diff options
| author | Amitkumar Karwar | 2016-07-15 19:07:04 +0530 |
|---|---|---|
| committer | Kalle Valo | 2016-07-18 22:42:56 +0300 |
| commit | 514952889544fcb069bbedfec4aa624fc9e26c4b (patch) | |
| tree | cb06cc9a8cd727d7954c79385ffe228f1790050a /drivers/net/wireless | |
| parent | 2af86f9d954ee86e9b1c492e025de37a1b6d2db8 (diff) | |
mwifiex: fix PCIe legacy interrupt problem
In corner case, we may end up processing same interrupt twice.
We have a logic to read pending interrupts at the end of interrupt
processing routine. It has a race with interrupts read in interrupt
handler. This patch solves the problem by ORing the interrupt bitmap
in this case.
The symptom for this bug is below messages in dmesg log.
[ 11.522123] mwifiex_pcie 0000:01:00.0: CMD_RESP: invalid cmd resp
[ 11.680412] mwifiex_pcie 0000:01:00.0: There is no command but got cmdrsp
Link: https://bugzilla.kernel.org/show_bug.cgi?id=109681
Signed-off-by: Amitkumar Karwar <akarwar@marvell.com>
Signed-off-by: Cathy Luo <cluo@marvell.com>
Signed-off-by: Kalle Valo <kvalo@codeaurora.org>
Diffstat (limited to 'drivers/net/wireless')
| -rw-r--r-- | drivers/net/wireless/marvell/mwifiex/pcie.c | 6 |
1 files changed, 6 insertions, 0 deletions
diff --git a/drivers/net/wireless/marvell/mwifiex/pcie.c b/drivers/net/wireless/marvell/mwifiex/pcie.c index 0faf4a2c006e..12d0ee15df1f 100644 --- a/drivers/net/wireless/marvell/mwifiex/pcie.c +++ b/drivers/net/wireless/marvell/mwifiex/pcie.c @@ -2300,6 +2300,12 @@ static int mwifiex_process_pcie_int(struct mwifiex_adapter *adapter) } } + if (!card->msi_enable) { + spin_lock_irqsave(&adapter->int_lock, flags); + pcie_ireg |= adapter->int_status; + adapter->int_status = 0; + spin_unlock_irqrestore(&adapter->int_lock, flags); + } } mwifiex_dbg(adapter, INTR, "info: cmd_sent=%d data_sent=%d\n", |