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path: root/drivers/thunderbolt/switch.c
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Diffstat (limited to 'drivers/thunderbolt/switch.c')
-rw-r--r--drivers/thunderbolt/switch.c45
1 files changed, 33 insertions, 12 deletions
diff --git a/drivers/thunderbolt/switch.c b/drivers/thunderbolt/switch.c
index c1b016574fb4..10b56c66fec3 100644
--- a/drivers/thunderbolt/switch.c
+++ b/drivers/thunderbolt/switch.c
@@ -239,7 +239,16 @@ static int tb_switch_nvm_read(void *priv, unsigned int offset, void *val,
int ret;
pm_runtime_get_sync(&sw->dev);
+
+ if (!mutex_trylock(&sw->tb->lock)) {
+ ret = restart_syscall();
+ goto out;
+ }
+
ret = dma_port_flash_read(sw->dma_port, offset, val, bytes);
+ mutex_unlock(&sw->tb->lock);
+
+out:
pm_runtime_mark_last_busy(&sw->dev);
pm_runtime_put_autosuspend(&sw->dev);
@@ -1019,7 +1028,6 @@ static int tb_switch_set_authorized(struct tb_switch *sw, unsigned int val)
* the new tunnel too early.
*/
pci_lock_rescan_remove();
- pm_runtime_get_sync(&sw->dev);
switch (val) {
/* Approve switch */
@@ -1040,8 +1048,6 @@ static int tb_switch_set_authorized(struct tb_switch *sw, unsigned int val)
break;
}
- pm_runtime_mark_last_busy(&sw->dev);
- pm_runtime_put_autosuspend(&sw->dev);
pci_unlock_rescan_remove();
if (!ret) {
@@ -1069,7 +1075,10 @@ static ssize_t authorized_store(struct device *dev,
if (val > 2)
return -EINVAL;
+ pm_runtime_get_sync(&sw->dev);
ret = tb_switch_set_authorized(sw, val);
+ pm_runtime_mark_last_busy(&sw->dev);
+ pm_runtime_put_autosuspend(&sw->dev);
return ret ? ret : count;
}
@@ -1195,8 +1204,12 @@ static ssize_t nvm_authenticate_store(struct device *dev,
bool val;
int ret;
- if (!mutex_trylock(&sw->tb->lock))
- return restart_syscall();
+ pm_runtime_get_sync(&sw->dev);
+
+ if (!mutex_trylock(&sw->tb->lock)) {
+ ret = restart_syscall();
+ goto exit_rpm;
+ }
/* If NVMem devices are not yet added */
if (!sw->nvm) {
@@ -1217,13 +1230,9 @@ static ssize_t nvm_authenticate_store(struct device *dev,
goto exit_unlock;
}
- pm_runtime_get_sync(&sw->dev);
ret = nvm_validate_and_write(sw);
- if (ret) {
- pm_runtime_mark_last_busy(&sw->dev);
- pm_runtime_put_autosuspend(&sw->dev);
+ if (ret)
goto exit_unlock;
- }
sw->nvm->authenticating = true;
@@ -1239,12 +1248,13 @@ static ssize_t nvm_authenticate_store(struct device *dev,
} else {
ret = nvm_authenticate_device(sw);
}
- pm_runtime_mark_last_busy(&sw->dev);
- pm_runtime_put_autosuspend(&sw->dev);
}
exit_unlock:
mutex_unlock(&sw->tb->lock);
+exit_rpm:
+ pm_runtime_mark_last_busy(&sw->dev);
+ pm_runtime_put_autosuspend(&sw->dev);
if (ret)
return ret;
@@ -1380,11 +1390,22 @@ static void tb_switch_release(struct device *dev)
*/
static int __maybe_unused tb_switch_runtime_suspend(struct device *dev)
{
+ struct tb_switch *sw = tb_to_switch(dev);
+ const struct tb_cm_ops *cm_ops = sw->tb->cm_ops;
+
+ if (cm_ops->runtime_suspend_switch)
+ return cm_ops->runtime_suspend_switch(sw);
+
return 0;
}
static int __maybe_unused tb_switch_runtime_resume(struct device *dev)
{
+ struct tb_switch *sw = tb_to_switch(dev);
+ const struct tb_cm_ops *cm_ops = sw->tb->cm_ops;
+
+ if (cm_ops->runtime_resume_switch)
+ return cm_ops->runtime_resume_switch(sw);
return 0;
}