[PATCH][V2] input: ims-pcu: return error code rather than -ENOMEM

[PATCH][V2] input: ims-pcu: return error code rather than -ENOMEM

[Colin King]

From: Colin Ian King <colin.king@canonical.com>

Currently the assignment of -ENOMEM to error is redudant because error
is not being read and -ENOMEM is being hard coded as an error return.
Fix this by returning the error code in variable 'error'; this also
allows the error code from a failed call to input_register_device to
be preserved and returned to the caller rather than just returning
a possibly inappropriate -ENOMEM.

Kudos to Dan Carpenter for the suggestion of an improved fix.

Addresses-Coverity: ("Unused value")
Signed-off-by: Colin Ian King <colin.king@canonical.com>

---

V2: change subject line and return the error code rather than
    removing the ENOMEM assignment to error. Thanks to Dan Carpenter
    for explaining a better fix.

---
 drivers/input/misc/ims-pcu.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/input/misc/ims-pcu.c b/drivers/input/misc/ims-pcu.c
index d8dbfc030d0f..08b9b5cdb943 100644
--- a/drivers/input/misc/ims-pcu.c
+++ b/drivers/input/misc/ims-pcu.c
@@ -335,7 +335,7 @@ static int ims_pcu_setup_gamepad(struct ims_pcu *pcu)
 err_free_mem:
 	input_free_device(input);
 	kfree(gamepad);
-	return -ENOMEM;
+	return error;
 }
 
 static void ims_pcu_destroy_gamepad(struct ims_pcu *pcu)
-- 
2.25.1

Re: [PATCH][V2] input: ims-pcu: return error code rather than -ENOMEM

[Dan Carpenter]

On Wed, Jun 03, 2020 at 04:21:51PM +0100, Colin King wrote:
> From: Colin Ian King <colin.king@canonical.com>
> 
> Currently the assignment of -ENOMEM to error is redudant because error
> is not being read and -ENOMEM is being hard coded as an error return.
> Fix this by returning the error code in variable 'error'; this also
> allows the error code from a failed call to input_register_device to
> be preserved and returned to the caller rather than just returning
> a possibly inappropriate -ENOMEM.
> 
> Kudos to Dan Carpenter for the suggestion of an improved fix.
> 
> Addresses-Coverity: ("Unused value")
> Signed-off-by: Colin Ian King <colin.king@canonical.com>

Thanks!

Reviewed-by: Dan Carpenter <dan.carpenter@oracle.com>

regards,
dan carpenter

Re: [PATCH][V2] input: ims-pcu: return error code rather than -ENOMEM

[Dmitry Torokhov]

On Wed, Jun 03, 2020 at 04:21:51PM +0100, Colin King wrote:
> From: Colin Ian King <colin.king@canonical.com>
> 
> Currently the assignment of -ENOMEM to error is redudant because error
> is not being read and -ENOMEM is being hard coded as an error return.
> Fix this by returning the error code in variable 'error'; this also
> allows the error code from a failed call to input_register_device to
> be preserved and returned to the caller rather than just returning
> a possibly inappropriate -ENOMEM.
> 
> Kudos to Dan Carpenter for the suggestion of an improved fix.
> 
> Addresses-Coverity: ("Unused value")
> Signed-off-by: Colin Ian King <colin.king@canonical.com>
> 

Applied, thank you.

-- 
Dmitry