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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>
This commit is contained in:
Brian Norris 2015-12-08 17:04:59 -08:00
parent 320092a05d
commit 665d2c2848
2 changed files with 6 additions and 7 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

7
drivers/mtd/nand/bcm47xxnflash/main.c
View File

@ -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;
}

6
include/linux/bcma/bcma_driver_chipcommon.h
View File

@ -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