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net/smc: increase device refcount for added link group 

[ Upstream commit b3cb53c05f ]

SMCD link groups belong to certain ISM-devices and SMCR link group
links belong to certain IB-devices. Increase the refcount for
these devices, as long as corresponding link groups exist.

Signed-off-by: Ursula Braun <ubraun@linux.ibm.com>
Signed-off-by: Karsten Graul <kgraul@linux.ibm.com>
Signed-off-by: Jakub Kicinski <jakub.kicinski@netronome.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>
5.4-rM2-2.2.x-imx-squashed
Ursula Braun 2019-10-09 10:07:45 +02:00 committed by Greg Kroah-Hartman
parent 68b4c10813
commit 2674c57c3b
1 changed files with 7 additions and 2 deletions
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9
net/smc/smc_core.c
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@ -231,10 +231,12 @@ static int smc_lgr_create(struct smc_sock *smc, struct smc_init_info *ini)
lgr->conns_all = RB_ROOT;
if (ini->is_smcd) {
/* SMC-D specific settings */
get_device(&ini->ism_dev->dev);
lgr->peer_gid = ini->ism_gid;
lgr->smcd = ini->ism_dev;
} else {
/* SMC-R specific settings */
get_device(&ini->ib_dev->ibdev->dev);
lgr->role = smc->listen_smc ? SMC_SERV : SMC_CLNT;
memcpy(lgr->peer_systemid, ini->ib_lcl->id_for_peer,
SMC_SYSTEMID_LEN);
@ -433,10 +435,13 @@ static void smc_lgr_free_bufs(struct smc_link_group *lgr)
static void smc_lgr_free(struct smc_link_group *lgr)
{
smc_lgr_free_bufs(lgr);
if (lgr->is_smcd)
if (lgr->is_smcd) {
smc_ism_put_vlan(lgr->smcd, lgr->vlan_id);
else
put_device(&lgr->smcd->dev);
} else {
smc_link_clear(&lgr->lnk[SMC_SINGLE_LINK]);
put_device(&lgr->lnk[SMC_SINGLE_LINK].smcibdev->ibdev->dev);
}
kfree(lgr);
}