From: Tien Fong Chee tien.fong.chee@intel.com
Convert the constant integer to 'phys_size_t' to avoid overflow when calculating the SDRAM size.
Signed-off-by: Tien Fong Chee tien.fong.chee@intel.com --- drivers/ddr/altera/sdram_soc64.c | 15 ++++++++------- 1 file changed, 8 insertions(+), 7 deletions(-)
diff --git a/drivers/ddr/altera/sdram_soc64.c b/drivers/ddr/altera/sdram_soc64.c index 8cb75fe02a..a862ac8092 100644 --- a/drivers/ddr/altera/sdram_soc64.c +++ b/drivers/ddr/altera/sdram_soc64.c @@ -218,13 +218,14 @@ phys_size_t sdram_calculate_size(struct altera_sdram_platdata *plat) { u32 dramaddrw = hmc_readl(plat, DRAMADDRW);
- phys_size_t size = 1 << (DRAMADDRW_CFG_CS_ADDR_WIDTH(dramaddrw) + - DRAMADDRW_CFG_BANK_GRP_ADDR_WIDTH(dramaddrw) + - DRAMADDRW_CFG_BANK_ADDR_WIDTH(dramaddrw) + - DRAMADDRW_CFG_ROW_ADDR_WIDTH(dramaddrw) + - DRAMADDRW_CFG_COL_ADDR_WIDTH(dramaddrw)); - - size *= (2 << (hmc_ecc_readl(plat, DDRIOCTRL) & + phys_size_t size = (phys_size_t)1 << + (DRAMADDRW_CFG_CS_ADDR_WIDTH(dramaddrw) + + DRAMADDRW_CFG_BANK_GRP_ADDR_WIDTH(dramaddrw) + + DRAMADDRW_CFG_BANK_ADDR_WIDTH(dramaddrw) + + DRAMADDRW_CFG_ROW_ADDR_WIDTH(dramaddrw) + + DRAMADDRW_CFG_COL_ADDR_WIDTH(dramaddrw)); + + size *= ((phys_size_t)2 << (hmc_ecc_readl(plat, DDRIOCTRL) & DDR_HMC_DDRIOCTRL_IOSIZE_MSK));
return size;