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authorKarsten Graul <kgraul@linux.ibm.com>2020-10-07 22:57:43 +0200
committerJakub Kicinski <kuba@kernel.org>2020-10-09 18:15:47 -0700
commitf29fa003996da1b9a133713db9fb5a344eaada4f (patch)
treec0af2487bb98530e54e8401d2cdc72bac1815233 /net/smc
parent9047a617dc2f8ea0575ef80c38e57ed52b712a1f (diff)
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net/smc: restore smcd_version when all ISM V2 devices failed to init
Field ini->smcd_version is set to SMC_V2 before calling smc_listen_ism_init(). This clears the V1 bit that may be set. When all matching ISM V2 devices fail to initialize then the smcd_version field needs to get restored to allow any possible V1 devices to initialize. And be consistent, always go to the not_found label when no device was found. Signed-off-by: Karsten Graul <kgraul@linux.ibm.com> Signed-off-by: Jakub Kicinski <kuba@kernel.org>
Diffstat (limited to 'net/smc')
-rw-r--r--net/smc/af_smc.c6
1 files changed, 5 insertions, 1 deletions
diff --git a/net/smc/af_smc.c b/net/smc/af_smc.c
index f481f0ed2b78..82be0bd0f6e8 100644
--- a/net/smc/af_smc.c
+++ b/net/smc/af_smc.c
@@ -1481,11 +1481,12 @@ static void smc_find_ism_v2_device_serv(struct smc_sock *new_smc,
struct smc_clc_v2_extension *smc_v2_ext;
struct smc_clc_msg_smcd *pclc_smcd;
unsigned int matches = 0;
+ u8 smcd_version;
u8 *eid = NULL;
int i;
if (!(ini->smcd_version & SMC_V2) || !smcd_indicated(ini->smc_type_v2))
- return;
+ goto not_found;
pclc_smcd = smc_get_clc_msg_smcd(pclc);
smc_v2_ext = smc_get_clc_v2_ext(pclc);
@@ -1519,6 +1520,7 @@ static void smc_find_ism_v2_device_serv(struct smc_sock *new_smc,
}
/* separate - outside the smcd_dev_list.lock */
+ smcd_version = ini->smcd_version;
for (i = 0; i < matches; i++) {
ini->smcd_version = SMC_V2;
ini->is_smcd = true;
@@ -1528,6 +1530,8 @@ static void smc_find_ism_v2_device_serv(struct smc_sock *new_smc,
continue;
return; /* matching and usable V2 ISM device found */
}
+ /* no V2 ISM device could be initialized */
+ ini->smcd_version = smcd_version; /* restore original value */
not_found:
ini->smcd_version &= ~SMC_V2;