From: "Cédric Cano" <ccano@interfaceconcept.com>
To: linuxppc-dev@lists.ozlabs.org
Subject: [PATCH 1/1] Big endian swap for Marvell 6440 SAS driver
Date: Fri, 10 Jun 2011 15:56:30 +0200 [thread overview]
Message-ID: <4DF2228E.7060806@ic.fr> (raw)
Hi,
Marvell SAS driver doesn't work on powerpc architecture due to big
endian swap. I've tested it with the MV6440 chip.
Here you can find the patch for Linux 2.6.39.1.
Cedric Cano
Signed-off-by: Cedric Cano <ccano@interfaceconcept.com>
---
--- drivers/scsi/mvsas/mv_sas.c 2011-06-10 15:50:04.000000000 +0200
+++ drivers/scsi/mvsas/mv_sas.c 2011-06-10 15:50:12.000000000 +0200
@@ -1143,6 +1143,14 @@
MVS_CHIP_DISP->write_port_cfg_addr(mvi, i, PHYR_SATA_SIG0);
s[0] = MVS_CHIP_DISP->read_port_cfg_data(mvi, i);
+ /* swap for big endian devices because of use of these data in bytes */
+#ifdef __BIG_ENDIAN
+ s[0] = swab32(s[0]);
+ s[1] = swab32(s[1]);
+ s[2] = swab32(s[2]);
+ s[3] = swab32(s[3]);
+#endif /* __BIG_ENDIAN */
+
/* Workaround: take some ATAPI devices for ATA */
if (((s[1] & 0x00FFFFFF) == 0x00EB1401) && (*(u8 *)&s[3] == 0x01))
s[1] = 0x00EB1401 | (*((u8 *)&s[1] + 3) & 0x10);
---
next reply other threads:[~2011-06-10 17:51 UTC|newest]
Thread overview: 4+ messages / expand[flat|nested] mbox.gz Atom feed top
2011-06-10 13:56 Cédric Cano [this message]
2011-06-11 22:45 ` [PATCH 1/1] Big endian swap for Marvell 6440 SAS driver Benjamin Herrenschmidt
2011-06-14 6:42 ` Cédric Cano
2011-06-14 7:05 ` Benjamin Herrenschmidt
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