Change in osmo-bts[2021q1]: osmo-bts-trx: fix hopping pointer bug in trx_sched_fn()

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fixeria gerrit-no-reply at lists.osmocom.org
Thu May 20 17:38:39 UTC 2021


fixeria has uploaded a new patch set (#2) to the change originally created by osmith. ( https://gerrit.osmocom.org/c/osmo-bts/+/24313 )

Change subject: osmo-bts-trx: fix hopping pointer bug in trx_sched_fn()
......................................................................

osmo-bts-trx: fix hopping pointer bug in trx_sched_fn()

In change [1] together with the actual implementation I introduced
a serious bug to trx_sched_fn(): if a timeslot is configured to use
frequency hopping, both 'pinst' and 'l1h' pointers are *overwriten*
in the inner loop, so the Downlink burst is re-directed to the
approproate PHY instance.  However, if a subsequent timeslot is not
hopping, the Downlink burst would be re-directed to the wrong PHY
instance because both pointers were overwriten during a previous
iteration.

Let's add another 'struct phy_instance' pointer to the inner loop,
so it's properly re-initialized for each timeslot iteration.

Change-Id: I9afbbef8dc5d885763356470c27d4392dce8e815
Fixes: [1] I68f4ae09fd0789ad0d8f1c1e17e17dfc4de8e462
Related: SYS#4868, OS#4546
---
M src/osmo-bts-trx/scheduler_trx.c
1 file changed, 6 insertions(+), 5 deletions(-)


  git pull ssh://gerrit.osmocom.org:29418/osmo-bts refs/changes/13/24313/2
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Gerrit-Project: osmo-bts
Gerrit-Branch: 2021q1
Gerrit-Change-Id: I9afbbef8dc5d885763356470c27d4392dce8e815
Gerrit-Change-Number: 24313
Gerrit-PatchSet: 2
Gerrit-Owner: osmith <osmith at sysmocom.de>
Gerrit-Reviewer: Jenkins Builder
Gerrit-Reviewer: fixeria <vyanitskiy at sysmocom.de>
Gerrit-Reviewer: osmith <osmith at sysmocom.de>
Gerrit-MessageType: newpatchset
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