linux/drivers/serial, branch v2.6.26

serial8250: sanity check nr_uarts on all paths.

2008-07-12T21:33:41Z

I had 8250.nr_uarts=16 in the boot line of a test kernel and I had a weird mysterious crash in sysfs. After taking an in-depth look I realized that CONFIG_SERIAL_8250_NR_UARTS was set to 4 and I was walking off the end of the serial8250_ports array. Ouch!!! Don't let this happen to someone else. Signed-off-by: Eric W. Biederman Acked-by: Alan Cox Cc: Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds

serial: fix serial_match_port() for dynamic major tty-device numbers

2008-07-04T17:40:04Z

As reported by Vipul Gandhi, the current serial_match_port() doesn't work for tty-devices using dynamic major number allocation. Fix it. It oopses if you suspend a serial port with _dynamic_ major number. ATM, I think, there's only the drivers/serial/jsm/jsm_driver.c driver, that does it in-tree. Signed-off-by: Guennadi Liakhovetski Tested-by: Vipul Gandhi Cc: Alan Cox Cc: Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds

Blackfin Serial Driver: Use timer to poll CTS PIN instead of workqueue.

2008-06-19T09:46:39Z

This allows other threads to run when the serial driver polls the CTS PIN in a loop. Signed-off-by: Sonic Zhang Signed-off-by: Bryan Wu

Blackfin serial driver: fix up tty core set_ldisc API change breakage bug

2008-06-07T07:36:33Z

This is the patch that follows Linus's modification about set_ldisc. Graf has built and tested it on BF537 using Linus's git Tree. Signed-off-by: Graf Yang Signed-off-by: Bryan Wu

Blackfin Serial Driver: Clean up BF54x macro in blackfin UART driver.

2008-06-03T04:19:45Z

Hide difference in head file. Signed-off-by: Sonic Zhang Signed-off-by: Bryan Wu

atmel_serial: filter out FP during baud rate detection

2008-06-06T18:29:12Z

I made a change to u-boot that used the FP (Fractional Part) field of BRGR to achieve more accurate baud rate generation. Unfortunately, the atmel_serial driver looks at the whole BRGR register when trying to detect the baud rate that the port is currently running at, so setting FP to a nonzero value breaks the baud rate detection. I'll sit on the u-boot patch for a while longer, but this is clearly a bug in the atmel_serial driver which should be fixed. Signed-off-by: Haavard Skinnemoen Acked-by: Andrew Victor Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds

serial: fix driver_name conflicts

2008-06-06T18:29:09Z

Some drivers are using too generic "serial" name for driver_name, this might cause issues, like this: Freescale QUICC Engine UART device driver proc_dir_entry 'serial' already registered Call Trace: [cf82de50] [c0007f7c] show_stack+0x4c/0x1ac (unreliable) [cf82de90] [c00b03fc] proc_register+0xfc/0x1ac [cf82dec0] [c00b05c8] create_proc_entry+0x60/0xac [cf82dee0] [c00b23dc] proc_tty_register_driver+0x60/0x98 [cf82def0] [c016dbd8] tty_register_driver+0x1b4/0x228 [cf82df20] [c0184d70] uart_register_driver+0x144/0x194 [cf82df40] [c030a378] ucc_uart_init+0x2c/0x94 [cf82df50] [c02f21a0] kernel_init+0x98/0x27c [cf82dff0] [c000fa74] kernel_thread+0x44/0x60 ^^ The board is using ucc_uart.c and 8250.c, both registered as "serial". This patch fixes two drivers that are using "serial" for driver_name and not "ttyS" for dev_name. Drivers that are using "ttyS" for dev_name, will conflict anyway, so we don't bother with these. Signed-off-by: Anton Vorontsov Acked-by: Alan Cox Acked-By: Timur Tabi Acked-by: Maciej W. Rozycki Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds

Fix uart_set_ldisc() function type

2008-06-04T17:35:03Z

Commit 64e9159f5d2c4edf5fa6425031e556f8fddaf7e6 ("serial_core: uart_set_ldisc infrastructure") introduced the ability for low-level serial drivers to be informed when the tty ldisc changes. However, the actual tty-layer function that does this callback for serial devices was declared with the wrong type, having a spurious and unused 'ldisc' argument. This fixed the resulting compiler warning by just removing it. Acked-by: Blithering Idiot Signed-off-by: Linus Torvalds

serial_core: uart_set_ldisc infrastructure

2008-06-03T15:20:17Z

The tty layer provides a callback that is used when the line discipline is changed. Some hardware uses this to configure hardware specific features such as IrDA mode on serial ports. Unfortunately the serial layer does not provide this feature or pass it down to drivers. Blackfin used to hack around this by rewriting the tty ops, but those are now properly shared and const so the hack fails. Instead provide the proper operations. This change plus a follow up from the Blackfin guys is needed to avoid blackfin losing features in this release. Signed-off-by: Alan Cox Signed-off-by: Linus Torvalds

8250 Serial Driver: revert extra IRQ flag definition patch

2008-05-31T08:10:04Z

As Russell pointed out, original patch will break some serial configurations because of the dependency of the header file. Revert it first and try to find out other solution later Cc: Javier Herrero Cc: Alan Cox Cc: Russell King Signed-off-by: Bryan Wu