From ff48ac9c84f0b318dfce665605d72e86dfcfe008 Mon Sep 17 00:00:00 2001 From: Chao Liu Date: Tue, 7 Jun 2022 15:15:15 +0800 Subject: [PATCH] get irq->module relationship from /sys/bus/pci/*/driver Signed-off-by: Chao Liu --- classify.c | 19 +++++++++++++++++-- 1 file changed, 17 insertions(+), 2 deletions(-) --- a/classify.c +++ b/classify.c @@ -7,6 +7,7 @@ #include #include #include +#include #include "irqbalance.h" #include "types.h" @@ -578,7 +579,7 @@ static int check_for_module_ban(char *na return 0; } -static int check_for_irq_ban(int irq, GList *proc_interrupts) +static int check_for_irq_ban(int irq, char *mod, GList *proc_interrupts) { struct irq_info find, *res; GList *entry; @@ -594,6 +595,9 @@ static int check_for_irq_ban(int irq, GL /* * Check to see if we banned module which the irq belongs to. */ + if (mod != NULL && strlen(mod) > 0 && check_for_module_ban(mod)) + return 1; + entry = g_list_find_custom(proc_interrupts, &find, compare_ints); if (entry) { res = entry->data; @@ -609,14 +613,25 @@ static void add_new_irq(char *path, stru struct irq_info *new; struct user_irq_policy pol; int irq = hint->irq; + char buf[PATH_MAX], drvpath[PATH_MAX]; + char *mod = NULL; + int ret; new = get_irq_info(irq); if (new) return; + if (path) { + sprintf(buf, "%s/driver", path); + ret = readlink(buf, drvpath, PATH_MAX); + if (ret > 0 && ret < PATH_MAX) { + drvpath[ret] = '\0'; + mod = basename(drvpath); + } + } /* Set NULL devpath for the irq has no sysfs entries */ get_irq_user_policy(path, irq, &pol); - if ((pol.ban == 1) || check_for_irq_ban(irq, proc_interrupts)) { /*FIXME*/ + if ((pol.ban == 1) || check_for_irq_ban(irq, mod, proc_interrupts)) { /*FIXME*/ __add_banned_irq(irq, &banned_irqs); new = get_irq_info(irq); } else