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usbip: simplify lock handling in valid_request()

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The function calls spin_lock() and spin_unlock() should be in pair. This patch makes
this pairing more clear for the reader of the code.

Signed-off-by: Márton Németh <nm127@freemail.hu>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
This commit is contained in:
Márton Németh 2011-05-24 23:19:18 +02:00 committed by Greg Kroah-Hartman
parent 0392bbb6f6
commit 9ba422b346
1 changed files with 3 additions and 3 deletions
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6
drivers/staging/usbip/stub_rx.c
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@ -304,18 +304,18 @@ static int stub_recv_cmd_unlink(struct stub_device *sdev,
static int valid_request(struct stub_device *sdev, struct usbip_header *pdu) static int valid_request(struct stub_device *sdev, struct usbip_header *pdu)
{ {
struct usbip_device *ud = &sdev->ud; struct usbip_device *ud = &sdev->ud;
int valid = 0;
if (pdu->base.devid == sdev->devid) { if (pdu->base.devid == sdev->devid) {
spin_lock(&ud->lock); spin_lock(&ud->lock);
if (ud->status == SDEV_ST_USED) { if (ud->status == SDEV_ST_USED) {
/* A request is valid. */ /* A request is valid. */
spin_unlock(&ud->lock); valid = 1;
return 1;
} }
spin_unlock(&ud->lock); spin_unlock(&ud->lock);
} }
return 0; return valid;
} }
static struct stub_priv *stub_priv_alloc(struct stub_device *sdev, static struct stub_priv *stub_priv_alloc(struct stub_device *sdev,