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net/smc: restore smcd_version when all ISM V2 devices failed to init

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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>
This commit is contained in:
Karsten Graul 2020-10-07 22:57:43 +02:00 committed by Jakub Kicinski
parent 9047a617dc
commit f29fa00399
1 changed files with 5 additions and 1 deletions
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6
net/smc/af_smc.c
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@ -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;