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greybus: es2: allow ARPC result to be ignored

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Allow user of ARPC to pass a NULL pointer for the ARPC result.

For simple requests there may only be one error code for remote errors,
or the caller may simply not care to differentiate them.

Signed-off-by: Johan Hovold <johan@hovoldconsulting.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@google.com>
This commit is contained in:
Johan Hovold 2016-08-03 14:09:33 +02:00 committed by Greg Kroah-Hartman
parent 4ae2d96263
commit 121bae2bec
1 changed files with 4 additions and 2 deletions
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6
drivers/staging/greybus/es2.c
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@ -1184,7 +1184,8 @@ static int arpc_sync(struct es2_ap_dev *es2, u8 type, void *payload,
unsigned long flags;
int retval;
*result = 0;
if (result)
*result = 0;
rpc = arpc_alloc(payload, size, type);
if (!rpc)
@ -1209,7 +1210,8 @@ static int arpc_sync(struct es2_ap_dev *es2, u8 type, void *payload,
if (rpc->resp->result) {
retval = -EREMOTEIO;
*result = rpc->resp->result;
if (result)
*result = rpc->resp->result;
} else {
retval = 0;
}