[PATCH v5] staging: greybus: use %pe in error messages

[pavankumaryalagada@gmail.com]

From: Yalagada Pavan Kumar <pavankumaryalagada@gmail.com>

Use %pe to print the error pointer directly and display its
error name.

Keep PTR_ERR() calls when the numeric error value is needed
for returning the error code.

Signed-off-by: Yalagada Pavan Kumar <pavankumaryalagada@gmail.com>
Reviewed-by: Alex Elder <elder@riscstar.com>
---
v5:
- Drop arche-apb-ctrl.c and arche-platform.c changes because the
  files were removed.
- keep only the uart.c change, as the fw-core.c changes are already
  present in staging/staging-next.

v4:
- Return error codes directly instead of storing them in ret,
  as suggested by Julia Lawall.
- Remove the unused ret variable.

v3:
- Extend the %pe conversion throughout Greybus, as suggested by Alex Elder.

v2:
- Use %pe in the firmware management case, as suggested by Jeremy Clifton,
  to match the other cases.

v1: https://lore.kernel.org/outreachy/as0nhVbagZa8Birm@user/T/#t
---
 drivers/staging/greybus/uart.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/staging/greybus/uart.c b/drivers/staging/greybus/uart.c
index d47f00751e7a..74c9898c0eed 100644
--- a/drivers/staging/greybus/uart.c
+++ b/drivers/staging/greybus/uart.c
@@ -956,7 +956,7 @@ static int gb_tty_init(void)
 	gb_tty_driver = tty_alloc_driver(GB_NUM_MINORS, TTY_DRIVER_REAL_RAW |
 					 TTY_DRIVER_DYNAMIC_DEV);
 	if (IS_ERR(gb_tty_driver)) {
-		pr_err("Can not allocate tty driver\n");
+		pr_err("Can not allocate tty driver: %pe\n", gb_tty_driver);
 		retval = PTR_ERR(gb_tty_driver);
 		goto fail_unregister_dev;
 	}
-- 
2.43.0