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| author |   Linus Torvalds <torvalds@linux-foundation.org> | 2016-02-14 10:46:47 -0800 |
|---|---|---|
| committer | Linus Torvalds <torvalds@linux-foundation.org> | 2016-02-14 10:46:47 -0800 |
| commit | be3f4e0fb3e1ba33c94c43c7cdab9e5165d508b4 (patch) | |
| tree | bcc1da9a70d93c6bd3263cf22a68eeefd55facd7 /arch | |
| parent | Merge branch 'component' of git://ftp.arm.linux.org.uk/~rmk/linux-arm (diff) | |
| parent | ARM: 8519/1: ICST: try other dividends than 1 (diff) | |
| download | linux-dev-be3f4e0fb3e1ba33c94c43c7cdab9e5165d508b4.tar.xz linux-dev-be3f4e0fb3e1ba33c94c43c7cdab9e5165d508b4.zip | |
Merge branch 'fixes' of git://ftp.arm.linux.org.uk/~rmk/linux-arm
Pull ARM fixes from Russell King:
"A couple of ARM fixes from Linus for the ICST clock generator code"
[ "Linus" here is Linus Walleij. Name-stealer.
Linus "there can be only one" Torvalds ]
* 'fixes' of git://ftp.arm.linux.org.uk/~rmk/linux-arm:
ARM: 8519/1: ICST: try other dividends than 1
ARM: 8517/1: ICST: avoid arithmetic overflow in icst_hz()
Diffstat (limited to 'arch')
| -rw-r--r-- | arch/arm/common/icst.c | 9 |
1 files changed, 7 insertions, 2 deletions
diff --git a/arch/arm/common/icst.c b/arch/arm/common/icst.c index 2dc6da70ae59..d7ed252708c5 100644 --- a/arch/arm/common/icst.c +++ b/arch/arm/common/icst.c @@ -16,7 +16,7 @@ */ #include <linux/module.h> #include <linux/kernel.h> - +#include <asm/div64.h> #include <asm/hardware/icst.h> /* @@ -29,7 +29,11 @@ EXPORT_SYMBOL(icst525_s2div); unsigned long icst_hz(const struct icst_params *p, struct icst_vco vco) { - return p->ref * 2 * (vco.v + 8) / ((vco.r + 2) * p->s2div[vco.s]); + u64 dividend = p->ref * 2 * (u64)(vco.v + 8); + u32 divisor = (vco.r + 2) * p->s2div[vco.s]; + + do_div(dividend, divisor); + return (unsigned long)dividend; } EXPORT_SYMBOL(icst_hz); @@ -58,6 +62,7 @@ icst_hz_to_vco(const struct icst_params *p, unsigned long freq) if (f > p->vco_min && f <= p->vco_max) break; + i++; } while (i < 8); if (i >= 8) |