lock_irqsave(port, &flags);
-
- uart_update_timeout(port, termios->c_cflag, baud);
-
- serial8250_set_divisor(port, baud, quot, frac);
- serial_port_out(port, UART_LCR, up->lcr);
-
-- spin_unlock_irqrestore(&port->lock, flags);
-+ uart_port_unlock_irqrestore(port, flags);
- serial8250_rpm_put(up);
-
- out_unlock:
-@@ -2798,7 +2798,7 @@ serial8250_do_set_termios(struct uart_po
- * Synchronize UART_IER access against the console.
- */
- serial8250_rpm_get(up);
-- spin_lock_irqsave(&port->lock, flags);
-+ uart_port_lock_irqsave(port, &flags);
-
- up->lcr = cval; /* Save computed LCR */
-
-@@ -2901,7 +2901,7 @@ serial8250_do_set_termios(struct uart_po
- serial_port_out(port, UART_FCR, up->fcr); /* set fcr */
- }
- serial8250_set_mctrl(port, port->mctrl);
-- spin_unlock_irqrestore(&port->lock, flags);
-+ uart_port_unlock_irqrestore(port, flags);
- serial8250_rpm_put(up);
-
- /* Don't rewrite B0 */
-@@ -2924,15 +2924,15 @@ void serial8250_do_set_ldisc(struct uart
- {
- if (termios->c_line == N_PPS) {
- port->flags |= UPF_HARDPPS_CD;
-- spin_lock_irq(&port->lock);
-+ uart_port_lock_irq(port);
- serial8250_enable_ms(port);
-- spin_unlock_irq(&port->lock);
-+ uart_port_unlock_irq(port);
- } else {
- port->flags &= ~UPF_HARDPPS_CD;
- if (!UART_ENABLE_MS(port, termios->c_cflag)) {
-- spin_lock_irq(&port->lock);
-+ uart_port_lock_irq(port);
- serial8250_disable_ms(port);
-- spin_unlock_irq(&port->lock);
-+ uart_port_unlock_irq(port);
- }
- }
- }
-@@ -3406,9 +3406,9 @@ void serial8250_console_write(struct uar
- touch_nmi_watchdog();
-
- if (oops_in_progress)
-- locked = spin_trylock_irqsave(&port->lock, flags);
-+ locked = uart_port_trylock_irqsave(port, &flags);
- else
-- spin_lock_irqsave(&port->lock, flags);
-+ uart_port_lock_irqsave(port, &flags);
-
- /*
- * First save the IER then disable the interrupts
-@@ -3478,7 +3478,7 @@ void serial8250_console_write(struct uar
- serial8250_modem_status(up);
-
- if (locked)
-- spin_unlock_irqrestore(&port->lock, flags);
-+ uart_port_unlock_irqrestore(port, flags);
- }
-
- static unsigned int probe_baud(struct uart_port *port)
generated by cgit v1.2.3 (git 2.39.1) at 2024-11-12 06:49:56 +0000