diff options
author | David Herrmann <dh.herrmann@gmail.com> | 2014-07-29 17:14:16 +0200 |
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committer | Jiri Kosina <jkosina@suse.cz> | 2014-08-25 03:28:05 -0500 |
commit | 56c47754631b98624e844305709d6a296bde20d1 (patch) | |
tree | fe555a648df69f9f26b3a12bb2a8d2ad045512e3 /drivers/hid | |
parent | 0e0d7520064c9f5668c030afafdbcab242176195 (diff) | |
download | op-kernel-dev-56c47754631b98624e844305709d6a296bde20d1.zip op-kernel-dev-56c47754631b98624e844305709d6a296bde20d1.tar.gz |
HID: uhid: forward create_req to create2_req
Instead of hard-coding the uhid_dev_create() function twice, copy any
create_req into a create2_req structure and forward it.
We allocate uhid_create_req on the stack here, but that should be fine.
Unlike uhid_create2_req it is fairly small (<1KB) and it's only used
temporarily to swap entries. uhid_dev_create2() doesn't access it.
Signed-off-by: David Herrmann <dh.herrmann@gmail.com>
Signed-off-by: Jiri Kosina <jkosina@suse.cz>
Diffstat (limited to 'drivers/hid')
-rw-r--r-- | drivers/hid/uhid.c | 90 |
1 files changed, 25 insertions, 65 deletions
diff --git a/drivers/hid/uhid.c b/drivers/hid/uhid.c index 16af4d3..c05b544 100644 --- a/drivers/hid/uhid.c +++ b/drivers/hid/uhid.c @@ -359,71 +359,6 @@ static int uhid_event_from_user(const char __user *buffer, size_t len, } #endif -static int uhid_dev_create(struct uhid_device *uhid, - const struct uhid_event *ev) -{ - struct hid_device *hid; - int ret; - - if (uhid->running) - return -EALREADY; - - uhid->rd_size = ev->u.create.rd_size; - if (uhid->rd_size <= 0 || uhid->rd_size > HID_MAX_DESCRIPTOR_SIZE) - return -EINVAL; - - uhid->rd_data = kmalloc(uhid->rd_size, GFP_KERNEL); - if (!uhid->rd_data) - return -ENOMEM; - - if (copy_from_user(uhid->rd_data, ev->u.create.rd_data, - uhid->rd_size)) { - ret = -EFAULT; - goto err_free; - } - - hid = hid_allocate_device(); - if (IS_ERR(hid)) { - ret = PTR_ERR(hid); - goto err_free; - } - - strncpy(hid->name, ev->u.create.name, 127); - hid->name[127] = 0; - strncpy(hid->phys, ev->u.create.phys, 63); - hid->phys[63] = 0; - strncpy(hid->uniq, ev->u.create.uniq, 63); - hid->uniq[63] = 0; - - hid->ll_driver = &uhid_hid_driver; - hid->bus = ev->u.create.bus; - hid->vendor = ev->u.create.vendor; - hid->product = ev->u.create.product; - hid->version = ev->u.create.version; - hid->country = ev->u.create.country; - hid->driver_data = uhid; - hid->dev.parent = uhid_misc.this_device; - - uhid->hid = hid; - uhid->running = true; - - ret = hid_add_device(hid); - if (ret) { - hid_err(hid, "Cannot register HID device\n"); - goto err_hid; - } - - return 0; - -err_hid: - hid_destroy_device(hid); - uhid->hid = NULL; - uhid->running = false; -err_free: - kfree(uhid->rd_data); - return ret; -} - static int uhid_dev_create2(struct uhid_device *uhid, const struct uhid_event *ev) { @@ -484,6 +419,31 @@ err_free: return ret; } +static int uhid_dev_create(struct uhid_device *uhid, + struct uhid_event *ev) +{ + struct uhid_create_req orig; + + orig = ev->u.create; + + if (orig.rd_size <= 0 || orig.rd_size > HID_MAX_DESCRIPTOR_SIZE) + return -EINVAL; + if (copy_from_user(&ev->u.create2.rd_data, orig.rd_data, orig.rd_size)) + return -EFAULT; + + memcpy(ev->u.create2.name, orig.name, sizeof(orig.name)); + memcpy(ev->u.create2.phys, orig.phys, sizeof(orig.phys)); + memcpy(ev->u.create2.uniq, orig.uniq, sizeof(orig.uniq)); + ev->u.create2.rd_size = orig.rd_size; + ev->u.create2.bus = orig.bus; + ev->u.create2.vendor = orig.vendor; + ev->u.create2.product = orig.product; + ev->u.create2.version = orig.version; + ev->u.create2.country = orig.country; + + return uhid_dev_create2(uhid, ev); +} + static int uhid_dev_destroy(struct uhid_device *uhid) { if (!uhid->running) |