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| author |   Nathan Lynch <nathanl@linux.ibm.com> | 2021-01-06 20:59:00 -0600 |
|---|---|---|
| committer |   Michael Ellerman <mpe@ellerman.id.au> | 2021-02-09 01:09:46 +1100 |
| commit | 768d70e19ba525debd571b36e6d0ab19956c63d7 (patch) | |
| tree | 94f1dc728f5757c25f81938db432e1e24d3fcbdc /arch/powerpc/platforms/pseries/dlpar.c | |
| parent | powerpc/64s: Implement ptep_clear_flush_young that does not flush TLBs (diff) | |
| download | linux-dev-768d70e19ba525debd571b36e6d0ab19956c63d7.tar.xz linux-dev-768d70e19ba525debd571b36e6d0ab19956c63d7.zip | |
powerpc/pseries/dlpar: handle ibm, configure-connector delay status
dlpar_configure_connector() has two problems in its handling of
ibm,configure-connector's return status:
1. When the status is -2 (busy, call again), we call
ibm,configure-connector again immediately without checking whether
to schedule, which can result in monopolizing the CPU.
2. Extended delay status (9900..9905) goes completely unhandled,
causing the configuration to unnecessarily terminate.
Fix both of these issues by using rtas_busy_delay().
Fixes: ab519a011caa ("powerpc/pseries: Kernel DLPAR Infrastructure")
Signed-off-by: Nathan Lynch <nathanl@linux.ibm.com>
Reviewed-by: Tyrel Datwyler <tyreld@linux.ibm.com>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Link: https://lore.kernel.org/r/20210107025900.410369-1-nathanl@linux.ibm.com
Diffstat (limited to 'arch/powerpc/platforms/pseries/dlpar.c')
| -rw-r--r-- | arch/powerpc/platforms/pseries/dlpar.c | 7 |
1 files changed, 3 insertions, 4 deletions
diff --git a/arch/powerpc/platforms/pseries/dlpar.c b/arch/powerpc/platforms/pseries/dlpar.c index deb48b41d488..233503fcf8f0 100644 --- a/arch/powerpc/platforms/pseries/dlpar.c +++ b/arch/powerpc/platforms/pseries/dlpar.c @@ -127,7 +127,6 @@ void dlpar_free_cc_nodes(struct device_node *dn) #define NEXT_PROPERTY 3 #define PREV_PARENT 4 #define MORE_MEMORY 5 -#define CALL_AGAIN -2 #define ERR_CFG_USE -9003 struct device_node *dlpar_configure_connector(__be32 drc_index, @@ -168,6 +167,9 @@ struct device_node *dlpar_configure_connector(__be32 drc_index, spin_unlock(&rtas_data_buf_lock); + if (rtas_busy_delay(rc)) + continue; + switch (rc) { case COMPLETE: break; @@ -216,9 +218,6 @@ struct device_node *dlpar_configure_connector(__be32 drc_index, last_dn = last_dn->parent; break; - case CALL_AGAIN: - break; - case MORE_MEMORY: case ERR_CFG_USE: default: |