From mboxrd@z Thu Jan 1 00:00:00 1970 From: Mikulas Patocka Subject: [PATCH 2/4] Add udelay to A100U2W SCSI driver Date: Tue, 15 Jul 2008 17:16:38 -0400 (EDT) Message-ID: References: Mime-Version: 1.0 Content-Type: TEXT/PLAIN; charset=US-ASCII Return-path: Received: from mx1.redhat.com ([66.187.233.31]:42053 "EHLO mx1.redhat.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1756791AbYGOVRL (ORCPT ); Tue, 15 Jul 2008 17:17:11 -0400 In-Reply-To: Sender: linux-scsi-owner@vger.kernel.org List-Id: linux-scsi@vger.kernel.org To: torvalds@linux-foundation.org Cc: linux-scsi@vger.kernel.org, linux-kernel@vger.kernel.org udelay is required on Sun Ultra 5. I don't know any reason or explanation for this, it was found purely experimentally. Signed-off-by: Mikulas Patocka --- drivers/scsi/a100u2w.c | 1 + 1 file changed, 1 insertion(+) Index: linux-2.6.26-rc8/drivers/scsi/a100u2w.c =================================================================== --- linux-2.6.26-rc8.orig/drivers/scsi/a100u2w.c 2008-07-01 18:48:09.000000000 +0200 +++ linux-2.6.26-rc8/drivers/scsi/a100u2w.c 2008-07-01 18:48:11.000000000 +0200 @@ -401,6 +401,7 @@ static u8 orc_load_firmware(struct orc_h /* Copy the code from the BIOS to the SRAM */ + udelay(500); /* Required on Sun Ultra 5 ... 350 -> failures */ bios_addr = (u16) le32_to_cpu(data32); /* FW code locate at BIOS address + ? */ for (i = 0, data32_ptr = (u8 *) & data32; /* Download the code */ i < 0x1000; /* Firmware code size = 4K */