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authorGanapathi Bhat <gbhat@marvell.com>2018-05-24 15:48:27 +0200
committerKalle Valo <kvalo@codeaurora.org>2018-05-29 09:22:57 +0200
commitb817047ae70c0bd67b677b65d0d69d72cd6e9728 (patch)
treea526dc62165ef7cd4b4c89e19ce569665d704b4d /mm
parentmwifiex: avoid exporting mwifiex_send_cmd (diff)
downloadlinux-b817047ae70c0bd67b677b65d0d69d72cd6e9728.tar.xz
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mwifiex: handle race during mwifiex_usb_disconnect
Race condition is observed during rmmod of mwifiex_usb: 1. The rmmod thread will call mwifiex_usb_disconnect(), download SHUTDOWN command and do wait_event_interruptible_timeout(), waiting for response. 2. The main thread will handle the response and will do a wake_up_interruptible(), unblocking rmmod thread. 3. On getting unblocked, rmmod thread will make rx_cmd.urb = NULL in mwifiex_usb_free(). 4. The main thread will try to resubmit rx_cmd.urb in mwifiex_usb_submit_rx_urb(), which is NULL. To fix, wait for main thread to complete before calling mwifiex_usb_free(). Signed-off-by: Ganapathi Bhat <gbhat@marvell.com> Signed-off-by: Kalle Valo <kvalo@codeaurora.org>
Diffstat (limited to 'mm')
0 files changed, 0 insertions, 0 deletions