tmakin/tegra-linux-noble
1
0
Fork 0
Code Issues Pull Requests Actions Packages Projects Releases Wiki Activity

s390/ap: rework ap_scan_bus() to return true on config change

Browse Source 
BugLink: https://bugs.launchpad.net/bugs/2050019

The AP scan bus function now returns true if there have
been any config changes detected. This will become
important in a follow up patch which will exploit this
hint for further actions. This also required to have
the AP scan bus timer callback reworked as the function
signature has changed to bool ap_scan_bus(void).

Signed-off-by: Harald Freudenberger <freude@linux.ibm.com>
Reviewed-by: Holger Dengler <dengler@linux.ibm.com>
Signed-off-by: Heiko Carstens <hca@linux.ibm.com>
(cherry picked from commit b5caf05ee8795a628992fe7b5ac3e7b9bbd735c5)
Signed-off-by: Frank Heimes <frank.heimes@canonical.com>
Signed-off-by: Andrea Righi <andrea.righi@canonical.com>
This commit is contained in:
Harald Freudenberger
2024-01-30 17:15:47 +01:00
committed by Paolo Pisati
parent 64b46a827e
commit a5b20304b6
1 changed files with 20 additions and 7 deletions
Download Patch File Download Diff File Expand all files Collapse all files
drivers/s390/crypto/ap_bus.c
+20 -7
View File
@@ -103,8 +103,8 @@ debug_info_t *ap_dbf_info;
static atomic64_t ap_scan_bus_count; /* counter ap_scan_bus() invocations */
static int ap_scan_bus_time = AP_CONFIG_TIME;
static struct timer_list ap_scan_bus_timer;
static void ap_scan_bus(struct work_struct *);
static DECLARE_WORK(ap_scan_bus_work, ap_scan_bus);
static void ap_scan_bus_wq_callback(struct work_struct *);
static DECLARE_WORK(ap_scan_bus_work, ap_scan_bus_wq_callback);
/*
* Tasklet & timer for AP request polling and interrupts
@@ -2178,12 +2178,13 @@ static bool ap_config_has_new_doms(void)
/**
* ap_scan_bus(): Scan the AP bus for new devices
* Runs periodically, workqueue timer (ap_scan_bus_time)
* @unused: Unused pointer.
* Returns true if any config change has been detected
* otherwise false.
*/
static void ap_scan_bus(struct work_struct *unused)
static bool ap_scan_bus(void)
{
int ap, config_changed = 0;
bool config_changed;
int ap;
pr_debug(">%s\n", __func__);
@@ -2234,11 +2235,14 @@ static void ap_scan_bus(struct work_struct *unused)
mod_timer(&ap_scan_bus_timer, jiffies + ap_scan_bus_time * HZ);
pr_debug("<%s\n", __func__);
pr_debug("<%s config_changed=%d\n", __func__, config_changed);
return config_changed;
}
/*
* Callback for the ap_scan_bus_timer
* Runs periodically, workqueue timer (ap_scan_bus_time)
*/
static void ap_scan_bus_timer_callback(struct timer_list *unused)
{
@@ -2249,6 +2253,15 @@ static void ap_scan_bus_timer_callback(struct timer_list *unused)
queue_work(system_long_wq, &ap_scan_bus_work);
}
/*
* Callback for the ap_scan_bus_work
*/
static void ap_scan_bus_wq_callback(struct work_struct *unused)
{
/* now finally do the AP bus scan */
ap_scan_bus();
}
static int __init ap_debug_init(void)
{
ap_dbf_info = debug_register("ap", 2, 1,