From c82a43d40b93200a10a9fec0a489791e65e135ca Mon Sep 17 00:00:00 2001 From: Cyrill Gorcunov Date: Mon, 26 Oct 2009 23:28:11 +0300 Subject: irq: Do not attempt to create subdirectories if /proc/irq/ failed If a parent directory (ie /proc/irq/) could not be created we should not attempt to create subdirectories. Otherwise it would lead that "smp_affinity" and "spurious" entries are may be registered under /proc root instead of a proper place. Signed-off-by: Cyrill Gorcunov Cc: Rusty Russell Cc: Yinghai Lu LKML-Reference: <20091026202811.GD5321@lenovo> Signed-off-by: Ingo Molnar --- kernel/irq/proc.c | 2 ++ 1 file changed, 2 insertions(+) (limited to 'kernel/irq/proc.c') diff --git a/kernel/irq/proc.c b/kernel/irq/proc.c index 692363dd591..dfef5b9f384 100644 --- a/kernel/irq/proc.c +++ b/kernel/irq/proc.c @@ -214,6 +214,8 @@ void register_irq_proc(unsigned int irq, struct irq_desc *desc) /* create /proc/irq/1234 */ desc->dir = proc_mkdir(name, root_irq_dir); + if (!desc->dir) + return; #ifdef CONFIG_SMP /* create /proc/irq//smp_affinity */ -- cgit v1.2.3 From a1afb6371bb5341057056194d1168753f6d77242 Mon Sep 17 00:00:00 2001 From: Alexey Dobriyan Date: Fri, 28 Aug 2009 22:19:33 +0400 Subject: genirq: switch /proc/irq/*/spurious to seq_file [ tglx: compacted it a bit ] Signed-off-by: Alexey Dobriyan LKML-Reference: <20090828181743.GA14050@x200.localdomain> Signed-off-by: Andrew Morton Signed-off-by: Thomas Gleixner --- kernel/irq/proc.c | 36 +++++++++++++++++++++--------------- 1 file changed, 21 insertions(+), 15 deletions(-) (limited to 'kernel/irq/proc.c') diff --git a/kernel/irq/proc.c b/kernel/irq/proc.c index dfef5b9f384..4e47f11da6a 100644 --- a/kernel/irq/proc.c +++ b/kernel/irq/proc.c @@ -148,18 +148,28 @@ static const struct file_operations default_affinity_proc_fops = { }; #endif -static int irq_spurious_read(char *page, char **start, off_t off, - int count, int *eof, void *data) +static int irq_spurious_proc_show(struct seq_file *m, void *v) { - struct irq_desc *desc = irq_to_desc((long) data); - return sprintf(page, "count %u\n" - "unhandled %u\n" - "last_unhandled %u ms\n", - desc->irq_count, - desc->irqs_unhandled, - jiffies_to_msecs(desc->last_unhandled)); + struct irq_desc *desc = irq_to_desc((long) m->private); + + seq_printf(m, "count %u\n" "unhandled %u\n" "last_unhandled %u ms\n", + desc->irq_count, desc->irqs_unhandled, + jiffies_to_msecs(desc->last_unhandled)); + return 0; +} + +static int irq_spurious_proc_open(struct inode *inode, struct file *file) +{ + return single_open(file, irq_spurious_proc_show, NULL); } +static const struct file_operations irq_spurious_proc_fops = { + .open = irq_spurious_proc_open, + .read = seq_read, + .llseek = seq_lseek, + .release = single_release, +}; + #define MAX_NAMELEN 128 static int name_unique(unsigned int irq, struct irqaction *new_action) @@ -204,7 +214,6 @@ void register_handler_proc(unsigned int irq, struct irqaction *action) void register_irq_proc(unsigned int irq, struct irq_desc *desc) { char name [MAX_NAMELEN]; - struct proc_dir_entry *entry; if (!root_irq_dir || (desc->chip == &no_irq_chip) || desc->dir) return; @@ -223,11 +232,8 @@ void register_irq_proc(unsigned int irq, struct irq_desc *desc) &irq_affinity_proc_fops, (void *)(long)irq); #endif - entry = create_proc_entry("spurious", 0444, desc->dir); - if (entry) { - entry->data = (void *)(long)irq; - entry->read_proc = irq_spurious_read; - } + proc_create_data("spurious", 0444, desc->dir, + &irq_spurious_proc_fops, (void *)(long)irq); } #undef MAX_NAMELEN -- cgit v1.2.3 From 34769945f7cd9ab470413ffe64426e3ad069f49e Mon Sep 17 00:00:00 2001 From: Thomas Gleixner Date: Fri, 20 Nov 2009 11:46:21 +0100 Subject: genirq: Fix spurious irq seqfile conversion single_open data argument must be PDE(inode)->data instead of NULL otherwise seq_file->private is always NULL and we always read the spurious data of irq 0. Reported-by: Alexey Dobriyan Signed-off-by: Thomas Gleixner --- kernel/irq/proc.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) (limited to 'kernel/irq/proc.c') diff --git a/kernel/irq/proc.c b/kernel/irq/proc.c index 4e47f11da6a..0832145fea9 100644 --- a/kernel/irq/proc.c +++ b/kernel/irq/proc.c @@ -136,7 +136,7 @@ out: static int default_affinity_open(struct inode *inode, struct file *file) { - return single_open(file, default_affinity_show, NULL); + return single_open(file, default_affinity_show, PDE(inode)->data); } static const struct file_operations default_affinity_proc_fops = { -- cgit v1.2.3