[PATCH] handle errors returned by platform_get_irq*()

platform_get_irq*() now returns on -ENXIO when the resource cannot be
found.  Ensure all users of platform_get_irq*() handle this error
appropriately.

Signed-off-by: David Vrabel <dvrabel@arcom.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>

3 files changed, 16 insertions, 2 deletions

diff --git a/drivers/i2c/busses/i2c-iop3xx.c b/drivers/i2c/busses/i2c-iop3xx.c
index 1414851a17b8..d00a02fc23e4 100644
--- a/drivers/i2c/busses/i2c-iop3xx.c
+++ b/drivers/i2c/busses/i2c-iop3xx.c
@@ -434,7 +434,7 @@ static int
 iop3xx_i2c_probe(struct platform_device *pdev)
 {
         struct resource *res;
-        int ret;
+        int ret, irq;
         struct i2c_adapter *new_adapter;
         struct i2c_algo_iop3xx_data *adapter_data;
 
@@ -470,7 +470,12 @@ iop3xx_i2c_probe(struct platform_device *pdev)
                 goto release_region;
         }
 
-        ret = request_irq(platform_get_irq(pdev, 0), iop3xx_i2c_irq_handler, 0,
+        irq = platform_get_irq(pdev, 0);
+        if (irq < 0) {
+                ret = -ENXIO;
+                goto unmap;
+        }
+        ret = request_irq(irq, iop3xx_i2c_irq_handler, 0,
                                 pdev->name, adapter_data);
 
         if (ret) {
diff --git a/drivers/i2c/busses/i2c-mpc.c b/drivers/i2c/busses/i2c-mpc.c
index 5ccd338a9dc9..2721e4c8184a 100644
--- a/drivers/i2c/busses/i2c-mpc.c
+++ b/drivers/i2c/busses/i2c-mpc.c
@@ -302,6 +302,10 @@ static int fsl_i2c_probe(struct platform_device *pdev)
         }
 
         i2c->irq = platform_get_irq(pdev, 0);
+        if (i2c->irq < 0) {
+                result = -ENXIO;
+                goto fail_get_irq;
+        }
         i2c->flags = pdata->device_flags;
         init_waitqueue_head(&i2c->queue);
 
@@ -340,6 +344,7 @@ static int fsl_i2c_probe(struct platform_device *pdev)
       fail_irq:
         iounmap(i2c->base);
       fail_map:
+      fail_get_irq:
         kfree(i2c);
         return result;
 };
diff --git a/drivers/i2c/busses/i2c-mv64xxx.c b/drivers/i2c/busses/i2c-mv64xxx.c
index 22781d84f79f..ac5cde1bbd2b 100644
--- a/drivers/i2c/busses/i2c-mv64xxx.c
+++ b/drivers/i2c/busses/i2c-mv64xxx.c
@@ -516,6 +516,10 @@ mv64xxx_i2c_probe(struct platform_device *pd)
         drv_data->freq_m = pdata->freq_m;
         drv_data->freq_n = pdata->freq_n;
         drv_data->irq = platform_get_irq(pd, 0);
+        if (drv_data->irq < 0) {
+                rc = -ENXIO;
+                goto exit_unmap_regs;
+        }
         drv_data->adapter.id = I2C_HW_MV64XXX;
         drv_data->adapter.algo = &mv64xxx_i2c_algo;
         drv_data->adapter.owner = THIS_MODULE;