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| author | Vladimir Zapolskiy | 2015-10-01 01:23:36 +0200 |
|---|---|---|
| committer | Brian Norris | 2015-10-04 23:30:49 +0200 |
| commit | 08d3cd5ef0633df84d119e939d8d1b56c6e4a5e7 (patch) | |
| tree | 1163d0aeffd29e437d56f1bdbc52b9ccee109d6c /drivers/mtd/nand | |
| parent | mtd: nand: lpc32xx_slc: improve SLCTAC_*() macro definitions (diff) | |
| download | kernel-qcow2-linux-08d3cd5ef0633df84d119e939d8d1b56c6e4a5e7.tar.gz kernel-qcow2-linux-08d3cd5ef0633df84d119e939d8d1b56c6e4a5e7.tar.xz kernel-qcow2-linux-08d3cd5ef0633df84d119e939d8d1b56c6e4a5e7.zip | |
mtd: nand: lpc32xx_slc: fix potential overflow over 4 bits
In case if quotient of controller clock rate to device clock rate does
not fit into 4 bit value, choose the maximum acceptable value 0xF, which
stands for 16 clocks.
Signed-off-by: Vladimir Zapolskiy <vz@mleia.com>
Signed-off-by: Brian Norris <computersforpeace@gmail.com>
Diffstat (limited to 'drivers/mtd/nand')
| -rw-r--r-- | drivers/mtd/nand/lpc32xx_slc.c | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/drivers/mtd/nand/lpc32xx_slc.c b/drivers/mtd/nand/lpc32xx_slc.c index 9ac0f3b5554c..a9e8a02cdac5 100644 --- a/drivers/mtd/nand/lpc32xx_slc.c +++ b/drivers/mtd/nand/lpc32xx_slc.c @@ -95,7 +95,7 @@ * slc_tac register definitions **********************************************************************/ /* Computation of clock cycles on basis of controller and device clock rates */ -#define SLCTAC_CLOCKS(c, n, s) (((1 + (c / n)) & 0xF) << s) +#define SLCTAC_CLOCKS(c, n, s) (min_t(u32, 1 + (c / n), 0xF) << s) /* Clock setting for RDY write sample wait time in 2*n clocks */ #define SLCTAC_WDR(n) (((n) & 0xF) << 28) |