dany/u-boot-megous
1
0
Fork 0
mirror of https://xff.cz/git/u-boot/ synced 2025-10-31 18:35:42 +01:00
Code Issues Packages Projects Releases Wiki Activity

drivers: ddr: util.c: Fix divide by zero issue

Browse Source 
Fix possible divide by zero issue in get_memory_clk_period_ps
by adding a check

Signed-off-by: Priyanka Singh <priyanka.singh@nxp.com>
Reviewed-by: Priyanka Jain <priyanka.jain@nxp.com>
This commit is contained in:
Priyanka Singh
2021-08-19 11:39:01 +05:30
committed by Priyanka Jain
parent f8ed905900
commit a1932ece70
1 changed files with 8 additions and 4 deletions
Download Patch File Download Diff File Expand all files Collapse all files

12
drivers/ddr/fsl/util.c
View File

@@ -1,6 +1,7 @@
// SPDX-License-Identifier: GPL-2.0
/*
* Copyright 2008-2014 Freescale Semiconductor, Inc.
* Copyright 2021 NXP
*/
#include <common.h>
@@ -75,10 +76,13 @@ unsigned int get_memory_clk_period_ps(const unsigned int ctrl_num)
/* Round to nearest 10ps, being careful about 64-bit multiply/divide */
unsigned long long rem, mclk_ps = ULL_2E12;
/* Now perform the big divide, the result fits in 32-bits */
rem = do_div(mclk_ps, data_rate);
result = (rem >= (data_rate >> 1)) ? mclk_ps + 1 : mclk_ps;
if (data_rate) {
/* Now perform the big divide, the result fits in 32-bits */
rem = do_div(mclk_ps, data_rate);
result = (rem >= (data_rate >> 1)) ? mclk_ps + 1 : mclk_ps;
} else {
result = 0;
}
return result;
}