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Merge branch 'qlcnic-next' 

Rajesh Borundia says:

====================
qlcnic fixes

This series adds following fixes.

o While processing mailbox if driver gets a spurious mailbox
  interrupt it leads into premature completion of a next
  mailbox request. Added a guard against this by checking current
  state of mailbox and ignored spurious interrupt.
  Added a stats counter to record this condition.

v2:

o Added patch that removes usage of atomic_t as we are not implemeting
  atomicity by using atomic_t value.
====================

Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
David S. Miller 2016-03-10 16:15:54 -05:00
parent b795a213a4 819bfe764d
commit e49038d6ee
3 changed files with 19 additions and 11 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

3
drivers/net/ethernet/qlogic/qlcnic/qlcnic.h
View File

@ -566,6 +566,7 @@ struct qlcnic_adapter_stats {
u64 tx_dma_map_error;
u64 spurious_intr;
u64 mac_filter_limit_overrun;
u64 mbx_spurious_intr;
};
/*
@ -1099,7 +1100,7 @@ struct qlcnic_mailbox {
unsigned long status;
spinlock_t queue_lock; /* Mailbox queue lock */
spinlock_t aen_lock; /* Mailbox response/AEN lock */
atomic_t rsp_status;
u32 rsp_status;
u32 num_cmds;
};

22
drivers/net/ethernet/qlogic/qlcnic/qlcnic_83xx_hw.c
View File

@ -491,7 +491,7 @@ irqreturn_t qlcnic_83xx_clear_legacy_intr(struct qlcnic_adapter *adapter)
static inline void qlcnic_83xx_notify_mbx_response(struct qlcnic_mailbox *mbx)
{
atomic_set(&mbx->rsp_status, QLC_83XX_MBX_RESPONSE_ARRIVED);
mbx->rsp_status = QLC_83XX_MBX_RESPONSE_ARRIVED;
complete(&mbx->completion);
}
@ -510,7 +510,7 @@ static void qlcnic_83xx_poll_process_aen(struct qlcnic_adapter *adapter)
if (event & QLCNIC_MBX_ASYNC_EVENT) {
__qlcnic_83xx_process_aen(adapter);
} else {
if (atomic_read(&mbx->rsp_status) != rsp_status)
if (mbx->rsp_status != rsp_status)
qlcnic_83xx_notify_mbx_response(mbx);
}
out:
@ -1023,7 +1023,7 @@ static void qlcnic_83xx_process_aen(struct qlcnic_adapter *adapter)
if (event & QLCNIC_MBX_ASYNC_EVENT) {
__qlcnic_83xx_process_aen(adapter);
} else {
if (atomic_read(&mbx->rsp_status) != rsp_status)
if (mbx->rsp_status != rsp_status)
qlcnic_83xx_notify_mbx_response(mbx);
}
}
@ -2338,9 +2338,9 @@ static void qlcnic_83xx_handle_link_aen(struct qlcnic_adapter *adapter,
static irqreturn_t qlcnic_83xx_handle_aen(int irq, void *data)
{
u32 mask, resp, event, rsp_status = QLC_83XX_MBX_RESPONSE_ARRIVED;
struct qlcnic_adapter *adapter = data;
struct qlcnic_mailbox *mbx;
u32 mask, resp, event;
unsigned long flags;
mbx = adapter->ahw->mailbox;
@ -2350,10 +2350,14 @@ static irqreturn_t qlcnic_83xx_handle_aen(int irq, void *data)
goto out;
event = readl(QLCNIC_MBX_FW(adapter->ahw, 0));
if (event & QLCNIC_MBX_ASYNC_EVENT)
if (event & QLCNIC_MBX_ASYNC_EVENT) {
__qlcnic_83xx_process_aen(adapter);
else
} else {
if (mbx->rsp_status != rsp_status)
qlcnic_83xx_notify_mbx_response(mbx);
else
adapter->stats.mbx_spurious_intr++;
}
out:
mask = QLCRDX(adapter->ahw, QLCNIC_DEF_INT_MASK);
@ -4050,10 +4054,10 @@ static void qlcnic_83xx_mailbox_worker(struct work_struct *work)
struct qlcnic_adapter *adapter = mbx->adapter;
const struct qlcnic_mbx_ops *mbx_ops = mbx->ops;
struct device *dev = &adapter->pdev->dev;
atomic_t *rsp_status = &mbx->rsp_status;
struct list_head *head = &mbx->cmd_q;
struct qlcnic_hardware_context *ahw;
struct qlcnic_cmd_args *cmd = NULL;
unsigned long flags;
ahw = adapter->ahw;
@ -4063,7 +4067,9 @@ static void qlcnic_83xx_mailbox_worker(struct work_struct *work)
return;
}
atomic_set(rsp_status, QLC_83XX_MBX_RESPONSE_WAIT);
spin_lock_irqsave(&mbx->aen_lock, flags);
mbx->rsp_status = QLC_83XX_MBX_RESPONSE_WAIT;
spin_unlock_irqrestore(&mbx->aen_lock, flags);
spin_lock(&mbx->queue_lock);

3
drivers/net/ethernet/qlogic/qlcnic/qlcnic_ethtool.c
View File

@ -59,7 +59,8 @@ static const struct qlcnic_stats qlcnic_gstrings_stats[] = {
QLC_OFF(stats.mac_filter_limit_overrun)},
{"spurious intr", QLC_SIZEOF(stats.spurious_intr),
QLC_OFF(stats.spurious_intr)},
{"mbx spurious intr", QLC_SIZEOF(stats.mbx_spurious_intr),
QLC_OFF(stats.mbx_spurious_intr)},
};
static const char qlcnic_device_gstrings_stats[][ETH_GSTRING_LEN] = {