diff options
| author | Alan Stern <stern@rowland.harvard.edu> | 2008-10-02 11:48:13 -0400 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@suse.de> | 2008-10-17 14:41:03 -0700 |
| commit | 9beeee6584b9aa4f9192055512411484a2a624df (patch) | |
| tree | 6eec55264d86791a1d4f61bdb9158cf9c720f7ce /drivers/usb/host | |
| parent | 2b70f07343389cb474235def00b021a645ede916 (diff) | |
USB: EHCI: log a warning if ehci-hcd is not loaded first
This patch (as1139) adds a warning to the system log whenever ehci-hcd
is loaded after ohci-hcd or uhci-hcd. Nowadays most distributions are
pretty good about not doing this; maybe the warning will help convince
anyone still doing it wrong.
Signed-off-by: Alan Stern <stern@rowland.harvard.edu>
Cc: stable <stable@kernel.org> [2.6.27]
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
Diffstat (limited to 'drivers/usb/host')
| -rw-r--r-- | drivers/usb/host/ehci-hcd.c | 15 | ||||
| -rw-r--r-- | drivers/usb/host/ohci-hcd.c | 3 | ||||
| -rw-r--r-- | drivers/usb/host/uhci-hcd.c | 3 |
3 files changed, 19 insertions, 2 deletions
diff --git a/drivers/usb/host/ehci-hcd.c b/drivers/usb/host/ehci-hcd.c index fcbc1f2b237..358df2a6c39 100644 --- a/drivers/usb/host/ehci-hcd.c +++ b/drivers/usb/host/ehci-hcd.c @@ -1046,6 +1046,12 @@ static int __init ehci_hcd_init(void) return -ENODEV; printk(KERN_INFO "%s: " DRIVER_DESC "\n", hcd_name); + set_bit(USB_EHCI_LOADED, &usb_hcds_loaded); + if (test_bit(USB_UHCI_LOADED, &usb_hcds_loaded) || + test_bit(USB_OHCI_LOADED, &usb_hcds_loaded)) + printk(KERN_WARNING "Warning! ehci_hcd should always be loaded" + " before uhci_hcd and ohci_hcd, not after\n"); + pr_debug("%s: block sizes: qh %Zd qtd %Zd itd %Zd sitd %Zd\n", hcd_name, sizeof(struct ehci_qh), sizeof(struct ehci_qtd), @@ -1053,8 +1059,10 @@ static int __init ehci_hcd_init(void) #ifdef DEBUG ehci_debug_root = debugfs_create_dir("ehci", NULL); - if (!ehci_debug_root) - return -ENOENT; + if (!ehci_debug_root) { + retval = -ENOENT; + goto err_debug; + } #endif #ifdef PLATFORM_DRIVER @@ -1102,6 +1110,8 @@ clean0: debugfs_remove(ehci_debug_root); ehci_debug_root = NULL; #endif +err_debug: + clear_bit(USB_EHCI_LOADED, &usb_hcds_loaded); return retval; } module_init(ehci_hcd_init); @@ -1123,6 +1133,7 @@ static void __exit ehci_hcd_cleanup(void) #ifdef DEBUG debugfs_remove(ehci_debug_root); #endif + clear_bit(USB_EHCI_LOADED, &usb_hcds_loaded); } module_exit(ehci_hcd_cleanup); diff --git a/drivers/usb/host/ohci-hcd.c b/drivers/usb/host/ohci-hcd.c index 0afeda836df..8647dab0d7f 100644 --- a/drivers/usb/host/ohci-hcd.c +++ b/drivers/usb/host/ohci-hcd.c @@ -1095,6 +1095,7 @@ static int __init ohci_hcd_mod_init(void) printk(KERN_INFO "%s: " DRIVER_DESC "\n", hcd_name); pr_debug ("%s: block sizes: ed %Zd td %Zd\n", hcd_name, sizeof (struct ed), sizeof (struct td)); + set_bit(USB_OHCI_LOADED, &usb_hcds_loaded); #ifdef DEBUG ohci_debug_root = debugfs_create_dir("ohci", NULL); @@ -1181,6 +1182,7 @@ static int __init ohci_hcd_mod_init(void) error_debug: #endif + clear_bit(USB_OHCI_LOADED, &usb_hcds_loaded); return retval; } module_init(ohci_hcd_mod_init); @@ -1211,6 +1213,7 @@ static void __exit ohci_hcd_mod_exit(void) #ifdef DEBUG debugfs_remove(ohci_debug_root); #endif + clear_bit(USB_OHCI_LOADED, &usb_hcds_loaded); } module_exit(ohci_hcd_mod_exit); diff --git a/drivers/usb/host/uhci-hcd.c b/drivers/usb/host/uhci-hcd.c index 2dddb258b0d..cf5e4cf7ea4 100644 --- a/drivers/usb/host/uhci-hcd.c +++ b/drivers/usb/host/uhci-hcd.c @@ -955,6 +955,7 @@ static int __init uhci_hcd_init(void) printk(KERN_INFO "uhci_hcd: " DRIVER_DESC "%s\n", ignore_oc ? ", overcurrent ignored" : ""); + set_bit(USB_UHCI_LOADED, &usb_hcds_loaded); if (DEBUG_CONFIGURED) { errbuf = kmalloc(ERRBUF_LEN, GFP_KERNEL); @@ -987,6 +988,7 @@ debug_failed: errbuf_failed: + clear_bit(USB_UHCI_LOADED, &usb_hcds_loaded); return retval; } @@ -996,6 +998,7 @@ static void __exit uhci_hcd_cleanup(void) kmem_cache_destroy(uhci_up_cachep); debugfs_remove(uhci_debugfs_root); kfree(errbuf); + clear_bit(USB_UHCI_LOADED, &usb_hcds_loaded); } module_init(uhci_hcd_init); |