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SubjectRe: [PATCH 3/3] 8250: add workaround for MPC8[356]xx UART break IRQ storm
On 12/01/2011 05:47 PM, Paul Gortmaker wrote:
> diff --git a/include/linux/serial_8250.h b/include/linux/serial_8250.h
> index 8c660af..b0f4042 100644
> --- a/include/linux/serial_8250.h
> +++ b/include/linux/serial_8250.h
> @@ -18,6 +18,11 @@
> #define UART_BUG_TXEN (1 << 1) /* buggy TX IIR status */
> #define UART_BUG_NOMSR (1 << 2) /* buggy MSR status bits (Au1x00) */
> #define UART_BUG_THRE (1 << 3) /* buggy THRE reassertion */
> +#ifdef CONFIG_PPC32
> +#define UART_BUG_FSLBK (1 << 4) /* buggy FSL break IRQ storm */
> +#else /* help GCC optimize away IRQ handler errata code for ARCH != PPC32 */
> +#define UART_BUG_FSLBK 0
> +#endif

I believe this bug still exists on our 64-bit chips.

-Scott



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