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greybus: bundle: check for duplicate bundle ids

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Check at bundle creation time to ensure we're not creating a bundle
with an id that's the same as one that's already been created.

Signed-off-by: Alex Elder <elder@linaro.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@google.com>
This commit is contained in:
Alex Elder 2015-06-09 17:42:57 -05:00 • committed by Greg Kroah-Hartman
parent c27a253fc0
commit 8267616b3e
1 changed files with 10 additions and 0 deletions
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10
drivers/staging/greybus/bundle.c
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@ -165,6 +165,16 @@ struct gb_bundle *gb_bundle_create(struct gb_interface *intf, u8 bundle_id,
struct gb_bundle *bundle; struct gb_bundle *bundle;
int retval; int retval;
/*
* Reject any attempt to reuse a bundle id. We initialize
* these serially, so there's no need to worry about keeping
* the interface bundle list locked here.
*/
if (gb_bundle_find(intf, bundle_id)) {
pr_err("duplicate bundle id 0x%02hhx\n", bundle_id);
return NULL;
}
bundle = kzalloc(sizeof(*bundle), GFP_KERNEL); bundle = kzalloc(sizeof(*bundle), GFP_KERNEL);
if (!bundle) if (!bundle)
return NULL; return NULL;