kernel-fxtec-pro1x/drivers/net/wimax
Cindy H Kao 5b45bfe501 wimax/i2400m: fix the bootmode RX deadlock in SDIO driver
i2400ms_bus_bm_wait_for_ack() causes a race condition. It happens
because this function clears i2400ms->bm_ack_size before waiting for
an interrupt, which is set by the interrupt service routine i2400ms_rx()
to indicate reception and size of received data; thus, if the interrupt
came right before the clearing/waiting, it is lost.

The fix is clear the bm_ack_size to -EINPROGRESS before we are enabling
the RX interrupt configuration in i2400ms_rx_setup(). Then everytime
when the interrupt service routine i2400ms_rx() is invoked during bootmode,
bm_ack_size is updated with the actual rx_size and it is cleared to
-EINPROGRESS again after the RX data is handled.

Signed-off-by: Cindy H Kao <cindy.h.kao@intel.com>
Signed-off-by: Inaky Perez-Gonzalez <inaky@linux.intel.com>
2009-10-19 15:55:33 +09:00
..
i2400m wimax/i2400m: fix the bootmode RX deadlock in SDIO driver 2009-10-19 15:55:33 +09:00
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