Subject: [PATCH 1/1] Big endian swap for Marvell 6440 SAS driver

From: Cédric Cano <[email-masked]>
Date: Fri, 10 Jun 2011 15:56:30 +0200

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 <[email-masked]>
---
--- 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);

---