Minki/linux
1
0
Fork 1
mirror of https://github.com/torvalds/linux.git synced 2024-11-02 18:21:49 +00:00
Code Issues Packages Projects Releases Wiki Activity

ARM: OMAP2: possible division by 0

Browse Source 
In linus' git tree the functions can be found at:
vi arch/arm/mach-omap2/usb-tusb6010.c +200	- tusb6010_platform_retime()
vi arch/arm/mach-omap2/gpmc.c +94		- gpmc_get_fclk_period()
vi arch/arm/mach-omap2/usb-tusb6010.c +53	- tusb_set_async_mode()
vi arch/arm/mach-omap2/usb-tusb6010.c +111	- tusb_set_sync_mode()

is -ENODEV appropriate when sysclk_ps == 0?

This was found by code analysis, please review.
------------------------------>8-------------8<---------------------------------
gpmc_get_fclk_period() may return 0 when gpmc_l3_clk is not enabled. This is
not checked in tusb6010_platform_retime() nor in tusb_set_async_mode() it
seems. In tusb_set_sync_mode() this may result in a division by zero.

Signed-off-by: Roel Kluin <roel.kluin@gmail.com>
Signed-off-by: Tony Lindgren <tony@atomide.com>
This commit is contained in:
Roel Kluin 2009-04-23 11:10:49 -07:00 committed by Tony Lindgren
parent 6b7bff3169
commit d94a2eddf5
1 changed files with 1 additions and 1 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

2
arch/arm/mach-omap2/usb-tusb6010.c
View File

@ -187,7 +187,7 @@ int tusb6010_platform_retime(unsigned is_refclk)
unsigned sysclk_ps; unsigned sysclk_ps;
int status; int status;
if (!refclk_psec) if (!refclk_psec || sysclk_ps == 0)
return -ENODEV; return -ENODEV;
sysclk_ps = is_refclk ? refclk_psec : TUSB6010_OSCCLK_60; sysclk_ps = is_refclk ? refclk_psec : TUSB6010_OSCCLK_60;