Re: [PATCH 3/3] 8250: add workaround for MPC8[356]xx UART break IRQ storm
From: Scott Wood <hidden>
Date: 2011-12-01 23:51:12
Also in:
linux-serial, lkml
On 12/01/2011 05:47 PM, Paul Gortmaker wrote:
quoted hunk ↗ jump to hunk
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