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bnxt_en: Fix wrong return value check in bnxt_close_nic() 

The wait_event_interruptible_timeout() function returns 0
if the timeout elapsed, -ERESTARTSYS if it was interrupted
by a signal, and the remaining jiffies otherwise if the
condition evaluated to true before the timeout elapsed.

Driver should have checked for zero return value instead of
a positive value.

MChan: Print a warning for -ERESTARTSYS.  The close operation
will proceed anyway when wait_event_interruptible_timeout()
returns for any reason.  Since we do the close no matter what,
we should not return this error code to the caller.  Change
bnxt_close_nic() to a void function and remove all error
handling from some of the callers.

Fixes: c0c050c58d ("bnxt_en: New Broadcom ethernet driver.")
Reviewed-by: Andy Gospodarek <andrew.gospodarek@broadcom.com>
Reviewed-by: Vikas Gupta <vikas.gupta@broadcom.com>
Reviewed-by: Somnath Kotur <somnath.kotur@broadcom.com>
Signed-off-by: Kalesh AP <kalesh-anakkur.purayil@broadcom.com>
Signed-off-by: Michael Chan <michael.chan@broadcom.com>
Link: https://lore.kernel.org/r/20231208001658.14230-4-michael.chan@broadcom.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
This commit is contained in:
Kalesh AP 2023-12-07 16:16:57 -08:00 committed by Jakub Kicinski
parent aded5d1feb
commit bd6781c18c
5 changed files with 16 additions and 34 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

13
drivers/net/ethernet/broadcom/bnxt/bnxt.c
View File

@ -10732,10 +10732,8 @@ static void __bnxt_close_nic(struct bnxt *bp, bool irq_re_init,
bnxt_free_mem(bp, irq_re_init);
}
int bnxt_close_nic(struct bnxt *bp, bool irq_re_init, bool link_re_init)
void bnxt_close_nic(struct bnxt *bp, bool irq_re_init, bool link_re_init)
{
int rc = 0;
if (test_bit(BNXT_STATE_IN_FW_RESET, &bp->state)) {
/* If we get here, it means firmware reset is in progress
* while we are trying to close. We can safely proceed with
@ -10750,15 +10748,18 @@ int bnxt_close_nic(struct bnxt *bp, bool irq_re_init, bool link_re_init)
#ifdef CONFIG_BNXT_SRIOV
if (bp->sriov_cfg) {
int rc;
rc = wait_event_interruptible_timeout(bp->sriov_cfg_wait,
!bp->sriov_cfg,
BNXT_SRIOV_CFG_WAIT_TMO);
if (rc)
netdev_warn(bp->dev, "timeout waiting for SRIOV config operation to complete!\n");
if (!rc)
netdev_warn(bp->dev, "timeout waiting for SRIOV config operation to complete, proceeding to close!\n");
else if (rc < 0)
netdev_warn(bp->dev, "SRIOV config operation interrupted, proceeding to close!\n");
}
#endif
__bnxt_close_nic(bp, irq_re_init, link_re_init);
return rc;
}
static int bnxt_close(struct net_device *dev)

2
drivers/net/ethernet/broadcom/bnxt/bnxt.h
View File

@ -2375,7 +2375,7 @@ int bnxt_open_nic(struct bnxt *, bool, bool);
int bnxt_half_open_nic(struct bnxt *bp);
void bnxt_half_close_nic(struct bnxt *bp);
void bnxt_reenable_sriov(struct bnxt *bp);
int bnxt_close_nic(struct bnxt *, bool, bool);
void bnxt_close_nic(struct bnxt *, bool, bool);
void bnxt_get_ring_err_stats(struct bnxt *bp,
struct bnxt_total_ring_err_stats *stats);
int bnxt_dbg_hwrm_rd_reg(struct bnxt *bp, u32 reg_off, u16 num_words,

11
drivers/net/ethernet/broadcom/bnxt/bnxt_devlink.c
View File

@ -449,15 +449,8 @@ static int bnxt_dl_reload_down(struct devlink *dl, bool netns_change,
return -ENODEV;
}
bnxt_ulp_stop(bp);
if (netif_running(bp->dev)) {
rc = bnxt_close_nic(bp, true, true);
if (rc) {
NL_SET_ERR_MSG_MOD(extack, "Failed to close");
dev_close(bp->dev);
rtnl_unlock();
break;
}
}
if (netif_running(bp->dev))
bnxt_close_nic(bp, true, true);
bnxt_vf_reps_free(bp);
rc = bnxt_hwrm_func_drv_unrgtr(bp);
if (rc) {

19
drivers/net/ethernet/broadcom/bnxt/bnxt_ethtool.c
View File

@ -165,9 +165,8 @@ static int bnxt_set_coalesce(struct net_device *dev,
reset_coalesce:
if (test_bit(BNXT_STATE_OPEN, &bp->state)) {
if (update_stats) {
rc = bnxt_close_nic(bp, true, false);
if (!rc)
rc = bnxt_open_nic(bp, true, false);
bnxt_close_nic(bp, true, false);
rc = bnxt_open_nic(bp, true, false);
} else {
rc = bnxt_hwrm_set_coal(bp);
}
@ -972,12 +971,7 @@ static int bnxt_set_channels(struct net_device *dev,
* before PF unload
*/
}
rc = bnxt_close_nic(bp, true, false);
if (rc) {
netdev_err(bp->dev, "Set channel failure rc :%x\n",
rc);
return rc;
}
bnxt_close_nic(bp, true, false);
}
if (sh) {
@ -4042,12 +4036,7 @@ static void bnxt_self_test(struct net_device *dev, struct ethtool_test *etest,
bnxt_run_fw_tests(bp, test_mask, &test_results);
} else {
bnxt_ulp_stop(bp);
rc = bnxt_close_nic(bp, true, false);
if (rc) {
etest->flags |= ETH_TEST_FL_FAILED;
bnxt_ulp_start(bp, rc);
return;
}
bnxt_close_nic(bp, true, false);
bnxt_run_fw_tests(bp, test_mask, &test_results);
buf[BNXT_MACLPBK_TEST_IDX] = 1;

5
drivers/net/ethernet/broadcom/bnxt/bnxt_ptp.c
View File

@ -521,9 +521,8 @@ static int bnxt_hwrm_ptp_cfg(struct bnxt *bp)
if (netif_running(bp->dev)) {
if (ptp->rx_filter == HWTSTAMP_FILTER_ALL) {
rc = bnxt_close_nic(bp, false, false);
if (!rc)
rc = bnxt_open_nic(bp, false, false);
bnxt_close_nic(bp, false, false);
rc = bnxt_open_nic(bp, false, false);
} else {
bnxt_ptp_cfg_tstamp_filters(bp);
}