> -----Original Message----- > From: Greg KH [mailto:greg@xxxxxxxxx] > Sent: Sunday, December 12, 2010 8:52 AM > As for build issues, try to make a minimal working config for > your system, using 'make localmodconfig'. That will speed up > your build time immensely as well as reduce your chances of > build and runtime problems with the intermediate kernels. Thank-you, that did help immensely. Here's the 'git bisect' result... -------------- 7a56aa45982bb87bfca98a2832b5ae782c03364a is the first bad commit commit 7a56aa45982bb87bfca98a2832b5ae782c03364a Author: Yegor Yefremov <yegor_sub1@xxxxxxxxxxxxxxxx> Date: Wed Jun 16 16:29:55 2010 +0200 serial: add UART_CAP_EFR and UART_CAP_SLEEP flags to 16C950 UARTs definition Adding UART_CAP_EFR and UART_CAP_SLEEP flags will enable sleep mode and automatic CTS flow control for 16C950 UARTs. It will also avoid capabilities detection warning like this: "ttyS0: detected caps 00000700 should be 00000100" Signed-off-by: Yegor Yefremov <yegorslists@xxxxxxxxxxxxxx> Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxx> :040000 040000 1776ca8d5c653834363c0778b5b404ee52bd2d69 b81cfe4f302a674935181bd248641873820517e5 M drivers -------------- Indeed, if I remove the UART_CAP_EFR flag from later kernel revisions there is no problem. Here is the 'dmesg' output for 8250 after removing UART_CAP_EFR... -------------- [ 0.980209] Serial: 8250/16550 driver, 32 ports, IRQ sharing enabled [ 1.245280] serial8250: ttyS1 at I/O 0x2f8 (irq = 3) is a 16550A [ 1.266813] 00:09: ttyS1 at I/O 0x2f8 (irq = 3) is a 16550A [ 1.266936] serial 0000:02:00.0: PCI INT A -> GSI 18 (level, low) -> IRQ 18 [ 1.266954] 1 ports detected on Oxford PCI Express device [ 1.267029] ttyS4: detected caps 00000700 should be 00000500 [ 1.267043] 0000:02:00.0: ttyS4 at MMIO 0xfd5fd000 (irq = 18) is a 16C950/954 [ 1.267095] serial 0000:03:00.0: PCI INT A -> GSI 16 (level, low) -> IRQ 16 [ 1.267105] 4 ports detected on Oxford PCI Express device [ 1.267175] ttyS5: detected caps 00000700 should be 00000500 [ 1.267180] 0000:03:00.0: ttyS5 at MMIO 0xfc9fd000 (irq = 16) is a 16C950/954 [ 1.267269] ttyS6: detected caps 00000700 should be 00000500 [ 1.267274] 0000:03:00.0: ttyS6 at MMIO 0xfc9fd200 (irq = 16) is a 16C950/954 [ 1.267362] ttyS7: detected caps 00000700 should be 00000500 [ 1.267366] 0000:03:00.0: ttyS7 at MMIO 0xfc9fd400 (irq = 16) is a 16C950/954 [ 1.267454] ttyS8: detected caps 00000700 should be 00000500 [ 1.267459] 0000:03:00.0: ttyS8 at MMIO 0xfc9fd600 (irq = 16) is a 16C950/954 [ 1.267505] serial 0000:04:00.0: PCI INT A -> GSI 18 (level, low) -> IRQ 18 [ 1.267514] 2 ports detected on Oxford PCI Express device [ 1.267583] ttyS9: detected caps 00000700 should be 00000500 [ 1.267588] 0000:04:00.0: ttyS9 at MMIO 0xfcffd000 (irq = 18) is a 16C950/954 [ 1.267678] ttyS10: detected caps 00000700 should be 00000500 [ 1.267683] 0000:04:00.0: ttyS10 at MMIO 0xfcffd200 (irq = 18) is a 16C950/954 [ 1.267723] serial 0000:06:00.0: PCI INT A -> GSI 19 (level, low) -> IRQ 19 [ 1.288452] 0000:06:00.0: ttyS11 at I/O 0xcf00 (irq = 19) is a 16550A [ 1.309208] 0000:06:00.0: ttyS12 at I/O 0xcf08 (irq = 19) is a 16550A [ 1.329963] 0000:06:00.0: ttyS13 at I/O 0xcf10 (irq = 19) is a 16550A [ 1.350723] 0000:06:00.0: ttyS14 at I/O 0xcf18 (irq = 19) is a 16550A -------------- 00:09 is the on-board serial controller, so that's ttyS1 0000:02:00.0 is a 1-port Rev3 IQ Express, that's ttyS4 0000:03:00.0 is a 4-port Rev3 IQ Express, that's ttyS5-ttyS8 0000:04:00.0 is a 2-port Rev3 IQ Express, that's ttyS9-ttyS10 0000:06:00.0 is a 4-port Rev2 IQ Express, that's ttyS11-ttyS14 (these had no problem). Thanks, Lee. -- To unsubscribe from this list: send the line "unsubscribe linux-serial" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
