4.9-stable review patch. If anyone has any objections, please let me know.
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From: Amitkumar Karwar akarwar@marvell.com
[ Upstream commit 74c8719b8ee0922593a5cbec0bd6127d86d8a2f4 ]
If we have sdio work requests received when sdio card reset is happening, we may end up accessing older save_adapter pointer later which is already freed during card reset. This patch solves the problem by cancelling those pending requests.
Signed-off-by: Amitkumar Karwar akarwar@marvell.com Signed-off-by: Kalle Valo kvalo@codeaurora.org Signed-off-by: Sasha Levin alexander.levin@verizon.com Signed-off-by: Greg Kroah-Hartman gregkh@linuxfoundation.org --- drivers/net/wireless/marvell/mwifiex/sdio.c | 6 ++++++ 1 file changed, 6 insertions(+)
--- a/drivers/net/wireless/marvell/mwifiex/sdio.c +++ b/drivers/net/wireless/marvell/mwifiex/sdio.c @@ -2296,6 +2296,12 @@ static void mwifiex_recreate_adapter(str mmc_hw_reset(func->card->host); sdio_release_host(func);
+ /* Previous save_adapter won't be valid after this. We will cancel + * pending work requests. + */ + clear_bit(MWIFIEX_IFACE_WORK_DEVICE_DUMP, &iface_work_flags); + clear_bit(MWIFIEX_IFACE_WORK_CARD_RESET, &iface_work_flags); + mwifiex_sdio_probe(func, device_id); }