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| author | Ilpo Järvinen <[email protected]> | 2022-11-08 14:19:52 +0200 |
|---|---|---|
| committer | Greg Kroah-Hartman <[email protected]> | 2022-11-09 13:04:39 +0100 |
| commit | 1980860e0c8299316cddaf0992dd9e1258ec9d88 (patch) | |
| tree | 8b06ac866386b579930ef260ef2c3229fa3bd012 /lib/mpi/mpi-sub-ui.c | |
| parent | 7090abd6ad0610a144523ce4ffcb8560909bf2a8 (diff) | |
serial: 8250: Flush DMA Rx on RLSI
Returning true from handle_rx_dma() without flushing DMA first creates
a data ordering hazard. If DMA Rx has handled any character at the
point when RLSI occurs, the non-DMA path handles any pending characters
jumping them ahead of those characters that are pending under DMA.
Fixes: 75df022b5f89 ("serial: 8250_dma: Fix RX handling")
Cc: <[email protected]>
Signed-off-by: Ilpo Järvinen <[email protected]>
Reviewed-by: Andy Shevchenko <[email protected]>
Link: https://lore.kernel.org/r/[email protected]
Signed-off-by: Greg Kroah-Hartman <[email protected]>
Diffstat (limited to 'lib/mpi/mpi-sub-ui.c')
0 files changed, 0 insertions, 0 deletions