The following is CUMULATIVE to the previous push, but in the same linear
history. IOW, pulling 'linus-plus-plus' also gets you 'upstream-linus'.
But if you have already pulled 'upstream-linus', you will only receive
these two changesets.
Please pull from branch 'linus-plus-plus' of
master.kernel.org:/pub/scm/linux/kernel/git/jgarzik/libata-dev.git linus-plus-plus
to receive the following changes:
drivers/ata/libata-core.c | 33 ++++++++++++++++++++-------------
1 files changed, 20 insertions(+), 13 deletions(-)
Tejun Heo (2):
libata: force PIO on IOMEGA ZIP 250 ATAPI
libata: limit post SRST nsect/lbal wait to ~100ms
diff --git a/drivers/ata/libata-core.c b/drivers/ata/libata-core.c
index 4b3c45e..047eabd 100644
--- a/drivers/ata/libata-core.c
+++ b/drivers/ata/libata-core.c
@@ -3061,22 +3061,28 @@ static int ata_bus_post_reset(struct ata_port *ap, unsigned int devmask,
}
}
- /* if device 1 was found in ata_devchk, wait for
- * register access, then wait for BSY to clear
+ /* if device 1 was found in ata_devchk, wait for register
+ * access briefly, then wait for BSY to clear.
*/
- while (dev1) {
- u8 nsect, lbal;
+ if (dev1) {
+ int i;
ap->ops->dev_select(ap, 1);
- nsect = ioread8(ioaddr->nsect_addr);
- lbal = ioread8(ioaddr->lbal_addr);
- if ((nsect == 1) && (lbal == 1))
- break;
- if (time_after(jiffies, deadline))
- return -EBUSY;
- msleep(50); /* give drive a breather */
- }
- if (dev1) {
+
+ /* Wait for register access. Some ATAPI devices fail
+ * to set nsect/lbal after reset, so don't waste too
+ * much time on it. We're gonna wait for !BSY anyway.
+ */
+ for (i = 0; i < 2; i++) {
+ u8 nsect, lbal;
+
+ nsect = ioread8(ioaddr->nsect_addr);
+ lbal = ioread8(ioaddr->lbal_addr);
+ if ((nsect == 1) && (lbal == 1))
+ break;
+ msleep(50); /* give drive a breather */
+ }
+
rc = ata_wait_ready(ap, deadline);
if (rc) {
if (rc != -ENODEV)
@@ -3771,6 +3777,7 @@ static const struct ata_blacklist_entry ata_device_blacklist [] = {
{ "_NEC DV5800A", NULL, ATA_HORKAGE_NODMA },
{ "SAMSUNG CD-ROM SN-124","N001", ATA_HORKAGE_NODMA },
{ "Seagate STT20000A", NULL, ATA_HORKAGE_NODMA },
+ { "IOMEGA ZIP 250 ATAPI", NULL, ATA_HORKAGE_NODMA }, /* temporary fix */
/* Weird ATAPI devices */
{ "TORiSAN DVD-ROM DRD-N216", NULL, ATA_HORKAGE_MAX_SEC_128 |
-
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