This effects all U320 LSI Logic controllers, such as 53C1030
(not megaraid).
If there is any error recovery that results in a host reset,
all the devices will end up at the slowest possible speed,
e.g. asyn narrow.
To reproduce, you will need a 2.6.17-rc series kernel, and do
# hdparm -t /dev/sda (notice the seq. read transfer rate)
# sg_reset -h /dev/sg0
# hdparm -t /dev/sda (notice the transfer rate drop to about 2 MB/s).
What this patch does is kick of domain validation after host reset, so
all device renogiate at their best rates. The host reset had placed \
all devices at defaults settings, which is asyn narrow.
This issue was only introduced since release of 2.6.16 kernel.
This is urgent bug fix for 2.6.17-rc4.
Signed-off-by: Eric Moore <Eric.Moore@xxxxxxxx>
diff -uarN b/drivers/message/fusion/mptspi.c a/drivers/message/fusion/mptspi.c
--- b/drivers/message/fusion/mptspi.c 2006-04-21 10:47:41.000000000 -0600
+++ a/drivers/message/fusion/mptspi.c 2006-04-21 10:53:25.000000000 -0600
@@ -783,6 +783,70 @@
};
MODULE_DEVICE_TABLE(pci, mptspi_pci_table);
+
+/*
+ * renegotiate for a given target
+ */
+static void
+mptspi_dv_renegotiate_work(void *data)
+{
+ struct work_queue_wrapper *wqw = (struct work_queue_wrapper *)data;
+ struct _MPT_SCSI_HOST *hd = wqw->hd;
+ struct scsi_device *sdev;
+
+ kfree(wqw);
+
+ shost_for_each_device(sdev, hd->ioc->sh)
+ mptspi_dv_device(hd, sdev);
+}
+
+static void
+mptspi_dv_renegotiate(struct _MPT_SCSI_HOST *hd)
+{
+ struct work_queue_wrapper *wqw = kmalloc(sizeof(*wqw), GFP_ATOMIC);
+
+ if (!wqw)
+ return;
+
+ INIT_WORK(&wqw->work, mptspi_dv_renegotiate_work, wqw);
+ wqw->hd = hd;
+
+ schedule_work(&wqw->work);
+}
+
+/*
+ * spi module reset handler
+ */
+static int
+mptspi_ioc_reset(MPT_ADAPTER *ioc, int reset_phase)
+{
+ struct _MPT_SCSI_HOST *hd = (struct _MPT_SCSI_HOST *)ioc->sh->hostdata;
+ int rc;
+
+ rc = mptscsih_ioc_reset(ioc, reset_phase);
+
+ if (reset_phase == MPT_IOC_POST_RESET)
+ mptspi_dv_renegotiate(hd);
+
+ return rc;
+}
+
+/*
+ * spi module resume handler
+ */
+static int
+mptspi_resume(struct pci_dev *pdev)
+{
+ MPT_ADAPTER *ioc = pci_get_drvdata(pdev);
+ struct _MPT_SCSI_HOST *hd = (struct _MPT_SCSI_HOST *)ioc->sh->hostdata;
+ int rc;
+
+ rc = mptscsih_resume(pdev);
+ mptspi_dv_renegotiate(hd);
+
+ return rc;
+}
+
/*=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=*/
/*=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=*/
/*
@@ -1032,7 +1096,7 @@
.shutdown = mptscsih_shutdown,
#ifdef CONFIG_PM
.suspend = mptscsih_suspend,
- .resume = mptscsih_resume,
+ .resume = mptspi_resume,
#endif
};
@@ -1061,7 +1125,7 @@
": Registered for IOC event notifications\n"));
}
- if (mpt_reset_register(mptspiDoneCtx, mptscsih_ioc_reset) == 0) {
+ if (mpt_reset_register(mptspiDoneCtx, mptspi_ioc_reset) == 0) {
dprintk((KERN_INFO MYNAM
": Registered for IOC reset notifications\n"));
}
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