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spi: release device claimed by bus_find_device_by_name

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In success case the function bus_find_device_by_name calls
get_device. In our context put_device should be called to
decrease the device count usage.

Signed-off-by: Roman Tereshonkov <roman.tereshonkov@nokia.com>
Signed-off-by: Grant Likely <grant.likely@secretlab.ca>
This commit is contained in:
Roman Tereshonkov 2010-04-16 09:52:59 +00:00 committed by Grant Likely
parent 9bd73715a1
commit 8ec130a017
1 changed files with 4 additions and 2 deletions
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6
drivers/spi/spi.c
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@ -257,6 +257,7 @@ int spi_add_device(struct spi_device *spi)
{ {
static DEFINE_MUTEX(spi_add_lock); static DEFINE_MUTEX(spi_add_lock);
struct device *dev = spi->master->dev.parent; struct device *dev = spi->master->dev.parent;
struct device *d;
int status; int status;
/* Chipselects are numbered 0..max; validate. */ /* Chipselects are numbered 0..max; validate. */
@ -278,10 +279,11 @@ int spi_add_device(struct spi_device *spi)
*/ */
mutex_lock(&spi_add_lock); mutex_lock(&spi_add_lock);
if (bus_find_device_by_name(&spi_bus_type, NULL, dev_name(&spi->dev)) d = bus_find_device_by_name(&spi_bus_type, NULL, dev_name(&spi->dev));
!= NULL) { if (d != NULL) {
dev_err(dev, "chipselect %d already in use\n", dev_err(dev, "chipselect %d already in use\n",
spi->chip_select); spi->chip_select);
put_device(d);
status = -EBUSY; status = -EBUSY;
goto done; goto done;
} }