mtd: bcm47xxnflash: really unregister NAND on device removal

The field bcma_nflash::mtd is never set to be non-zero anywhere, but we
test for it in the removal path. So the MTD is never unregistered.

Also, we should use nand_release(), not mtd_device_unregister().

Finally, we don't need to use the 'platdata' for stashing/retrieving our
*driver* data -- that's what *_{get,set}_drvdata() are for.

So, kill off bcm_nflash::mtd, and stash the struct bcm47xxnflash in
drvdata instead. Also move the forward declaration of mtd_info up a bit,
since struct bcma_sflash should be using it.

Caught while inspecting other changes being made to this driver. Compile
tested only.

Signed-off-by: Brian Norris <computersforpeace@gmail.com>
Cc: "Rafał Miłecki" <zajec5@gmail.com>
Cc: linux-wireless@vger.kernel.org
Acked-by: Boris Brezillon <boris.brezillon@free-electrons.com>

diff --git a/drivers/mtd/nand/bcm47xxnflash/main.c b/drivers/mtd/nand/bcm47xxnflash/main.c
index 9ba0c0f..0b3acc4 100644 (file)
--- a/drivers/mtd/nand/bcm47xxnflash/main.c
+++ b/drivers/mtd/nand/bcm47xxnflash/main.c
@@ -49,6 +49,8 @@ static int bcm47xxnflash_probe(struct platform_device *pdev)
                return err;
        }
 
+       platform_set_drvdata(pdev, b47n);
+
        err = mtd_device_parse_register(&b47n->mtd, probes, NULL, NULL, 0);
        if (err) {
                pr_err("Failed to register MTD device: %d\n", err);
@@ -60,10 +62,9 @@ static int bcm47xxnflash_probe(struct platform_device *pdev)
 
 static int bcm47xxnflash_remove(struct platform_device *pdev)
 {
-       struct bcma_nflash *nflash = dev_get_platdata(&pdev->dev);
+       struct bcm47xxnflash *nflash = platform_get_drvdata(pdev);
 
-       if (nflash->mtd)
-               mtd_device_unregister(nflash->mtd);
+       nand_release(&nflash->mtd);
 
        return 0;
 }

diff --git a/include/linux/bcma/bcma_driver_chipcommon.h b/include/linux/bcma/bcma_driver_chipcommon.h
index cf03843..db51a6f 100644 (file)
--- a/include/linux/bcma/bcma_driver_chipcommon.h
+++ b/include/linux/bcma/bcma_driver_chipcommon.h
@@ -579,6 +579,8 @@ struct bcma_pflash {
 };
 
 #ifdef CONFIG_BCMA_SFLASH
+struct mtd_info;
+
 struct bcma_sflash {
        bool present;
        u32 window;
@@ -592,13 +594,9 @@ struct bcma_sflash {
 #endif
 
 #ifdef CONFIG_BCMA_NFLASH
-struct mtd_info;
-
 struct bcma_nflash {
        bool present;
        bool boot;              /* This is the flash the SoC boots from */
-
-       struct mtd_info *mtd;
 };
 #endif