Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/roland...

[linux-2.6] / drivers / infiniband / hw / ipath / ipath_diag.c

diff --git a/drivers/infiniband/hw/ipath/ipath_diag.c b/drivers/infiniband/hw/ipath/ipath_diag.c
index a698f1949d1040da508c1c727acca8bf6bb24dbb..4137c7770f1bce083d7342508005c9497e5a91cd 100644 (file)
--- a/drivers/infiniband/hw/ipath/ipath_diag.c
+++ b/drivers/infiniband/hw/ipath/ipath_diag.c
@@ -44,6 +44,7 @@
 #include <linux/io.h>
 #include <linux/pci.h>
 #include <linux/vmalloc.h>
+#include <linux/fs.h>
 #include <asm/uaccess.h>
 
 #include "ipath_kernel.h"
@@ -445,19 +446,21 @@ static ssize_t ipath_diagpkt_write(struct file *fp,
                           dd->ipath_unit, plen - 1, pbufn);
 
        if (dp.pbc_wd == 0)
-               /* Legacy operation, use computed pbc_wd */
                dp.pbc_wd = plen;
-
-       /* we have to flush after the PBC for correctness on some cpus
-        * or WC buffer can be written out of order */
        writeq(dp.pbc_wd, piobuf);
-       ipath_flush_wc();
-       /* copy all by the trigger word, then flush, so it's written
+       /*
+        * Copy all by the trigger word, then flush, so it's written
         * to chip before trigger word, then write trigger word, then
-        * flush again, so packet is sent. */
-       __iowrite32_copy(piobuf + 2, tmpbuf, clen - 1);
-       ipath_flush_wc();
-       __raw_writel(tmpbuf[clen - 1], piobuf + clen + 1);
+        * flush again, so packet is sent.
+        */
+       if (dd->ipath_flags & IPATH_PIO_FLUSH_WC) {
+               ipath_flush_wc();
+               __iowrite32_copy(piobuf + 2, tmpbuf, clen - 1);
+               ipath_flush_wc();
+               __raw_writel(tmpbuf[clen - 1], piobuf + clen + 1);
+       } else
+               __iowrite32_copy(piobuf + 2, tmpbuf, clen);
+
        ipath_flush_wc();
 
        ret = sizeof(dp);