diff options
| author |   Mika Westerberg <mika.westerberg@linux.intel.com> | 2018-12-30 12:17:52 +0200 |
|---|---|---|
| committer | Mika Westerberg <mika.westerberg@linux.intel.com> | 2019-04-18 11:18:53 +0300 |
| commit | 444ac3844895c34ab71ffcec1b3199449d3434a4 (patch) | |
| tree | 740d894bc76d652b3b763457dfbd28be9d2cc63a /drivers/thunderbolt/icm.c | |
| parent | thunderbolt: Add support for DMA tunnels (diff) | |
| download | linux-dev-444ac3844895c34ab71ffcec1b3199449d3434a4.tar.xz linux-dev-444ac3844895c34ab71ffcec1b3199449d3434a4.zip | |
thunderbolt: Make tb_switch_alloc() return ERR_PTR()
In order to detect possible connections to other domains we need to be
able to find out why tb_switch_alloc() fails so make it return ERR_PTR()
instead. This allows the caller to differentiate between errors such as
-ENOMEM which comes from the kernel and for instance -EIO which comes
from the hardware when trying to access the possible switch.
Convert all the current call sites to handle this properly.
Signed-off-by: Mika Westerberg <mika.westerberg@linux.intel.com>
Diffstat (limited to 'drivers/thunderbolt/icm.c')
| -rw-r--r-- | drivers/thunderbolt/icm.c | 6 |
1 files changed, 3 insertions, 3 deletions
diff --git a/drivers/thunderbolt/icm.c b/drivers/thunderbolt/icm.c index 805958e53c58..d1f6ec89763c 100644 --- a/drivers/thunderbolt/icm.c +++ b/drivers/thunderbolt/icm.c @@ -468,7 +468,7 @@ static void add_switch(struct tb_switch *parent_sw, u64 route, pm_runtime_get_sync(&parent_sw->dev); sw = tb_switch_alloc(parent_sw->tb, &parent_sw->dev, route); - if (!sw) + if (IS_ERR(sw)) goto out; sw->uuid = kmemdup(uuid, sizeof(*uuid), GFP_KERNEL); @@ -1848,8 +1848,8 @@ static int icm_start(struct tb *tb) tb->root_switch = tb_switch_alloc_safe_mode(tb, &tb->dev, 0); else tb->root_switch = tb_switch_alloc(tb, &tb->dev, 0); - if (!tb->root_switch) - return -ENODEV; + if (IS_ERR(tb->root_switch)) + return PTR_ERR(tb->root_switch); /* * NVM upgrade has not been tested on Apple systems and they |