diff options
| author | Jakub Kicinski <kuba@kernel.org> | 2024-03-07 21:19:05 +0300 |
|---|---|---|
| committer | Jakub Kicinski <kuba@kernel.org> | 2024-03-07 21:29:36 +0300 |
| commit | e3afe5dd3abea43e056a004df02fb49f24cc5ad7 (patch) | |
| tree | a8f38510fe1aeee32a54112fdee27e1948cde35e /drivers/firewire/core-card.c | |
| parent | a148f82c457f957cdc9445101882c225aa8c3ff0 (diff) | |
| parent | df4793505abd5df399bc6d9a4d8fe81761f557cd (diff) | |
| download | linux-e3afe5dd3abea43e056a004df02fb49f24cc5ad7.tar.xz | |
Merge git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net
Cross-merge networking fixes after downstream PR.
No conflicts.
Adjacent changes:
net/core/page_pool_user.c
0b11b1c5c320 ("netdev: let netlink core handle -EMSGSIZE errors")
429679dcf7d9 ("page_pool: fix netlink dump stop/resume")
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
Diffstat (limited to 'drivers/firewire/core-card.c')
| -rw-r--r-- | drivers/firewire/core-card.c | 14 |
1 files changed, 13 insertions, 1 deletions
diff --git a/drivers/firewire/core-card.c b/drivers/firewire/core-card.c index 8aaa7fcb2630..401a77e3b5fa 100644 --- a/drivers/firewire/core-card.c +++ b/drivers/firewire/core-card.c @@ -500,7 +500,19 @@ static void bm_work(struct work_struct *work) fw_notice(card, "phy config: new root=%x, gap_count=%d\n", new_root_id, gap_count); fw_send_phy_config(card, new_root_id, generation, gap_count); - reset_bus(card, true); + /* + * Where possible, use a short bus reset to minimize + * disruption to isochronous transfers. But in the event + * of a gap count inconsistency, use a long bus reset. + * + * As noted in 1394a 8.4.6.2, nodes on a mixed 1394/1394a bus + * may set different gap counts after a bus reset. On a mixed + * 1394/1394a bus, a short bus reset can get doubled. Some + * nodes may treat the double reset as one bus reset and others + * may treat it as two, causing a gap count inconsistency + * again. Using a long bus reset prevents this. + */ + reset_bus(card, card->gap_count != 0); /* Will allocate broadcast channel after the reset. */ goto out; } |