kernel/linux.git/drivers/tty/serial, branch v3.0.6

tty: Add "spi:" prefix for spi modalias

2011-10-03T18:39:49+00:00

commit 8c4074cd2254606aeb788d518ccc27c9f97129e1 upstream. Since commit e0626e38 (spi: prefix modalias with "spi:"), the spi modalias is prefixed with "spi:". This patch adds "spi:" prefix and removes "-spi" suffix in the modalias. Signed-off-by: Axel Lin Signed-off-by: Greg Kroah-Hartman

8250: Fix race condition in serial8250_backup_timeout().

2011-10-03T18:39:48+00:00

commit dbb3b1ca5609d1f3848cd387d06cc60aaacf7f98 upstream. This is to fix an issue where output will suddenly become very slow. The problem occurs on 8250 UARTS with the hardware bug UART_BUG_THRE. BACKGROUND For normal UARTs (without UART_BUG_THRE): When the serial core layer gets new transmit data and the transmitter is idle, it buffers the data and calls the 8250s' serial8250_start_tx() routine which will simply enable the TX interrupt in the IER register and return. This should immediately fire a THRE interrupt and begin transmitting the data. For buggy UARTs (with UART_BUG_THRE): merely enabling the TX interrupt in IER does not necessarily generate a new THRE interrupt. Therefore, a background timer periodically checks to see if there is pending data, and starts transmission if that is the case. The bug happens on SMP systems when the system has nothing to transmit, the transmit interrupt is disabled and the following sequence occurs: - CPU0: The background timer routine serial8250_backup_timeout() starts and saves the state of the interrupt enable register (IER) and then disables all interrupts in IER. NOTE: The transmit interrupt (TI) bit is saved as disabled. - CPU1: The serial core gets data to transmit, grabs the port lock and calls serial8250_start_tx() which enables the TI in IER. - CPU0: serial8250_backup_timeout() waits for the port lock. - CPU1: finishes (with TI enabled) and releases the port lock. - CPU0: serial8250_backup_timeout() calls the interrupt routine which will transmit the next fifo's worth of data and then restores the IER from the previously saved value (TI disabled). At this point, as long as the serial core has more transmit data buffered, it will not call serial8250_start_tx() again and the background timer routine will slowly transmit the data. The fix is to have serial8250_start_tx() get the port lock before it saves the IER state and release it after restoring IER. This will prevent serial8250_start_tx() from running in parallel. Signed-off-by: Al Cooper Signed-off-by: Greg Kroah-Hartman

8250_pci: add support for Rosewill RC-305 4x serial port card

2011-10-03T18:39:48+00:00

commit 44178176ecc55ad370b837dd2c4b4b8bed1e3823 upstream. This patch adds support for the Rosewill RC-305 four-port PCI serial card, and probably any other four-port serial cards based on the Moschip MCS9865 chip, assuming that the EEPROM on the card was programmed in accordance with Table 6 of the MCS9865 EEPROM Application Note version 0.3 dated 16-May-2008, available from the Moschip web site (registration required). This patch is based on an earlier patch [1] for the SYBA 6x serial port card by Ira W. Snyder. [1]: http://www.gossamer-threads.com/lists/linux/kernel/1162435 Signed-off-by: Eric Smith Signed-off-by: Greg Kroah-Hartman

serial: 8250_pnp: add Intermec CV60 touchscreen device

2011-10-03T18:39:48+00:00

commit ab8ba3a2d2cba6a658ef596cd5b2e0905b6c8a9f upstream. It would have been nice if Intermec had supplied a PNP0501 _CID for the COM3 device, but they didn't, so we have to recognize it explicitly. Reference: https://bugzilla.kernel.org/show_bug.cgi?id=40612 CC: Jeff Chua Signed-off-by: Bjorn Helgaas Acked-by: Alan Cox Signed-off-by: Greg Kroah-Hartman

omap-serial: Allow IXON and IXOFF to be disabled.

2011-10-03T18:39:48+00:00

commit b280a97d1caf6fe1d38b51ebb31219391f5ad1a0 upstream. Fixes logic bug that software flow control cannot be disabled, because serial_omap_configure_xonxoff() is not called if both IXON and IXOFF bits are cleared. Signed-off-by: Nick Pelly Acked-by: Govindraj.R Tested-by: Govindraj.R Signed-off-by: Greg Kroah-Hartman

SERIAL: SC26xx: Fix link error.

2011-08-05T04:58:41+00:00

commit f2eb3cdf14457fccb14ae8c4d7d7cee088cd3957 upstream. Kconfig allows enabling console support for the SC26xx driver even when it's configured as a module resulting in a: ERROR: "uart_console_device" [drivers/tty/serial/sc26xx.ko] undefined! modpost error since the driver was merged in eea63e0e8a60d00485b47fb6e75d9aa2566b989b [SC26XX: New serial driver for SC2681 uarts] in 2.6.25. Fixed by only allowing console support to be enabled if the driver is builtin. Signed-off-by: Ralf Baechle Cc: linux-serial@vger.kernel.org Cc: linux-kernel@vger.kernel.org Cc: linux-mips@linux-mips.org Acked-by: Alan Cox Signed-off-by: Greg Kroah-Hartman

tty/serial: Fix XSCALE serial ports, e.g. ce4100

2011-08-05T04:58:41+00:00

commit 5568181f188ae9485a0cdbea5ea48f63d186a298 upstream. Commit 4539c24fe4f92c09ee668ef959d3e8180df619b9 "tty/serial: Add explicit PORT_TEGRA type" introduced separate flags describing the need for IER bits UUE and RTOIE. Both bits are required for the XSCALE port type. While that patch updated uart_config[] as required, the auto-probing code wasn't updated to set the RTOIE flag when an XSCALE port type was detected. This caused such ports to stop working. This patch rectifies that. Reported-by: Sebastian Andrzej Siewior Tested-by: Sebastian Andrzej Siewior Signed-off-by: Stephen Warren Signed-off-by: Greg Kroah-Hartman

Merge branch 'at91/fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/arm/linux-2.6-arm-soc

2011-07-04T22:54:18+00:00

* 'at91/fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/arm/linux-2.6-arm-soc: AT91: Change nand buswidth logic to match hardware default configuration at91: Use "pclk" as con_id on at91cap9 and at91rm9200 at91: fix udc, ehci and mmc clock device name for cap9/9g45/9rl atmel_serial: fix internal port num at91: fix at91_set_serial_console: use platform device id

Merge branch 'tty-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/tty-2.6

2011-06-28T18:14:55+00:00

* 'tty-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/tty-2.6: serial: bcm63xx_uart: fix irq storm after rx fifo overrun. amba pl011: platform data for reg lockup and glitch v2 amba pl011: workaround for uart registers lockup tty: n_gsm: improper skb_pull() use was leaking framed data tty: n_gsm: Fixed logic to decode break signal from modem status TTY: ntty, add one more sanity check TTY: ldisc, do not close until there are readers 8250: Fix capabilities when changing the port type 8250_pci: Fix missing const from merges ARM: SAMSUNG: serial: Fix on handling of one clock source for UART serial: ioremap warning fix for jsm driver. 8250_pci: add -ENODEV code for Intel EG20T PCH

drivers/tty/serial/8250_pci.c: fix warning

2011-06-28T01:00:13+00:00

Fis the warning drivers/tty/serial/8250_pci.c:1457: warning: initialization from incompatible pointer type Cc: Greg KH Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds