Messages in this thread | | | Date | Mon, 15 Jun 2020 10:54:33 +0200 | From | Miquel Raynal <> | Subject | Re: [PATCH v3] mtd: parsers: bcm63xx: simplify CFE detection |
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Hi Álvaro,
Álvaro Fernández Rojas <noltari@gmail.com> wrote on Fri, 12 Jun 2020 09:35:49 +0200:
> Instead of trying to parse CFE version string, which is customized by some > vendors, let's just check that "CFE1" was passed on argument 3. > > Signed-off-by: Álvaro Fernández Rojas <noltari@gmail.com> > Signed-off-by: Jonas Gorski <jonas.gorski@gmail.com> > --- > v3: keep COMPILE_TEST compatibility by adding a new function that only checks > fw_arg3 when CONFIG_MIPS is defined. > v2: use CFE_EPTSEAL definition and avoid using an additional function. > > drivers/mtd/parsers/bcm63xxpart.c | 34 +++++++++++-------------------- > 1 file changed, 12 insertions(+), 22 deletions(-) > > diff --git a/drivers/mtd/parsers/bcm63xxpart.c b/drivers/mtd/parsers/bcm63xxpart.c > index 78f90c6c18fd..c514c04789af 100644 > --- a/drivers/mtd/parsers/bcm63xxpart.c > +++ b/drivers/mtd/parsers/bcm63xxpart.c > @@ -22,6 +22,11 @@ > #include <linux/mtd/partitions.h> > #include <linux/of.h> > > +#ifdef CONFIG_MIPS > +#include <asm/bootinfo.h> > +#include <asm/fw/cfe/cfe_api.h> > +#endif /* CONFIG_MIPS */ > + > #define BCM963XX_CFE_BLOCK_SIZE SZ_64K /* always at least 64KiB */ > > #define BCM963XX_CFE_MAGIC_OFFSET 0x4e0 > @@ -32,28 +37,13 @@ > #define STR_NULL_TERMINATE(x) \ > do { char *_str = (x); _str[sizeof(x) - 1] = 0; } while (0) > > -static int bcm63xx_detect_cfe(struct mtd_info *master) > +static inline int bcm63xx_detect_cfe(void) > { > - char buf[9]; > - int ret; > - size_t retlen; > - > - ret = mtd_read(master, BCM963XX_CFE_VERSION_OFFSET, 5, &retlen, > - (void *)buf); > - buf[retlen] = 0; > - > - if (ret) > - return ret; > - > - if (strncmp("cfe-v", buf, 5) == 0) > - return 0; > - > - /* very old CFE's do not have the cfe-v string, so check for magic */ > - ret = mtd_read(master, BCM963XX_CFE_MAGIC_OFFSET, 8, &retlen, > - (void *)buf); > - buf[retlen] = 0; > - > - return strncmp("CFE1CFE1", buf, 8); > +#ifdef CONFIG_MIPS > + return (fw_arg3 == CFE_EPTSEAL); > +#else > + return 0; > +#endif /* CONFIG_MIPS */
What about:
ret = 0;
#ifdef CONFIG_MIPS ret = (fw_arg3 == CFE_EPTSEAL) #endif
return ret;
This is for shortening the conditional part.
> } > > static int bcm63xx_read_nvram(struct mtd_info *master, > @@ -138,7 +128,7 @@ static int bcm63xx_parse_cfe_partitions(struct mtd_info *master, > struct bcm963xx_nvram *nvram = NULL; > int ret; > > - if (bcm63xx_detect_cfe(master)) > + if (!bcm63xx_detect_cfe()) > return -EINVAL; > > nvram = vzalloc(sizeof(*nvram));
Thanks, Miquèl
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