[PATCH] mtd: nuc900_nand: read correct SMISR register

Brian Norris
2016-01-15T18:03:29Z

On Wed, Jan 13, 2016 at 10:38:08PM +0100, Arnd Bergmann wrote:
> The nuc900_nand driver has always passed an incorrect register
> address in its nuc900_check_rb() function, which cannot possibly
> work, and in some configurations gives us a build warning:
>
> drivers/mtd/nand/nuc900_nand.c: In function 'nuc900_check_rb':
> drivers/mtd/nand/nuc900_nand.c:27:23: warning: passing argument 1 of '__raw_readl' makes pointer from integer without a cast [-Wint-conversion]
> #define REG_SMISR 0xac
> drivers/mtd/nand/nuc900_nand.c:118:20: note: in expansion of macro 'REG_SMISR'
> val = __raw_readl(REG_SMISR);
>
> This makes sure we actually read from the register rather than
> from (void *)0x000000ac in user space.
>
> I suspect nobody noticed this before because the nuc900_nand_devready()
> function never gets called, or nobody uses this driver on an upstream
> kernel. Possibly even both.
>
> Signed-off-by: Arnd Bergmann <arnd@arndb.de>

Pushed to l2-mtd.git. Thanks.