Hello, This patch set fixes bug causing serial hang in DMA mode for FIFO sizes smaller than cache alignment. The first patch fixes DMA mode entering condition to avoid starting with buffer smaller than cache line size. Second patch fixes the serial hang bug, which was caused by unproper buffer aligning algorithm which assumed that there is always enough free space in FIFO for excessive bytes of buffer that is being alligned.
Best regards, Robert Baldyga Changelog: v2: - Add CC to stable - Add Reported-by: Krzysztof Kozlowski - Change title of the first patch to more relevant v1: http://permalink.gmane.org/gmane.linux.kernel/2008281 Marek Szyprowski (1): serial: samsung: fix DMA mode enter condition for small FIFO sizes Robert Baldyga (1): serial: samsung: fix DMA for FIFO smaller than cache line size drivers/tty/serial/samsung.c | 47 +++++++++++++++++++++++++++++--------------- drivers/tty/serial/samsung.h | 1 + 2 files changed, 32 insertions(+), 16 deletions(-) -- 1.9.1 -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to [email protected] More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
