| Message ID | 20220707162313.869213-1-frank.heimes@canonical.com |
|---|---|
| Headers | show |
| Series | Kernel oops while removing device from cio_ignore list (LP: 1980951) | expand |
On 7/7/22 10:23, frank.heimes@canonical.com wrote: > BugLink: https://bugs.launchpad.net/bugs/1980951 > > SRU Justification: > > [Impact] > > * A kernel Oops occurs when a device is removed from the cio_ignore list > (that is used to hide ccw devices) on a system with non-I/O subchannels > (e.g. SCM or CHSC subchannels). > > * As a result, previously ignored devices cannot be activated again, > and new devices cannot be found. > > [Fix] > > * 0c3812c347bf 0c3812c347bfb0dc213556a195e79850c55702f5 "s390/cio: derive cdev information only for IO-subchannels" > > [Test Plan] > > * An IBM zSystems or LinuxONE LPAR with with non-I/O subchannels. > > * Ubuntu Server 22.04 LTS (with GA kernel 5.15) installed. > > * Define a cio_ignore list (to hide ccw devices). > > * Remove a device from the cio_ignore list. > > * Due to hardware requirements this test needs to be conducted by IBM. > > [Where problems could occur] > > * General problems may occur with ccw device activation/deactivation > in case the new initialization is erroneous. > > * Issues may also have an impact on the type of ccw devices, > and may no longer be limited to non-I/O subchannels. > > * Things could still go wrong in case cdev is still not properly > derived from sch-type SUBCHANNEL_TYPE_IO. > > [Other Info] > > * The commit is upstream since kernel 5.16 (next-20220315). > > Vineeth Vijayan (1): > s390/cio: derive cdev information only for IO-subchannels > > drivers/s390/cio/css.c | 9 ++++++--- > 1 file changed, 6 insertions(+), 3 deletions(-) > Acked-by: Tim Gardner <tim.gardner@canonical.com>
Acked-by: Luke Nowakowski-Krijger <luke.nowakowskikrijger@canonical.com> On Thu, Jul 7, 2022 at 9:24 AM <frank.heimes@canonical.com> wrote: > BugLink: https://bugs.launchpad.net/bugs/1980951 > > SRU Justification: > > [Impact] > > * A kernel Oops occurs when a device is removed from the cio_ignore list > (that is used to hide ccw devices) on a system with non-I/O subchannels > (e.g. SCM or CHSC subchannels). > > * As a result, previously ignored devices cannot be activated again, > and new devices cannot be found. > > [Fix] > > * 0c3812c347bf 0c3812c347bfb0dc213556a195e79850c55702f5 "s390/cio: derive > cdev information only for IO-subchannels" > > [Test Plan] > > * An IBM zSystems or LinuxONE LPAR with with non-I/O subchannels. > > * Ubuntu Server 22.04 LTS (with GA kernel 5.15) installed. > > * Define a cio_ignore list (to hide ccw devices). > > * Remove a device from the cio_ignore list. > > * Due to hardware requirements this test needs to be conducted by IBM. > > [Where problems could occur] > > * General problems may occur with ccw device activation/deactivation > in case the new initialization is erroneous. > > * Issues may also have an impact on the type of ccw devices, > and may no longer be limited to non-I/O subchannels. > > * Things could still go wrong in case cdev is still not properly > derived from sch-type SUBCHANNEL_TYPE_IO. > > [Other Info] > > * The commit is upstream since kernel 5.16 (next-20220315). > > Vineeth Vijayan (1): > s390/cio: derive cdev information only for IO-subchannels > > drivers/s390/cio/css.c | 9 ++++++--- > 1 file changed, 6 insertions(+), 3 deletions(-) > > -- > 2.25.1 > > > -- > kernel-team mailing list > kernel-team@lists.ubuntu.com > https://lists.ubuntu.com/mailman/listinfo/kernel-team >
On 07.07.22 18:23, frank.heimes@canonical.com wrote: > BugLink: https://bugs.launchpad.net/bugs/1980951 > > SRU Justification: > > [Impact] > > * A kernel Oops occurs when a device is removed from the cio_ignore list > (that is used to hide ccw devices) on a system with non-I/O subchannels > (e.g. SCM or CHSC subchannels). > > * As a result, previously ignored devices cannot be activated again, > and new devices cannot be found. > > [Fix] > > * 0c3812c347bf 0c3812c347bfb0dc213556a195e79850c55702f5 "s390/cio: derive cdev information only for IO-subchannels" > > [Test Plan] > > * An IBM zSystems or LinuxONE LPAR with with non-I/O subchannels. > > * Ubuntu Server 22.04 LTS (with GA kernel 5.15) installed. > > * Define a cio_ignore list (to hide ccw devices). > > * Remove a device from the cio_ignore list. > > * Due to hardware requirements this test needs to be conducted by IBM. > > [Where problems could occur] > > * General problems may occur with ccw device activation/deactivation > in case the new initialization is erroneous. > > * Issues may also have an impact on the type of ccw devices, > and may no longer be limited to non-I/O subchannels. > > * Things could still go wrong in case cdev is still not properly > derived from sch-type SUBCHANNEL_TYPE_IO. > > [Other Info] > > * The commit is upstream since kernel 5.16 (next-20220315). > > Vineeth Vijayan (1): > s390/cio: derive cdev information only for IO-subchannels > > drivers/s390/cio/css.c | 9 ++++++--- > 1 file changed, 6 insertions(+), 3 deletions(-) > Applied to jammy:linux/master-next. Thanks. -Stefan