Driver core fixes for 4.14-rc4
Here are a few small fixes for 4.14-rc4. The removal of DRIVER_ATTR() was almost completed by 4.14-rc1, but one straggler made it in through some other tree (odds are, one of mine...) So there's a simple removal of the last user, and then finally the macro is removed from the tree. There's a fix for old crazy udev instances that insist on reloading a module when it is removed from the kernel due to the new uevents for bind/unbind. This fixes the reported regression, hopefully some year in the future we can drop the workaround, once users update to the latest version, but I'm not holding my breath. And then there's a build fix for a linker warning, and a buffer overflow fix to match the PCI fixes you took through the PCI tree in the same area. All of these have been in linux-next for a few weeks while I've been traveling, sorry for the delay. Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org> -----BEGIN PGP SIGNATURE----- iG0EABECAC0WIQT0tgzFv3jCIUoxPcsxR9QN2y37KQUCWdN8qA8cZ3JlZ0Brcm9h aC5jb20ACgkQMUfUDdst+ymLEgCfUSSBhxW04teEcPua4QygLv2omK0An2SRkpnY 28nn+D+AfeOByQImY8v+ =RQY+ -----END PGP SIGNATURE----- Merge tag 'driver-core-4.14-rc4' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/driver-core Pull driver core fixes from Greg KH: "Here are a few small fixes for 4.14-rc4. The removal of DRIVER_ATTR() was almost completed by 4.14-rc1, but one straggler made it in through some other tree (odds are, one of mine...) So there's a simple removal of the last user, and then finally the macro is removed from the tree. There's a fix for old crazy udev instances that insist on reloading a module when it is removed from the kernel due to the new uevents for bind/unbind. This fixes the reported regression, hopefully some year in the future we can drop the workaround, once users update to the latest version, but I'm not holding my breath. And then there's a build fix for a linker warning, and a buffer overflow fix to match the PCI fixes you took through the PCI tree in the same area. All of these have been in linux-next for a few weeks while I've been traveling, sorry for the delay" * tag 'driver-core-4.14-rc4' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/driver-core: driver core: remove DRIVER_ATTR fpga: altera-cvp: remove DRIVER_ATTR() usage driver core: platform: Don't read past the end of "driver_override" buffer base: arch_topology: fix section mismatch build warnings driver core: suppress sending MODALIAS in UNBIND uevents
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commit
c4142ed602
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@ -196,12 +196,13 @@ struct driver_attribute {
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};
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Device drivers can export attributes via their sysfs directories.
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Drivers can declare attributes using a DRIVER_ATTR macro that works
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identically to the DEVICE_ATTR macro.
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Drivers can declare attributes using a DRIVER_ATTR_RW and DRIVER_ATTR_RO
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macro that works identically to the DEVICE_ATTR_RW and DEVICE_ATTR_RO
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macros.
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Example:
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DRIVER_ATTR(debug,0644,show_debug,store_debug);
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DRIVER_ATTR_RW(debug);
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This is equivalent to declaring:
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@ -366,7 +366,8 @@ struct driver_attribute {
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Declaring:
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DRIVER_ATTR(_name, _mode, _show, _store)
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DRIVER_ATTR_RO(_name)
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DRIVER_ATTR_RW(_name)
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Creation/Removal:
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@ -166,11 +166,11 @@ bool __init topology_parse_cpu_capacity(struct device_node *cpu_node, int cpu)
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}
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#ifdef CONFIG_CPU_FREQ
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static cpumask_var_t cpus_to_visit;
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static void parsing_done_workfn(struct work_struct *work);
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static DECLARE_WORK(parsing_done_work, parsing_done_workfn);
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static cpumask_var_t cpus_to_visit __initdata;
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static void __init parsing_done_workfn(struct work_struct *work);
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static __initdata DECLARE_WORK(parsing_done_work, parsing_done_workfn);
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static int
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static int __init
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init_cpu_capacity_callback(struct notifier_block *nb,
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unsigned long val,
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void *data)
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@ -206,7 +206,7 @@ init_cpu_capacity_callback(struct notifier_block *nb,
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return 0;
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}
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static struct notifier_block init_cpu_capacity_notifier = {
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static struct notifier_block init_cpu_capacity_notifier __initdata = {
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.notifier_call = init_cpu_capacity_callback,
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};
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@ -232,7 +232,7 @@ static int __init register_cpufreq_notifier(void)
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}
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core_initcall(register_cpufreq_notifier);
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static void parsing_done_workfn(struct work_struct *work)
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static void __init parsing_done_workfn(struct work_struct *work)
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{
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cpufreq_unregister_notifier(&init_cpu_capacity_notifier,
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CPUFREQ_POLICY_NOTIFIER);
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@ -868,7 +868,8 @@ static ssize_t driver_override_store(struct device *dev,
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struct platform_device *pdev = to_platform_device(dev);
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char *driver_override, *old, *cp;
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if (count > PATH_MAX)
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/* We need to keep extra room for a newline */
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if (count >= (PAGE_SIZE - 1))
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return -EINVAL;
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driver_override = kstrndup(buf, count, GFP_KERNEL);
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@ -361,12 +361,12 @@ static const struct fpga_manager_ops altera_cvp_ops = {
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.write_complete = altera_cvp_write_complete,
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};
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static ssize_t show_chkcfg(struct device_driver *dev, char *buf)
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static ssize_t chkcfg_show(struct device_driver *dev, char *buf)
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{
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return snprintf(buf, 3, "%d\n", altera_cvp_chkcfg);
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}
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static ssize_t store_chkcfg(struct device_driver *drv, const char *buf,
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static ssize_t chkcfg_store(struct device_driver *drv, const char *buf,
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size_t count)
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{
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int ret;
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@ -378,7 +378,7 @@ static ssize_t store_chkcfg(struct device_driver *drv, const char *buf,
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return count;
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}
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static DRIVER_ATTR(chkcfg, 0600, show_chkcfg, store_chkcfg);
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static DRIVER_ATTR_RW(chkcfg);
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static int altera_cvp_probe(struct pci_dev *pdev,
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const struct pci_device_id *dev_id);
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@ -307,8 +307,6 @@ struct driver_attribute {
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size_t count);
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};
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#define DRIVER_ATTR(_name, _mode, _show, _store) \
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struct driver_attribute driver_attr_##_name = __ATTR(_name, _mode, _show, _store)
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#define DRIVER_ATTR_RW(_name) \
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struct driver_attribute driver_attr_##_name = __ATTR_RW(_name)
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#define DRIVER_ATTR_RO(_name) \
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@ -294,6 +294,26 @@ static void cleanup_uevent_env(struct subprocess_info *info)
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}
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#endif
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static void zap_modalias_env(struct kobj_uevent_env *env)
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{
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static const char modalias_prefix[] = "MODALIAS=";
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int i;
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for (i = 0; i < env->envp_idx;) {
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if (strncmp(env->envp[i], modalias_prefix,
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sizeof(modalias_prefix) - 1)) {
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i++;
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continue;
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}
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if (i != env->envp_idx - 1)
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memmove(&env->envp[i], &env->envp[i + 1],
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sizeof(env->envp[i]) * env->envp_idx - 1);
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env->envp_idx--;
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}
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}
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/**
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* kobject_uevent_env - send an uevent with environmental data
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*
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@ -409,16 +429,29 @@ int kobject_uevent_env(struct kobject *kobj, enum kobject_action action,
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}
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}
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switch (action) {
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case KOBJ_ADD:
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/*
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* Mark "add" and "remove" events in the object to ensure proper
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* events to userspace during automatic cleanup. If the object did
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* send an "add" event, "remove" will automatically generated by
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* the core, if not already done by the caller.
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* Mark "add" event so we can make sure we deliver "remove"
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* event to userspace during automatic cleanup. If
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* the object did send an "add" event, "remove" will
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* automatically generated by the core, if not already done
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* by the caller.
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*/
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if (action == KOBJ_ADD)
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kobj->state_add_uevent_sent = 1;
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else if (action == KOBJ_REMOVE)
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break;
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case KOBJ_REMOVE:
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kobj->state_remove_uevent_sent = 1;
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break;
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case KOBJ_UNBIND:
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zap_modalias_env(env);
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break;
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default:
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break;
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}
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mutex_lock(&uevent_sock_mutex);
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/* we will send an event, so request a new sequence number */
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