1. 30 Apr, 2013 1 commit
  2. 04 Apr, 2013 11 commits
  3. 01 Apr, 2013 20 commits
  4. 13 Mar, 2013 1 commit
    • Russell King's avatar
      ARM: OMAP: use consistent error checking · 71856843
      Russell King authored
      Consistently check errors using the usual method used in the kernel
      for much of its history.  For instance:
      
      int gpmc_cs_set_timings(int cs, const struct gpmc_timings *t)
      {
      	int div;
      	div = gpmc_calc_divider(t->sync_clk);
      	if (div < 0)
      		return div;
      static int gpmc_set_async_mode(int cs, struct gpmc_timings *t)
      {
      ...
      	return gpmc_cs_set_timings(cs, t);
      
      .....
      	ret = gpmc_set_async_mode(gpmc_onenand_data->cs, &t);
      	if (IS_ERR_VALUE(ret))
      		return ret;
      
      So, gpmc_cs_set_timings() thinks any negative return value is an error,
      but where we check that in higher levels, only a limited range are
      errors...
      
      There is only _one_ use of IS_ERR_VALUE() in arch/arm which is really
      appropriate, and that is in arch/arm/include/asm/syscall.h:
      
      static inline long syscall_get_error(struct task_struct *task,
      				     struct pt_regs *regs)
      {
      	unsigned long error = regs->ARM_r0;
      	return IS_ERR_VALUE(error) ? error : 0;
      }
      
      because this function really does have to differentiate between error
      return values and addresses which look like negative numbers (eg, from
      mmap()).
      
      So, here's a patch to remove them from OMAP, except for the above.
      Acked-by: default avatarTony Lindgren <tony@atomide.com>
      Signed-off-by: default avatarRussell King <rmk+kernel@arm.linux.org.uk>
      71856843
  5. 04 Mar, 2013 2 commits
  6. 03 Mar, 2013 5 commits