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| author | Chanho Min <chanho0207@gmail.com> | 2012-02-20 02:24:40 +0100 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2012-02-24 22:50:47 +0100 |
| commit | 6dc01aa65306fe46b7ba38db51fad4ed81c23d00 (patch) | |
| tree | cad255d51a09c900062d9dbd2db07432dc4b5b19 /drivers/tty/pty.c | |
| parent | serial: samsung: fix s3c2442 platform data (diff) | |
| download | linux-6dc01aa65306fe46b7ba38db51fad4ed81c23d00.tar.xz linux-6dc01aa65306fe46b7ba38db51fad4ed81c23d00.zip | |
amba-pl011/dma: Add check for the residue in DMA callback
In DMA-operated uart, I found that rx data can be taken by the UART
interrupts during the DMA irq handler. pl011_int is occurred just
before it goes inside spin_lock_irq. When it returns to the callback,
DMA buffer already has been flushed. Then, pl011_dma_rx_chars gets
invalid data. So I add check for the residue as the patch bellow.
Signed-off-by: Chanho Min <chanho.min@lge.com>
Acked-by: Linus Walleij <linus.walleij@linaro.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'drivers/tty/pty.c')
0 files changed, 0 insertions, 0 deletions