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TTY/serial fixes for 3.9-rc4

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Here are some tty/serial driver fixes for 3.9.
 
 The big thing here is the fix for the huge mess we caused renaming the 8250
 driver accidentally in the 3.7 kernel release, without realizing that there
 were users of the module options that suddenly broke.  This is now resolved,
 and, to top the injury off, we have a backwards-compatible option for those
 users who got used to the new name since 3.7.  Ugh, sorry about that.
 
 Other than that, some other minor fixes for issues that have been reported by
 users.
 
 Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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Merge tag 'tty-3.9-rc4' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/tty

Pull TTY/serial fixes from Greg Kroah-Hartman:
 "Here are some tty/serial driver fixes for 3.9.

  The big thing here is the fix for the huge mess we caused renaming the
  8250 driver accidentally in the 3.7 kernel release, without realizing
  that there were users of the module options that suddenly broke.  This
  is now resolved, and, to top the injury off, we have a backwards-
  compatible option for those users who got used to the new name since
  3.7.  Ugh, sorry about that.

  Other than that, some other minor fixes for issues that have been
  reported by users."

* tag 'tty-3.9-rc4' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/tty:
  Xilinx: ARM: UART: clear pending irqs before enabling irqs
  TTY: 8250, deprecated 8250_core.* options
  TTY: 8250, revert module name change
  serial: 8250_pci: Add WCH CH352 quirk to avoid Xscale detection
  tty: atmel_serial_probe(): index of atmel_ports[] fix
This commit is contained in:
Linus Torvalds 2013-03-28 15:53:33 -07:00
commit 045ecc26a0
6 changed files with 45 additions and 12 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

6
drivers/tty/serial/8250/8250.c → drivers/tty/serial/8250/8250_core.c
View File

@ -3418,6 +3418,7 @@ MODULE_PARM_DESC(probe_rsa, "Probe I/O ports for RSA");
#endif
MODULE_ALIAS_CHARDEV_MAJOR(TTY_MAJOR);
#ifdef CONFIG_SERIAL_8250_DEPRECATED_OPTIONS
#ifndef MODULE
/* This module was renamed to 8250_core in 3.7. Keep the old "8250" name
* working as well for the module options so we don't break people. We
@ -3432,7 +3433,7 @@ MODULE_ALIAS_CHARDEV_MAJOR(TTY_MAJOR);
static void __used s8250_options(void)
{
#undef MODULE_PARAM_PREFIX
#define MODULE_PARAM_PREFIX "8250."
#define MODULE_PARAM_PREFIX "8250_core."
module_param_cb(share_irqs, &param_ops_uint, &share_irqs, 0644);
module_param_cb(nr_uarts, &param_ops_uint, &nr_uarts, 0644);
@ -3444,5 +3445,6 @@ static void __used s8250_options(void)
#endif
}
#else
MODULE_ALIAS("8250");
MODULE_ALIAS("8250_core");
#endif
#endif

13
drivers/tty/serial/8250/8250_pci.c
View File

@ -1554,6 +1554,7 @@ pci_wch_ch353_setup(struct serial_private *priv,
#define PCI_DEVICE_ID_PLX_CRONYX_OMEGA 0xc001
#define PCI_DEVICE_ID_INTEL_PATSBURG_KT 0x1d3d
#define PCI_VENDOR_ID_WCH 0x4348
#define PCI_DEVICE_ID_WCH_CH352_2S 0x3253
#define PCI_DEVICE_ID_WCH_CH353_4S 0x3453
#define PCI_DEVICE_ID_WCH_CH353_2S1PF 0x5046
#define PCI_DEVICE_ID_WCH_CH353_2S1P 0x7053
@ -2172,6 +2173,14 @@ static struct pci_serial_quirk pci_serial_quirks[] __refdata = {
.subdevice = PCI_ANY_ID,
.setup = pci_wch_ch353_setup,
},
/* WCH CH352 2S card (16550 clone) */
{
.vendor = PCI_VENDOR_ID_WCH,
.device = PCI_DEVICE_ID_WCH_CH352_2S,
.subvendor = PCI_ANY_ID,
.subdevice = PCI_ANY_ID,
.setup = pci_wch_ch353_setup,
},
/*
* ASIX devices with FIFO bug
*/
@ -4870,6 +4879,10 @@ static struct pci_device_id serial_pci_tbl[] = {
PCI_ANY_ID, PCI_ANY_ID,
0, 0, pbn_b0_bt_2_115200 },
{ PCI_VENDOR_ID_WCH, PCI_DEVICE_ID_WCH_CH352_2S,
PCI_ANY_ID, PCI_ANY_ID,
0, 0, pbn_b0_bt_2_115200 },
/*
* Commtech, Inc. Fastcom adapters
*/

17
drivers/tty/serial/8250/Kconfig
View File

@ -33,6 +33,23 @@ config SERIAL_8250
Most people will say Y or M here, so that they can use serial mice,
modems and similar devices connecting to the standard serial ports.
config SERIAL_8250_DEPRECATED_OPTIONS
bool "Support 8250_core.* kernel options (DEPRECATED)"
depends on SERIAL_8250
default y
---help---
In 3.7 we renamed 8250 to 8250_core by mistake, so now we have to
accept kernel parameters in both forms like 8250_core.nr_uarts=4 and
8250.nr_uarts=4. We now renamed the module back to 8250, but if
anybody noticed in 3.7 and changed their userspace we still have to
keep the 8350_core.* options around until they revert the changes
they already did.
If 8250 is built as a module, this adds 8250_core alias instead.
If you did not notice yet and/or you have userspace from pre-3.7, it
is safe (and recommended) to say N here.
config SERIAL_8250_PNP
bool "8250/16550 PNP device support" if EXPERT
depends on SERIAL_8250 && PNP

8
drivers/tty/serial/8250/Makefile
View File

@ -2,10 +2,10 @@
# Makefile for the 8250 serial device drivers.
#
obj-$(CONFIG_SERIAL_8250) += 8250_core.o
8250_core-y := 8250.o
8250_core-$(CONFIG_SERIAL_8250_PNP) += 8250_pnp.o
8250_core-$(CONFIG_SERIAL_8250_DMA) += 8250_dma.o
obj-$(CONFIG_SERIAL_8250) += 8250.o
8250-y := 8250_core.o
8250-$(CONFIG_SERIAL_8250_PNP) += 8250_pnp.o
8250-$(CONFIG_SERIAL_8250_DMA) += 8250_dma.o
obj-$(CONFIG_SERIAL_8250_GSC) += 8250_gsc.o
obj-$(CONFIG_SERIAL_8250_PCI) += 8250_pci.o
obj-$(CONFIG_SERIAL_8250_HP300) += 8250_hp300.o

11
drivers/tty/serial/atmel_serial.c
View File

@ -158,7 +158,7 @@ struct atmel_uart_port {
};
static struct atmel_uart_port atmel_ports[ATMEL_MAX_UART];
static unsigned long atmel_ports_in_use;
static DECLARE_BITMAP(atmel_ports_in_use, ATMEL_MAX_UART);
#ifdef SUPPORT_SYSRQ
static struct console atmel_console;
@ -1769,15 +1769,14 @@ static int atmel_serial_probe(struct platform_device *pdev)
if (ret < 0)
/* port id not found in platform data nor device-tree aliases:
* auto-enumerate it */
ret = find_first_zero_bit(&atmel_ports_in_use,
sizeof(atmel_ports_in_use));
ret = find_first_zero_bit(atmel_ports_in_use, ATMEL_MAX_UART);
if (ret > ATMEL_MAX_UART) {
if (ret >= ATMEL_MAX_UART) {
ret = -ENODEV;
goto err;
}
if (test_and_set_bit(ret, &atmel_ports_in_use)) {
if (test_and_set_bit(ret, atmel_ports_in_use)) {
/* port already in use */
ret = -EBUSY;
goto err;
@ -1857,7 +1856,7 @@ static int atmel_serial_remove(struct platform_device *pdev)
/* "port" is allocated statically, so we shouldn't free it */
clear_bit(port->line, &atmel_ports_in_use);
clear_bit(port->line, atmel_ports_in_use);
clk_put(atmel_port->clk);

2
drivers/tty/serial/xilinx_uartps.c
View File

@ -578,6 +578,8 @@ static int xuartps_startup(struct uart_port *port)
/* Receive Timeout register is enabled with value of 10 */
xuartps_writel(10, XUARTPS_RXTOUT_OFFSET);
/* Clear out any pending interrupts before enabling them */
xuartps_writel(xuartps_readl(XUARTPS_ISR_OFFSET), XUARTPS_ISR_OFFSET);
/* Set the Interrupt Registers with desired interrupts */
xuartps_writel(XUARTPS_IXR_TXEMPTY | XUARTPS_IXR_PARITY |