[PATCH v3 05/23] ata: libahci_platform: Explicitly set rc on devres_alloc failure

Serge Semin
2022-05-11T23:19:03Z

It's better for readability and maintainability to explicitly assign an
error number to the variable used then as a return value from the method
on the cleanup-on-error path. So adding new code in the method we won't
have to think whether the overridden rc-variable is set afterward in case
of an error. Saving one line of code doesn't worth it especially seeing
the rest of the ahci_platform_get_resources() function errors handling
blocks do explicitly write errno to rc.

Signed-off-by: Serge Semin <Sergey.Semin@baikalelectronics.ru>

---

Changelog v2:
- Drop rc variable initialization (@Damien)
---
drivers/ata/libahci_platform.c | 6 ++++--
1 file changed, 4 insertions(+), 2 deletions(-)

diff --git a/drivers/ata/libahci_platform.c b/drivers/ata/libahci_platform.c
index 32495ae96567..f7f9bfcfc164 100644
--- a/drivers/ata/libahci_platform.c
+++ b/drivers/ata/libahci_platform.c
@@ -389,7 +389,7 @@ struct ahci_host_priv *ahci_platform_get_resources(struct platform_device *pdev,
struct ahci_host_priv *hpriv;
struct clk *clk;
struct device_node *child;
- int i, enabled_ports = 0, rc = -ENOMEM, child_nodes;
+ int i, enabled_ports = 0, rc, child_nodes;
u32 mask_port_map = 0;

if (!devres_open_group(dev, NULL, GFP_KERNEL))
@@ -397,8 +397,10 @@ struct ahci_host_priv *ahci_platform_get_resources(struct platform_device *pdev,

hpriv = devres_alloc(ahci_platform_put_resources, sizeof(*hpriv),
GFP_KERNEL);
- if (!hpriv)
+ if (!hpriv) {
+ rc = -ENOMEM;
goto err_out;
+ }

devres_add(dev, hpriv);

--
2.35.1