[PATCH v2] lib: sbi: sbi_ecall: Check the range of SBI error

[Yu-Chien Peter Lin <peterlin@andestech.com>]

Hi Andrew,

On Wed, Feb 22, 2023 at 01:24:05PM +0100, Andrew Jones wrote:
> On Wed, Feb 22, 2023 at 10:48:54AM +0800, Yu Chien Peter Lin wrote:
> > We should also check if the return error code is greater than 0
> > (SBI_SUCCESS), as this is an invalid error.
> > 
> > Signed-off-by: Yu Chien Peter Lin <peterlin@andestech.com>
> > Reviewed-by: Xiang W <wxjstz@126.com>
> > ---
> > Changes v1 -> v2:
> > - Include Xiang's Reviewed-by
> > - Drop the 'ret -> out_err' rename
> 
> The SBI_ENOTSUPP -> SBI_ERR_NOT_SUPPORTED rename was also dropped, but as
> Anup suggests, we should probably do a full rework of that in another
> series later.
> 
> Reviewed-by: Andrew Jones <ajones@ventanamicro.com>
> 
> Thanks,
> drew

Agreed, thanks for the review.

Best regards,
Peter Lin

> 
> > ---
> >  lib/sbi/sbi_ecall.c | 2 +-
> >  1 file changed, 1 insertion(+), 1 deletion(-)
> > 
> > diff --git a/lib/sbi/sbi_ecall.c b/lib/sbi/sbi_ecall.c
> > index 27ce5d49..d0f01665 100644
> > --- a/lib/sbi/sbi_ecall.c
> > +++ b/lib/sbi/sbi_ecall.c
> > @@ -120,7 +120,7 @@ int sbi_ecall_handler(struct sbi_trap_regs *regs)
> >  		trap.epc = regs->mepc;
> >  		sbi_trap_redirect(regs, &trap);
> >  	} else {
> > -		if (ret < SBI_LAST_ERR) {
> > +		if (ret < SBI_LAST_ERR || SBI_SUCCESS < ret) {
> >  			sbi_printf("%s: Invalid error %d for ext=0x%lx "
> >  				   "func=0x%lx\n", __func__, ret,
> >  				   extension_id, func_id);
> > -- 
> > 2.34.1
> >