6 files changed, 12 insertions, 41 deletions

diff --git a/Documentation/spi/spidev_test.c b/Documentation/spi/spidev_test.c
index 10abd3773e49..16feda901469 100644
--- a/Documentation/spi/spidev_test.c
+++ b/Documentation/spi/spidev_test.c
@@ -58,7 +58,7 @@ static void transfer(int fd)
         };
 
         ret = ioctl(fd, SPI_IOC_MESSAGE(1), &tr);
-        if (ret == 1)
+        if (ret < 1)
                 pabort("can't send spi message");
 
         for (ret = 0; ret < ARRAY_SIZE(tx); ret++) {
diff --git a/drivers/gpio/gpiolib.c b/drivers/gpio/gpiolib.c
index 76be229c814d..eb0c3fe44b29 100644
--- a/drivers/gpio/gpiolib.c
+++ b/drivers/gpio/gpiolib.c
@@ -416,7 +416,8 @@ static int gpio_setup_irq(struct gpio_desc *desc, struct device *dev,
         return 0;
 
 free_sd:
-        sysfs_put(pdesc->value_sd);
+        if (pdesc)
+                sysfs_put(pdesc->value_sd);
 free_id:
         idr_remove(&pdesc_idr, id);
         desc->flags &= GPIO_FLAGS_MASK;
diff --git a/drivers/of/of_mdio.c b/drivers/of/of_mdio.c
index 18ecae4a4375..b4748337223b 100644
--- a/drivers/of/of_mdio.c
+++ b/drivers/of/of_mdio.c
@@ -69,7 +69,7 @@ int of_mdiobus_register(struct mii_bus *mdio, struct device_node *np)
                 }
 
                 phy = get_phy_device(mdio, be32_to_cpup(addr));
-                if (!phy) {
+                if (!phy || IS_ERR(phy)) {
                         dev_err(&mdio->dev, "error probing PHY at address %i\n",
                                 *addr);
                         continue;
diff --git a/drivers/serial/mpc52xx_uart.c b/drivers/serial/mpc52xx_uart.c
index 3119fddaedb5..a176ab4bd65b 100644
--- a/drivers/serial/mpc52xx_uart.c
+++ b/drivers/serial/mpc52xx_uart.c
@@ -29,39 +29,6 @@
  * kind, whether express or implied.
  */
 
-/* Platform device Usage :
- *
- * Since PSCs can have multiple function, the correct driver for each one
- * is selected by calling mpc52xx_match_psc_function(...). The function
- * handled by this driver is "uart".
- *
- * The driver init all necessary registers to place the PSC in uart mode without
- * DCD. However, the pin multiplexing aren't changed and should be set either
- * by the bootloader or in the platform init code.
- *
- * The idx field must be equal to the PSC index (e.g. 0 for PSC1, 1 for PSC2,
- * and so on). So the PSC1 is mapped to /dev/ttyPSC0, PSC2 to /dev/ttyPSC1 and
- * so on. But be warned, it's an ABSOLUTE REQUIREMENT ! This is needed mainly
- * fpr the console code : without this 1:1 mapping, at early boot time, when we
- * are parsing the kernel args console=ttyPSC?, we wouldn't know which PSC it
- * will be mapped to.
- */
-
-/* OF Platform device Usage :
- *
- * This driver is only used for PSCs configured in uart mode.  The device
- * tree will have a node for each PSC with "mpc52xx-psc-uart" in the compatible
- * list.
- *
- * By default, PSC devices are enumerated in the order they are found.  However
- * a particular PSC number can be forces by adding 'device_no = <port#>'
- * to the device node.
- *
- * The driver init all necessary registers to place the PSC in uart mode without
- * DCD. However, the pin multiplexing aren't changed and should be set either
- * by the bootloader or in the platform init code.
- */
-
 #undef DEBUG
 
 #include <linux/device.h>
diff --git a/drivers/spi/omap2_mcspi.c b/drivers/spi/omap2_mcspi.c
index d8356af118a8..e0de0d0eedea 100644
--- a/drivers/spi/omap2_mcspi.c
+++ b/drivers/spi/omap2_mcspi.c
@@ -204,6 +204,7 @@ static inline void mcspi_write_chconf0(const struct spi_device *spi, u32 val)
 
         cs->chconf0 = val;
         mcspi_write_cs_reg(spi, OMAP2_MCSPI_CHCONF0, val);
+        mcspi_read_cs_reg(spi, OMAP2_MCSPI_CHCONF0);
 }
 
 static void omap2_mcspi_set_dma_req(const struct spi_device *spi,
@@ -532,7 +533,7 @@ omap2_mcspi_txrx_pio(struct spi_device *spi, struct spi_transfer *xfer)
                                         goto out;
                                 }
 #ifdef VERBOSE
-                                dev_dbg(&spi->dev, "write-%d %04x\n",
+                                dev_dbg(&spi->dev, "write-%d %08x\n",
                                                 word_len, *tx);
 #endif
                                 __raw_writel(*tx++, tx_reg);
@@ -550,7 +551,7 @@ omap2_mcspi_txrx_pio(struct spi_device *spi, struct spi_transfer *xfer)
                                         mcspi_write_chconf0(spi, l);
                                 *rx++ = __raw_readl(rx_reg);
 #ifdef VERBOSE
-                                dev_dbg(&spi->dev, "read-%d %04x\n",
+                                dev_dbg(&spi->dev, "read-%d %08x\n",
                                                 word_len, *(rx - 1));
 #endif
                         }
diff --git a/drivers/spi/spi.c b/drivers/spi/spi.c
index 9ffb0fdbd6fe..b3a1f9259b62 100644
--- a/drivers/spi/spi.c
+++ b/drivers/spi/spi.c
@@ -41,7 +41,7 @@ static void spidev_release(struct device *dev)
                 spi->master->cleanup(spi);
 
         spi_master_put(spi->master);
-        kfree(dev);
+        kfree(spi);
 }
 
 static ssize_t
@@ -257,6 +257,7 @@ int spi_add_device(struct spi_device *spi)
 {
         static DEFINE_MUTEX(spi_add_lock);
         struct device *dev = spi->master->dev.parent;
+        struct device *d;
         int status;
 
         /* Chipselects are numbered 0..max; validate. */
@@ -278,10 +279,11 @@ int spi_add_device(struct spi_device *spi)
          */
         mutex_lock(&spi_add_lock);
 
-        if (bus_find_device_by_name(&spi_bus_type, NULL, dev_name(&spi->dev))
-                        != NULL) {
+        d = bus_find_device_by_name(&spi_bus_type, NULL, dev_name(&spi->dev));
+        if (d != NULL) {
                 dev_err(dev, "chipselect %d already in use\n",
                                 spi->chip_select);
+                put_device(d);
                 status = -EBUSY;
                 goto done;
         }