From: Mikulas Patocka <mpatocka@redhat.com>
To: torvalds@linux-foundation.org
Cc: linux-scsi@vger.kernel.org, linux-kernel@vger.kernel.org
Subject: [PATCH 2/4] Add udelay to A100U2W SCSI driver
Date: Tue, 15 Jul 2008 17:16:38 -0400 (EDT) [thread overview]
Message-ID: <Pine.LNX.4.64.0807151716030.4356@devserv.devel.redhat.com> (raw)
In-Reply-To: <Pine.LNX.4.64.0807151011350.24544@devserv.devel.redhat.com>
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 <mpatocka@redhat.com>
---
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 */
next prev parent reply other threads:[~2008-07-15 21:17 UTC|newest]
Thread overview: 10+ messages / expand[flat|nested] mbox.gz Atom feed top
2008-07-15 14:11 [PATCH 1/4] Fix endianity in A100U2W SCSI driver Mikulas Patocka
2008-07-15 14:12 ` [PATCH 2/4] Add udelay to " Mikulas Patocka
2008-07-15 14:14 ` [PATCH 3/4] BUG_ON on kernel misbehavior on A100U2W driver Mikulas Patocka
2008-07-15 14:15 ` [PATCH 4/4] Don't crash on IOMMU overflow in " Mikulas Patocka
2008-07-15 21:19 ` Mikulas Patocka
2008-07-15 15:17 ` [PATCH 3/4] BUG_ON on kernel misbehavior on " James Bottomley
2008-07-15 21:18 ` Mikulas Patocka
2008-07-15 21:16 ` Mikulas Patocka [this message]
2008-07-15 17:23 ` [PATCH 1/4] Fix endianity in A100U2W SCSI driver Linus Torvalds
2008-07-15 21:15 ` Mikulas Patocka
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