From 02507a80b35edd720480540d917e9f92cc371009 Mon Sep 17 00:00:00 2001 From: Finn Thain Date: Sat, 5 Dec 2009 12:30:42 +1100 Subject: [SCSI] mac_esp: fix PIO mode, take 2 The mac_esp PIO algorithm no longer works in 2.6.31 and crashes my Centris 660av. So here's a better one. Also, force async with esp_set_offset() rather than esp_slave_configure(). One of the SCSI drives I tested still doesn't like the PIO mode and fails with "esp: esp0: Reconnect IRQ2 timeout" (the same drive works fine in PDMA mode). This failure happens when esp_reconnect_with_tag() tries to read in two tag bytes but the chip only provides one (0x20). I don't know what causes this. I decided not to waste any more time trying to fix it because the best solution is to rip out the PIO mode altogether and use the DMA engine. Signed-off-by: Finn Thain Signed-off-by: James Bottomley --- drivers/scsi/esp_scsi.c | 14 ++++---------- 1 file changed, 4 insertions(+), 10 deletions(-) (limited to 'drivers/scsi/esp_scsi.c') diff --git a/drivers/scsi/esp_scsi.c b/drivers/scsi/esp_scsi.c index a680e18b5f3b..e2bc779f86c1 100644 --- a/drivers/scsi/esp_scsi.c +++ b/drivers/scsi/esp_scsi.c @@ -1449,9 +1449,6 @@ static void esp_msgin_sdtr(struct esp *esp, struct esp_target_data *tp) if (offset > 15) goto do_reject; - if (esp->flags & ESP_FLAG_DISABLE_SYNC) - offset = 0; - if (offset) { int one_clock; @@ -2405,12 +2402,6 @@ static int esp_slave_configure(struct scsi_device *dev) struct esp_target_data *tp = &esp->target[dev->id]; int goal_tags, queue_depth; - if (esp->flags & ESP_FLAG_DISABLE_SYNC) { - /* Bypass async domain validation */ - dev->ppr = 0; - dev->sdtr = 0; - } - goal_tags = 0; if (dev->tagged_supported) { @@ -2660,7 +2651,10 @@ static void esp_set_offset(struct scsi_target *target, int offset) struct esp *esp = shost_priv(host); struct esp_target_data *tp = &esp->target[target->id]; - tp->nego_goal_offset = offset; + if (esp->flags & ESP_FLAG_DISABLE_SYNC) + tp->nego_goal_offset = 0; + else + tp->nego_goal_offset = offset; tp->flags |= ESP_TGT_CHECK_NEGO; } -- cgit v1.2.3