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cmd: clk: test the number of argument in setfreq command

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Test the number of argument in setfreq command to avoid a crash when
the command setfreq is called without argument:

  STM32MP> clk setfreq
  data abort
  pc : [<ddba3f18>]	   lr : [<ddba3f89>]
  reloc pc : [<c018ff18>]	   lr : [<c018ff89>]
  sp : dbaf45b8  ip : ddb1d859	 fp : 00000002
  r10: dbb3fd80  r9 : dbb11e90	 r8 : ddbf38cc
  r7 : ddb39725  r6 : 00000000	 r5 : 00000000  r4 : dbb3fd84
  r3 : dbb3fd84  r2 : 0000000a	 r1 : dbaf45bc  r0 : 00000011
  Flags: nzCv  IRQs off  FIQs off  Mode SVC_32 (T)
  Code: 4dd3 1062 85a3 ddbd (7803) 2b30
  Resetting CPU ...

Fixes: 7ab418fbe6 ("clk: add support for setting clk rate from cmdline")
Signed-off-by: Patrick Delaunay <patrick.delaunay@foss.st.com>
Reviewed-by: Sean Anderson <seanga2@gmail.com>
Link: https://lore.kernel.org/r/20220131172131.1.I32a8f213d330dccd922f7aafc60d3d63fcbe8615@changeid
This commit is contained in:
Patrick Delaunay 2022-01-31 17:21:37 +01:00 committed by Sean Anderson
parent b0cdd8287a
commit 3386fb1e48
1 changed files with 3 additions and 0 deletions
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3
cmd/clk.c
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@ -120,6 +120,9 @@ static int do_clk_setfreq(struct cmd_tbl *cmdtp, int flag, int argc,
s32 freq;
struct udevice *dev;
if (argc != 3)
return CMD_RET_USAGE;
freq = dectoul(argv[2], NULL);
dev = clk_lookup(argv[1]);