From mboxrd@z Thu Jan 1 00:00:00 1970 From: Paul Gortmaker Subject: Re: [PATCH 3/3] 8250: add workaround for MPC8[356]xx UART break IRQ storm Date: Thu, 1 Dec 2011 19:05:06 -0500 Message-ID: <4ED81632.3030809@windriver.com> References: <1322783258-20443-1-git-send-email-paul.gortmaker@windriver.com> <1322783258-20443-4-git-send-email-paul.gortmaker@windriver.com> <4ED812E4.60905@freescale.com> Mime-Version: 1.0 Content-Type: text/plain; charset="UTF-8" Content-Transfer-Encoding: 7bit Return-path: In-Reply-To: <4ED812E4.60905@freescale.com> Sender: linux-kernel-owner@vger.kernel.org To: Scott Wood Cc: gregkh@suse.de, alan@linux.intel.com, galak@kernel.crashing.org, linux-serial@vger.kernel.org, linuxppc-dev@lists.ozlabs.org, linux-kernel@vger.kernel.org List-Id: linux-serial@vger.kernel.org On 11-12-01 06:51 PM, Scott Wood wrote: > 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. OK, I'll simply change the above to CONFIG_PPC then. Thanks, Paul. > > -Scott >