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authorLinus Torvalds <torvalds@linux-foundation.org>2009-02-17 14:16:02 -0800
committerLinus Torvalds <torvalds@linux-foundation.org>2009-02-17 14:16:02 -0800
commit0637810f24bad641d3d3f80fd3f63f3baffd9536 (patch)
tree13ff343e916e925deed298ca4abd1a73fd95c50b /drivers
parent51f267739a81db5eb511b95aeae338413690b8a2 (diff)
parent7dac745b8e367c99175b8f0d014d996f0e5ed9e5 (diff)
Merge branch 'upstream-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jgarzik/libata-dev
* 'upstream-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jgarzik/libata-dev: sata_nv: give up hardreset on nf2 libata-sff: fix 32-bit PIO ATAPI regression
Diffstat (limited to 'drivers')
-rw-r--r--drivers/ata/libata-sff.c28
-rw-r--r--drivers/ata/sata_nv.c14
2 files changed, 29 insertions, 13 deletions
diff --git a/drivers/ata/libata-sff.c b/drivers/ata/libata-sff.c
index 0b299b0f817..714cb046b59 100644
--- a/drivers/ata/libata-sff.c
+++ b/drivers/ata/libata-sff.c
@@ -773,18 +773,32 @@ unsigned int ata_sff_data_xfer32(struct ata_device *dev, unsigned char *buf,
else
iowrite32_rep(data_addr, buf, words);
+ /* Transfer trailing bytes, if any */
if (unlikely(slop)) {
- __le32 pad;
+ unsigned char pad[4];
+
+ /* Point buf to the tail of buffer */
+ buf += buflen - slop;
+
+ /*
+ * Use io*_rep() accessors here as well to avoid pointlessly
+ * swapping bytes to and fro on the big endian machines...
+ */
if (rw == READ) {
- pad = cpu_to_le32(ioread32(ap->ioaddr.data_addr));
- memcpy(buf + buflen - slop, &pad, slop);
+ if (slop < 3)
+ ioread16_rep(data_addr, pad, 1);
+ else
+ ioread32_rep(data_addr, pad, 1);
+ memcpy(buf, pad, slop);
} else {
- memcpy(&pad, buf + buflen - slop, slop);
- iowrite32(le32_to_cpu(pad), ap->ioaddr.data_addr);
+ memcpy(pad, buf, slop);
+ if (slop < 3)
+ iowrite16_rep(data_addr, pad, 1);
+ else
+ iowrite32_rep(data_addr, pad, 1);
}
- words++;
}
- return words << 2;
+ return (buflen + 1) & ~1;
}
EXPORT_SYMBOL_GPL(ata_sff_data_xfer32);
diff --git a/drivers/ata/sata_nv.c b/drivers/ata/sata_nv.c
index 444af0415ca..55a8eed3f3a 100644
--- a/drivers/ata/sata_nv.c
+++ b/drivers/ata/sata_nv.c
@@ -421,19 +421,21 @@ static struct ata_port_operations nv_generic_ops = {
.hardreset = ATA_OP_NULL,
};
-/* OSDL bz3352 reports that nf2/3 controllers can't determine device
- * signature reliably. Also, the following thread reports detection
- * failure on cold boot with the standard debouncing timing.
+/* nf2 is ripe with hardreset related problems.
+ *
+ * kernel bz#3352 reports nf2/3 controllers can't determine device
+ * signature reliably. The following thread reports detection failure
+ * on cold boot with the standard debouncing timing.
*
* http://thread.gmane.org/gmane.linux.ide/34098
*
- * Debounce with hotplug timing and request follow-up SRST.
+ * And bz#12176 reports that hardreset simply doesn't work on nf2.
+ * Give up on it and just don't do hardreset.
*/
static struct ata_port_operations nv_nf2_ops = {
- .inherits = &nv_common_ops,
+ .inherits = &nv_generic_ops,
.freeze = nv_nf2_freeze,
.thaw = nv_nf2_thaw,
- .hardreset = nv_noclassify_hardreset,
};
/* For initial probing after boot and hot plugging, hardreset mostly