From: Raghava Aditya Renukunta <raghavaaditya.renukunta@xxxxxxxx>
During EEH PCI hotplug activity kernel unloads and loads the driver,
causing character device to be unregistered(aac_remove_one).When the
driver is loaded back using aac_probe_one the character device needs
to be registered again for the AIF management tools to work.
Fixed by adding code to register character device in aac_probe_one if
it is unregistered in aac_remove_one.
Signed-off-by: Raghava Aditya Renukunta <raghavaaditya.renukunta@xxxxxxxx>
---
drivers/scsi/aacraid/linit.c | 19 +++++++++++++------
1 file changed, 13 insertions(+), 6 deletions(-)
diff --git a/drivers/scsi/aacraid/linit.c b/drivers/scsi/aacraid/linit.c
index 2094842..7142578 100644
--- a/drivers/scsi/aacraid/linit.c
+++ b/drivers/scsi/aacraid/linit.c
@@ -1123,6 +1123,13 @@ static void __aac_shutdown(struct aac_dev * aac)
else if (aac->max_msix > 1)
pci_disable_msix(aac->pdev);
}
+static void aac_init_char(void)
+{
+ aac_cfg_major = register_chrdev(0, "aac", &aac_cfg_fops);
+ if (aac_cfg_major < 0) {
+ pr_err("aacraid: unable to register \"aac\" device.\n");
+ }
+}
static int aac_probe_one(struct pci_dev *pdev, const struct pci_device_id *id)
{
@@ -1185,6 +1192,9 @@ static int aac_probe_one(struct pci_dev *pdev, const struct pci_device_id *id)
shost->max_cmd_len = 16;
shost->use_cmd_list = 1;
+ if (aac_cfg_major == -2)
+ aac_init_char();
+
aac = (struct aac_dev *)shost->hostdata;
aac->base_start = pci_resource_start(pdev, 0);
aac->scsi_host_ptr = shost;
@@ -1536,7 +1546,7 @@ static void aac_remove_one(struct pci_dev *pdev)
pci_disable_device(pdev);
if (list_empty(&aac_devices)) {
unregister_chrdev(aac_cfg_major, "aac");
- aac_cfg_major = -1;
+ aac_cfg_major = -2;
}
}
@@ -1697,11 +1707,8 @@ static int __init aac_init(void)
if (error < 0)
return error;
- aac_cfg_major = register_chrdev( 0, "aac", &aac_cfg_fops);
- if (aac_cfg_major < 0) {
- printk(KERN_WARNING
- "aacraid: unable to register \"aac\" device.\n");
- }
+ aac_init_char();
+
return 0;
}
--
1.9.1
--
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