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| author | Renato Andreola <renato.andreola@imagos.it> | 2010-03-24 23:00:47 +0800 |
|---|---|---|
| committer | Stefan Roese <sr@denx.de> | 2010-03-25 09:44:58 +0100 |
| commit | c40c94a3d20a8616264c2dfcda85279185d69aeb (patch) | |
| tree | b2d1d3a8fe732f0fda392bafcb56653e2e3c9287 /drivers | |
| parent | 7027d5622d56ee2292713773044fb6352e431f31 (diff) | |
| download | u-boot-c40c94a3d20a8616264c2dfcda85279185d69aeb.zip u-boot-c40c94a3d20a8616264c2dfcda85279185d69aeb.tar.gz u-boot-c40c94a3d20a8616264c2dfcda85279185d69aeb.tar.bz2 | |
cfi_flash: precision and underflow problem in tout calculation
With old configuration it could happen tout=0 if CONFIG_SYS_HZ<1000.
Signed-off-by: Renato Andreola <renato.andreola@imagos.it>
Signed-off-by: Alessandro Rubini <rubini@gnudd.com>
Signed-off-by: Thomas Chou <thomas@wytron.com.tw>
Signed-off-by: Stefan Roese <sr@denx.de>
Diffstat (limited to 'drivers')
| -rw-r--r-- | drivers/mtd/cfi_flash.c | 5 |
1 files changed, 4 insertions, 1 deletions
diff --git a/drivers/mtd/cfi_flash.c b/drivers/mtd/cfi_flash.c index fdba297..cd1a86e 100644 --- a/drivers/mtd/cfi_flash.c +++ b/drivers/mtd/cfi_flash.c @@ -537,7 +537,10 @@ static int flash_status_check (flash_info_t * info, flash_sect_t sector, ulong start; #if CONFIG_SYS_HZ != 1000 - tout *= CONFIG_SYS_HZ/1000; + if ((ulong)CONFIG_SYS_HZ > 100000) + tout *= (ulong)CONFIG_SYS_HZ / 1000; /* for a big HZ, avoid overflow */ + else + tout = DIV_ROUND_UP(tout * (ulong)CONFIG_SYS_HZ, 1000); #endif /* Wait for command completion */ |