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    [PATCH] bttv: fix dst i2c read/write timeout failure. · fc9d53af
    Manu Abraham 提交于
    Attached is a patch to bttv which fixes the following problems.
    
    Affected cards and problems:
    ~~~~~~~~~~~~~~~~~~~~~~~~
    o VP-1020 (200103A) Tuning problems, device detection.
    o VP-1020 (DST-MOT) Errors during tuning, device detection fails in a while.
    o VP-1030 (DST-CI) Tuning sometimes fails after CI commands.
    o VP-2031 (DCT-CI) Tuning problems
    
    The timeout happens before the actual timeout occured in the MCU
    on the board, and hence the problems.
    
    Changes: (bttv-i2c.diff)
    ~~~~~~~~~~~~~~~~~~~~~~~~
    o Changed the custom wait queue to wait_event_interruptible_timeout()
          - Suggestion by Johannes Stezenbach.
    
    o Fixed the wait queue timeout problem
          - This fixes the timeout problem on various cards.
          - This problem was visible as many
              * Cannot tune to channels, when signal levels are very low.
              * app_info does not work in some conditions for CI based cards
          - Smaller values worked good for newer cards, but the older cards
    suffered, settled down to the worst case values that could happen in any
    eventuality.
    Signed-off-by: NManu Abraham <manu@kromtek.com>
    Signed-off-by: NAndrew Morton <akpm@osdl.org>
    Signed-off-by: NLinus Torvalds <torvalds@osdl.org>
    fc9d53af
bttv-i2c.c 11.2 KB