72 lines
2.9 KiB
Diff
72 lines
2.9 KiB
Diff
From: Lucas De Marchi <lucas.demarchi@intel.com>
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Date: Tue, 18 Feb 2014 02:19:26 -0300
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Subject: Bluetooth: allocate static minor for vhci
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Origin: https://git.kernel.org/cgit/linux/kernel/git/bluetooth/bluetooth-next.git/commit?id=b075dd40c95d11c2c8690f6c4d6232fc0d9e7f56
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Commit bfacbb9 (Bluetooth: Use devname:vhci module alias for virtual HCI
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driver) added the module alias to hci_vhci module so it's possible to
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create the /dev/vhci node. However creating an alias without
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specifying the minor doesn't allow us to create the node ahead,
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triggerring module auto-load when it's first accessed.
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Starting with depmod from kmod 16 we started to warn if there's a
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devname alias without specifying the major and minor.
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Let's do the same done for uhid, kvm, fuse and others, specifying a
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fixed minor. In systems with systemd as the init the following will
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happen: on early boot systemd will call "kmod static-nodes" to read
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/lib/modules/$(uname -r)/modules.devname and then create the nodes. When
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first accessed these "dead" nodes will trigger the module loading.
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Signed-off-by: Lucas De Marchi <lucas.demarchi@intel.com>
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Acked-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
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---
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Documentation/devices.txt | 1 +
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drivers/bluetooth/hci_vhci.c | 3 ++-
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include/linux/miscdevice.h | 1 +
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3 files changed, 4 insertions(+), 1 deletion(-)
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diff --git a/Documentation/devices.txt b/Documentation/devices.txt
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index 10378cc..04356f5 100644
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--- a/Documentation/devices.txt
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+++ b/Documentation/devices.txt
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@@ -353,6 +353,7 @@ Your cooperation is appreciated.
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133 = /dev/exttrp External device trap
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134 = /dev/apm_bios Advanced Power Management BIOS
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135 = /dev/rtc Real Time Clock
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+ 137 = /dev/vhci Bluetooth virtual HCI driver
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139 = /dev/openprom SPARC OpenBoot PROM
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140 = /dev/relay8 Berkshire Products Octal relay card
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141 = /dev/relay16 Berkshire Products ISO-16 relay card
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diff --git a/drivers/bluetooth/hci_vhci.c b/drivers/bluetooth/hci_vhci.c
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index 1ef6990..add1c6a 100644
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--- a/drivers/bluetooth/hci_vhci.c
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+++ b/drivers/bluetooth/hci_vhci.c
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@@ -359,7 +359,7 @@ static const struct file_operations vhci_fops = {
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static struct miscdevice vhci_miscdev= {
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.name = "vhci",
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.fops = &vhci_fops,
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- .minor = MISC_DYNAMIC_MINOR,
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+ .minor = VHCI_MINOR,
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};
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static int __init vhci_init(void)
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@@ -385,3 +385,4 @@ MODULE_DESCRIPTION("Bluetooth virtual HCI driver ver " VERSION);
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MODULE_VERSION(VERSION);
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MODULE_LICENSE("GPL");
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MODULE_ALIAS("devname:vhci");
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+MODULE_ALIAS_MISCDEV(VHCI_MINOR);
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diff --git a/include/linux/miscdevice.h b/include/linux/miscdevice.h
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index 3737f72..7bb6148 100644
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--- a/include/linux/miscdevice.h
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+++ b/include/linux/miscdevice.h
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@@ -23,6 +23,7 @@
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#define TEMP_MINOR 131 /* Temperature Sensor */
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#define RTC_MINOR 135
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#define EFI_RTC_MINOR 136 /* EFI Time services */
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+#define VHCI_MINOR 137
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#define SUN_OPENPROM_MINOR 139
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#define DMAPI_MINOR 140 /* DMAPI */
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#define NVRAM_MINOR 144
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