From 0dd5235f51fb0eb0b8cef3fed35be39b8a06d7bd Mon Sep 17 00:00:00 2001 From: Artem Bityutskiy Date: Wed, 8 Feb 2012 15:13:26 +0200 Subject: [PATCH] mtd: harmonize mtd_point interface implementation Some MTD drivers return -EINVAL if the 'phys' parameter is not NULL, trying to convey that they cannot return the physical address. However, this is not very logical because they still can return the virtual address ('virt'). But some drivers (lpddr) just ignore the 'phys' parameter instead, which is a more logical thing to do. Let's harmonize this and: 1. Always initialize 'virt' and 'phys' to 'NULL' in 'mtd_point()'. 2. Do not return an error if the physical address cannot be found. So as a result, all drivers will set 'phys' to 'NULL' if it is not supported. None of the 'mtd_point()' users use 'phys' anyway, so this should not break anything. I guess we could also just delete this parameter later. Signed-off-by: Artem Bityutskiy Signed-off-by: David Woodhouse --- drivers/mtd/devices/mtdram.c | 3 --- drivers/mtd/devices/phram.c | 4 ---- drivers/mtd/devices/pmc551.c | 4 ---- drivers/mtd/devices/slram.c | 3 --- drivers/mtd/mtdcore.c | 3 +++ 5 files changed, 3 insertions(+), 14 deletions(-) diff --git a/drivers/mtd/devices/mtdram.c b/drivers/mtd/devices/mtdram.c index 0e0e6ed4443..ec59d65897f 100644 --- a/drivers/mtd/devices/mtdram.c +++ b/drivers/mtd/devices/mtdram.c @@ -43,9 +43,6 @@ static int ram_erase(struct mtd_info *mtd, struct erase_info *instr) static int ram_point(struct mtd_info *mtd, loff_t from, size_t len, size_t *retlen, void **virt, resource_size_t *phys) { - /* can we return a physical address with this driver? */ - if (phys) - return -EINVAL; *virt = mtd->priv + from; *retlen = len; return 0; diff --git a/drivers/mtd/devices/phram.c b/drivers/mtd/devices/phram.c index d3474a48d09..9d2bf1741fb 100644 --- a/drivers/mtd/devices/phram.c +++ b/drivers/mtd/devices/phram.c @@ -51,10 +51,6 @@ static int phram_erase(struct mtd_info *mtd, struct erase_info *instr) static int phram_point(struct mtd_info *mtd, loff_t from, size_t len, size_t *retlen, void **virt, resource_size_t *phys) { - /* can we return a physical address with this driver? */ - if (phys) - return -EINVAL; - *virt = mtd->priv + from; *retlen = len; return 0; diff --git a/drivers/mtd/devices/pmc551.c b/drivers/mtd/devices/pmc551.c index 6269a434f30..c4368ec39d5 100644 --- a/drivers/mtd/devices/pmc551.c +++ b/drivers/mtd/devices/pmc551.c @@ -205,10 +205,6 @@ static int pmc551_point(struct mtd_info *mtd, loff_t from, size_t len, printk(KERN_DEBUG "pmc551_point(%ld, %ld)\n", (long)from, (long)len); #endif - /* can we return a physical address with this driver? */ - if (phys) - return -EINVAL; - soff_hi = from & ~(priv->asize - 1); soff_lo = from & (priv->asize - 1); diff --git a/drivers/mtd/devices/slram.c b/drivers/mtd/devices/slram.c index 842e4890d77..ccd39ff509b 100644 --- a/drivers/mtd/devices/slram.c +++ b/drivers/mtd/devices/slram.c @@ -99,9 +99,6 @@ static int slram_point(struct mtd_info *mtd, loff_t from, size_t len, { slram_priv_t *priv = mtd->priv; - /* can we return a physical address with this driver? */ - if (phys) - return -EINVAL; *virt = priv->start + from; *retlen = len; return(0); diff --git a/drivers/mtd/mtdcore.c b/drivers/mtd/mtdcore.c index ead52b38849..b20346e9fec 100644 --- a/drivers/mtd/mtdcore.c +++ b/drivers/mtd/mtdcore.c @@ -706,6 +706,9 @@ int mtd_point(struct mtd_info *mtd, loff_t from, size_t len, size_t *retlen, void **virt, resource_size_t *phys) { *retlen = 0; + *virt = NULL; + if (phys) + *phys = 0; if (!mtd->_point) return -EOPNOTSUPP; if (from < 0 || from > mtd->size || len > mtd->size - from) -- 2.39.5