On Fri, 2026-05-08 at 13:16 +0530, Aboorva Devarajan wrote: > On Fri, 2026-05-01 at 09:41 +0530, Ritesh Harjani (IBM) wrote: > > While going over papr-hvpipe code, there were a few fixes which were > > identified. > > This patch series is an attempt to fix those along with some misc cleanups. > > Me and Haren are trying to get these patches verified on a real HW. The > > tests > > are not straight forward and we are waiting for the results. > > Will update on the test results once we hear back from the internal test > > team. > > > > v2->v3: > > ====== > > 1. Rearranged the patches in such a way that it is easier to backport the > > fixes > > if required. > > 2. Clubbed patch-8 and patch-10 (of v2) since they both were changing the > > same function. > > 3. Handled ret>=0 case in copy_to_user patch, when the user itself may > > request > > for 0 effective bytes (after the HDR_LEN). > > > Since this is CCed to stable, it is currently being evaluated by RSCT. > We can merge it once we receive an Acked-by from RSCT. > >
An update from RSCT: with the patch, the earlier issues observed are now resolved, and the inband RMC connection is successfully established with the patched kernel. Thanks, Aboorva > > > > > [v2]: > > https://lore.kernel.org/linuxppc-dev/[email protected]/ > > > > v1->v2: > > ======== > > 1. Fix a possible deadlock due to use of spin_lock instead of > > spin_lock_irqsave. > > 2. Prevent kernel stack uninit memory leak to userspace > > 3. Fix the race condition in null-ptr-deref case where there may be an > > msg pending to be consumed from the hvpipe. > > 4. Fixed error handling in init routine in patch-10 > > > > [v1]: > > https://lore.kernel.org/linuxppc-dev/[email protected]/#t > > > > Ritesh Harjani (IBM) (9): > > pseries/papr-hvpipe: Fix race with interrupt handler > > pseries/papr-hvpipe: Prevent kernel stack memory leak to userspace > > pseries/papr-hvpipe: Fix null ptr deref in papr_hvpipe_dev_create_handle() > > pseries/papr-hvpipe: Fix & simplify error handling in papr_hvpipe_init() > > pseries/papr-hvpipe: Fix the usage of copy_to_user() > > pseries/papr-hvpipe: Simplify spin unlock usage in > > papr_hvpipe_handle_release() > > pseries/papr-hvpipe: Kill task_struct pointer from struct > > hvpipe_source_info > > pseries/papr-hvpipe: Refactor and simplify hvpipe_rtas_recv_msg() > > pseries/papr-hvpipe: Fix style and checkpatch issues in > > enable_hvpipe_IRQ() > > > > arch/powerpc/platforms/pseries/papr-hvpipe.c | 181 ++++++++++--------- > > arch/powerpc/platforms/pseries/papr-hvpipe.h | 1 - > > 2 files changed, 97 insertions(+), 85 deletions(-) > > > > -- > > 2.39.5
