[SCSI] mptspi: revalidate negotiation parameters after host reset and resume

This is a bug fix for mptspi driver, where after a host reset or
resume, we revalidate the negotiation parameters for all devices.
This bug was introduced when the driver was ported to use the spi
transport layer.

Signed-off-by: Eric Moore <Eric.Moore@lsil.com>
Signed-off-by: James Bottomley <James.Bottomley@SteelEye.com>

1 files changed, 66 insertions, 2 deletions

diff --git a/drivers/message/fusion/mptspi.c b/drivers/message/fusion/mptspi.c
index 09c745b19cc8..f2a4d382ea19 100644
--- a/drivers/message/fusion/mptspi.c
+++ b/drivers/message/fusion/mptspi.c
@@ -783,6 +783,70 @@ static struct pci_device_id mptspi_pci_table[] = {
 };
 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 @@ static struct pci_driver mptspi_driver = {
         .shutdown       = mptscsih_shutdown,
 #ifdef CONFIG_PM
         .suspend        = mptscsih_suspend,
-        .resume         = mptscsih_resume,
+        .resume         = mptspi_resume,
 #endif
 };
 
@@ -1061,7 +1125,7 @@ mptspi_init(void)
                   ": 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"));
         }