From: Guzman Lugo, Fernando Date: Wed, 15 Dec 2010 00:54:00 +0000 (+0000) Subject: OMAP: iovmm: no gap checking for fixed address X-Git-Tag: firefly_0821_release~7613^2~3115^2~19^2^2~4 X-Git-Url: http://demsky.eecs.uci.edu/git/?a=commitdiff_plain;h=ba6e1f4ff41314906d81e6d96e646cdeafe42827;p=firefly-linux-kernel-4.4.55.git OMAP: iovmm: no gap checking for fixed address If some fixed da address is wanted to be mapped and the page is freed but it is used as gap, the mapping will fail. This patch is fixing that and olny keeps the gap for not fixed address. Signed-off-by: Fernando Guzman Lugo Acked-by: Hiroshi DOYU --- diff --git a/arch/arm/plat-omap/iovmm.c b/arch/arm/plat-omap/iovmm.c index 8ce0de247c71..34f0012b5676 100644 --- a/arch/arm/plat-omap/iovmm.c +++ b/arch/arm/plat-omap/iovmm.c @@ -289,10 +289,10 @@ static struct iovm_struct *alloc_iovm_area(struct iommu *obj, u32 da, prev_end = 0; list_for_each_entry(tmp, &obj->mmap, list) { - if (prev_end >= start) + if (prev_end > start) break; - if (start + bytes < tmp->da_start) + if (start + bytes <= tmp->da_start) goto found; if (flags & IOVMF_DA_ANON) @@ -301,7 +301,7 @@ static struct iovm_struct *alloc_iovm_area(struct iommu *obj, u32 da, prev_end = tmp->da_end; } - if ((start > prev_end) && (ULONG_MAX - start >= bytes)) + if ((start >= prev_end) && (ULONG_MAX - start + 1 >= bytes)) goto found; dev_dbg(obj->dev, "%s: no space to fit %08x(%x) flags: %08x\n",