diff options
| author | Amitkumar Karwar <akarwar@marvell.com> | 2013-09-27 10:55:38 -0700 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2013-11-13 12:08:07 +0900 |
| commit | ecaa9a5393c6efea168c0092058a44e67c6ffa23 (patch) | |
| tree | 6956c7d63674110891f5e6a0ae3fc74ba76580cc /drivers | |
| parent | 3ace6195f05329e8c1e18b4a45c2f605ac922042 (diff) | |
mwifiex: fix SDIO interrupt lost issue
commit 453b0c3f6910672f79da354077af728d92f95c5b upstream.
601216e "mwifiex: process RX packets in SDIO IRQ thread directly"
introduced a command timeout issue which can be reproduced easily on
an AM33xx platform using a test application written by Daniel Mack:
https://gist.github.com/zonque/6579314
mwifiex_main_process() is called from both the SDIO handler and
the workqueue. In case an interrupt occurs right after the
int_status check, but before updating the mwifiex_processing flag,
this interrupt gets lost, resulting in a command timeout and
consequently a card reset.
Let main_proc_lock protect both int_status and mwifiex_processing
flag. This fixes the interrupt lost issue.
Reported-by: Sven Neumann <s.neumann@raumfeld.com>
Reported-by: Andreas Fenkart <andreas.fenkart@streamunlimited.com>
Tested-by: Daniel Mack <zonque@gmail.com>
Reviewed-by: Dylan Reid <dgreid@chromium.org>
Signed-off-by: Amitkumar Karwar <akarwar@marvell.com>
Signed-off-by: Bing Zhao <bzhao@marvell.com>
Signed-off-by: Paul Stewart <pstew@chromium.org>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'drivers')
| -rw-r--r-- | drivers/net/wireless/mwifiex/main.c | 6 |
1 files changed, 4 insertions, 2 deletions
diff --git a/drivers/net/wireless/mwifiex/main.c b/drivers/net/wireless/mwifiex/main.c index 108267d4e08c..02cc93b673c1 100644 --- a/drivers/net/wireless/mwifiex/main.c +++ b/drivers/net/wireless/mwifiex/main.c @@ -354,10 +354,12 @@ process_start: } } while (true); - if ((adapter->int_status) || IS_CARD_RX_RCVD(adapter)) + spin_lock_irqsave(&adapter->main_proc_lock, flags); + if ((adapter->int_status) || IS_CARD_RX_RCVD(adapter)) { + spin_unlock_irqrestore(&adapter->main_proc_lock, flags); goto process_start; + } - spin_lock_irqsave(&adapter->main_proc_lock, flags); adapter->mwifiex_processing = false; spin_unlock_irqrestore(&adapter->main_proc_lock, flags); |