Frederik Deweerdt wrote: > On Fri, Jan 26, 2007 at 06:17:03PM +0000, Jose Goncalves wrote: > >> Frederik Deweerdt wrote: >> >>> On Fri, Jan 26, 2007 at 03:50:25PM +0000, Jose Goncalves wrote: >>> >>> >>>> I'm having a problem with the latest 2.6.16 kernel (I've found the >>>> problem on 2.6.16.37 and 2.6.16.38). I have a application that retreives >>>> data from a GPS connected on a serial port. From time to time a get a >>>> kernel Oops, like this: >>>> >>>> >>>> >>> Could you send your .config? >>> >>> >> Here it goes... >> >> > Thanks. It looks like something is wrong with port->ops->startup() in > uart_startup(), could you apply the following patch and report the > results? And btw, you're using a plain 8250 serial port, isn't it? >
OK. I've applied the patch and I'm now waiting for the kernel Oops... sometimes it takes two days until it happens. I'm using a standard 16550A serial controller found on my hardware, that is a PC/104 SBC: http://www.icop.com.tw/products_detail.asp?ProductID=70 We have a custom hardware that has another serial controller (TL16C554A) with 4 extra serial ports (also, 16550A type), and the problem happens in a test program that is retreiving data from ttyS0 (from the SBC) and ttyS3 (from our custom hardware). The serial ports initialization, as reported by the kernel: [ 15.216847] Serial: 8250/16550 driver $Revision: 1.90 $ 6 ports, IRQ sharing disabled [ 15.219517] serial8250: ttyS0 at I/O 0x3f8 (irq = 4) is a 16550A [ 15.221963] serial8250: ttyS1 at I/O 0x2f8 (irq = 3) is a 16550A [ 15.223907] serial8250: ttyS2 at I/O 0x3e8 (irq = 5) is a 16550A [ 15.225757] serial8250: ttyS3 at I/O 0x2e8 (irq = 5) is a 16550A [ 15.227644] serial8250: ttyS4 at I/O 0x1a0 (irq = 6) is a 16550A [ 15.229656] serial8250: ttyS5 at I/O 0x1a8 (irq = 6) is a 16550A With your patch I'm now getting the following for each iteration of my test program: <4>[ 298.918962] type is 4 <4>[ 298.919011] ops is c0292f00 <4>[ 298.919033] ops->startup is c01bd777 <4>[ 299.436980] type is 4 <4>[ 299.437030] ops is c0292f00 <4>[ 299.437051] ops->startup is c01bd777 I don't know if it's relevant or not but the kernel is running in NFS-Root mode. Best regards, José Gonçalves - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to [EMAIL PROTECTED] More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
