On Wed, Oct 19, 2016 at 05:13:41PM -0500, Nathan Zimmer wrote: > On 10/19/2016 04:07 AM, Sean Young wrote: > >So with 3.6.0: > > > >>[ 2.079980] Serial: 8250/16550 driver, 8 ports, IRQ sharing disabled > >>[ 2.100887] serial8250: ttyS1 at I/O 0x2f8 (irq = 3) is a 16550A > >>[ 2.101715] serial 00:04: unable to assign resources > >>[ 2.102174] serial: probe of 00:04 failed with error -16 > >The pnp probe fails for some reason. I don't understand why. > > > >With 3.7.0: > > > >>[ 2.062700] Serial: 8250/16550 driver, 8 ports, IRQ sharing disabled > >>[ 2.063250] serial 00:04: [io 0x02f8-0x02ff] > >>[ 2.063875] serial 00:04: [irq 12] > >>[ 2.064345] serial 00:04: [dma 18446744073709551615 disabled] > >>[ 2.065540] serial 00:04: activated > >>[ 2.086442] 00:04: ttyS1 at I/O 0x2f8 (irq = 12) is a 16550A > >Now the pnp probe succeeds (with broken irq from pnp). > > > >Can you please check if there is a wrong irq configured in the bios setup > >or if there is a bios update available? I don't know why this worked in > >the first place. > > Apparently this is the latest bios available for these nodes. > Also in the bios setup screens I don't see anything for changing irq numbers > for serial console. > But this is a cluster so sometimes thing get hidden to keep everything > uniform as possible. > > If you want to point me to the pnp probe code you would be suspicious of I > can try to debug and see what is going there. That would be great, thanks. A good start would be to boot 3.6.0 with "loglevel=7 pnp.debug=1" and hopefully that will show why the probe used to fail. Also, does the issue still exist with a more contemporary kernel? Sean -- 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
